506 lines
12 KiB
Vue
506 lines
12 KiB
Vue
<template>
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<view class="tui-cropper__box" @touchmove.stop.prevent="stop">
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<image
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@load="imageLoad"
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@error="imageLoad"
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@touchstart="parse.touchstart"
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@touchmove="parse.touchmove"
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@touchend="parse.touchend"
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:data-minScale="minScale"
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:data-maxScale="maxScale"
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:style="{
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width: (imgWidth ? imgWidth : width) + 'px',
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height: imgHeight ? imgHeight + 'px' : 'auto',
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transitionDuration: (animation ? 0.3 : 0) + 's'
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}"
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class="tui-cropper__image"
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:src="imageUrl"
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v-if="imageUrl"
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mode="widthFix"
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></image>
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<view class="tui-backdrop__cropper" :style="{ width: width + 'px', height: height + 'px', borderRadius: isRound ? '50%' : '0' }">
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<view
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class="tui-cropper__border"
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:change:prop="parse.propsChange"
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:prop="props"
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:data-width="width"
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:data-height="height"
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:data-windowHeight="sysInfo.windowHeight || 600"
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:data-windowWidth="sysInfo.windowWidth || 400"
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:data-imgTop="imgTop"
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:data-imgLeft="imgLeft"
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:data-imgWidth="imgWidth"
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:data-imgHeight="imgHeight"
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:data-angle="angle"
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:style="{ borderRadius: isRound ? '50%' : '0', border: border }"
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></view>
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</view>
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<canvas
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canvas-id="tui-image__cropper"
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id="tui-image__cropper"
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:disable-scroll="true"
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:style="{ width: width * scaleRatio + 'px', height: height * scaleRatio + 'px' }"
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class="tui-cropper__canvas"
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></canvas>
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<view class="tui-cropper__tabbar" v-if="!custom">
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<view class="tui-op__btn" @tap.stop="back">取消</view>
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<image :src="rotateImg" class="tui-rotate__img" @tap="setAngle"></image>
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<view class="tui-op__btn" @tap.stop="getImage">完成</view>
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</view>
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</view>
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</template>
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<script src="./tui-cropper.wxs" module="parse" lang="wxs"></script>
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<script>
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export default {
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name: 'tuiCropper',
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props: {
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//图片路径
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imageUrl: {
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type: String,
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default: ''
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},
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//裁剪框高度 px
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height: {
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type: Number,
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default: 280
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},
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//裁剪框宽度 px
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width: {
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type: Number,
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default: 280
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},
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//是否为圆形裁剪框
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isRound: {
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type: Boolean,
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default: true
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},
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//裁剪框边框
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border: {
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type: String,
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default: '1px solid #fff'
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},
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//生成的图片尺寸相对剪裁框的比例
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scaleRatio: {
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type: Number,
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default: 2
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},
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//图片的质量，取值范围为 (0, 1]，不在范围内时当作1.0处理
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quality: {
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type: Number,
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default: 0.8
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},
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//图片旋转角度
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rotateAngle: {
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type: Number,
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default: 0
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},
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//图片最小缩放比
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minScale: {
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type: Number,
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default: 0.5
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},
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//图片最大缩放比
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maxScale: {
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type: Number,
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default: 2
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},
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//自定义操作栏（为true时隐藏底部操作栏）
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custom: {
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type: Boolean,
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default: false
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},
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//值发生改变开始裁剪（custom为true时生效）
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startCutting: {
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type: [Number, Boolean],
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default: 0
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},
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/**
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* 是否返回base64(H5端默认base64)
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* 支持平台：App，微信小程序，支付宝小程序,H5(默认url就是base64)
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**/
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isBase64: {
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type: Boolean,
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default: false
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},
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//裁剪时是否显示loadding
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loadding: {
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type: Boolean,
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default: true
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},
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//旋转icon
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rotateImg: {
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type: String,
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default: '/static/components/cropper/img_rotate.png'
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}
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},
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data() {
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return {
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TIME_CUT_CENTER: null,
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cutX: 0, //画布x轴起点
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cutY: 0, //画布y轴起点0
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imgWidth: 0,
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imgHeight: 0,
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scale: 1, //图片缩放比
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angle: 0, //图片旋转角度
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animation: false, //是否开启图片过渡效果
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animationTime: null,
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imgTop: 0,
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imgLeft: 0,
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ctx: null,
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sysInfo: {},
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props: '',
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sizeChange: 0, //2
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angleChange: 0, //3
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resetChange: 0, //4
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centerChange: 0 //5
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};
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},
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watch: {
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//定义变量然后利用change触发
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imageUrl(val, oldVal) {
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this.imageReset();
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this.showLoading();
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uni.getImageInfo({
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src: val,
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success: res => {
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//计算图片尺寸
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this.imgComputeSize(res.width, res.height);
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this.angleChange++;
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this.props = `3,${this.angleChange}`;
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},
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fail: err => {
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this.imgComputeSize();
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this.angleChange++;
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this.props = `3,${this.angleChange}`;
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}
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});
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},
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rotateAngle(val) {
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this.animation = true;
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this.angle = val;
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this.angleChanged(val);
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},
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animation(val) {
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//开启过渡220毫秒之后自动关闭
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clearTimeout(this.animationTime);
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if (val) {
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this.animationTime = setTimeout(() => {
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this.animation = false;
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}, 220);
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}
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},
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startCutting(val) {
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if (this.custom && val) {
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this.getImage();
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}
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}
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},
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mounted() {
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this.sysInfo = uni.getSystemInfoSync();
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this.imgTop = this.sysInfo.windowHeight / 2;
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this.imgLeft = this.sysInfo.windowWidth / 2;
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this.ctx = uni.createCanvasContext('tui-image__cropper', this);
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//初始化
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setTimeout(() => {
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this.props = '1,1';
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}, 0);
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setTimeout(() => {
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this.$emit('ready', {});
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}, 200);
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},
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methods: {
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//网络图片转成本地文件[同步执行]
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async getLocalImage(url) {
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return await new Promise((resolve, reject) => {
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uni.downloadFile({
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url: url,
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success: res => {
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resolve(res.tempFilePath);
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},
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fail: res => {
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reject(false);
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}
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});
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});
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},
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//返回裁剪后图片信息
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getImage() {
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if (!this.imageUrl) {
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uni.showToast({
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title: '请选择图片',
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icon: 'none'
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});
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return;
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}
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this.loadding && this.showLoading();
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let draw = async () => {
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//图片实际大小
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let imgWidth = this.imgWidth * this.scale * this.scaleRatio;
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let imgHeight = this.imgHeight * this.scale * this.scaleRatio;
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//canvas和图片的相对距离
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let xpos = this.imgLeft - this.cutX;
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let ypos = this.imgTop - this.cutY;
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//旋转画布
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this.ctx.translate(xpos * this.scaleRatio, ypos * this.scaleRatio);
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this.ctx.rotate((this.angle * Math.PI) / 180);
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let imgUrl = this.imageUrl;
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// #ifdef APP-PLUS || MP-WEIXIN
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if (~this.imageUrl.indexOf('https:')) {
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imgUrl = await this.getLocalImage(this.imageUrl);
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}
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// #endif
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this.ctx.drawImage(imgUrl, -imgWidth / 2, -imgHeight / 2, imgWidth, imgHeight);
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this.ctx.draw(false, () => {
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let params = {
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width: this.width * this.scaleRatio,
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height: Math.round(this.height * this.scaleRatio),
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destWidth: this.width * this.scaleRatio,
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destHeight: Math.round(this.height) * this.scaleRatio,
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fileType: 'png',
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quality: this.quality
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};
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let data = {
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url: '',
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base64: '',
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width: this.width * this.scaleRatio,
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height: this.height * this.scaleRatio
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};
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// #ifdef MP-ALIPAY
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if (this.isBase64) {
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this.ctx.toDataURL(params).then(dataURL => {
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data.base64 = dataURL;
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this.loadding && uni.hideLoading();
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this.$emit('cropper', data);
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});
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} else {
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this.ctx.toTempFilePath({
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...params,
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success: res => {
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data.url = res.tempFilePath;
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this.loadding && uni.hideLoading();
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this.$emit('cropper', data);
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}
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});
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}
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// #endif
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// #ifndef MP-ALIPAY
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// #ifdef MP-BAIDU || MP-TOUTIAO || H5
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this.isBase64 = false;
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// #endif
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if (this.isBase64) {
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uni.canvasGetImageData(
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{
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canvasId: 'tui-image__cropper',
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x: 0,
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y: 0,
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width: this.width * this.scaleRatio,
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height: Math.round(this.height * this.scaleRatio),
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success: res => {
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const arrayBuffer = new Uint8Array(res.data);
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const base64 = uni.arrayBufferToBase64(arrayBuffer);
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data.base64 = base64;
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this.loadding && uni.hideLoading();
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this.$emit('cropper', data);
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}
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},
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this
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);
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} else {
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uni.canvasToTempFilePath(
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{
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...params,
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canvasId: 'tui-image__cropper',
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success: res => {
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data.url = res.tempFilePath;
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// #ifdef H5
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data.base64 = res.tempFilePath;
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// #endif
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this.loadding && uni.hideLoading();
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this.$emit('cropper', data);
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},
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fail(res) {
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console.log(res);
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}
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},
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this
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);
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}
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// #endif
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});
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};
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draw();
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},
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change(e) {
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this.cutX = e.cutX || 0;
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this.cutY = e.cutY || 0;
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this.imgWidth = e.imgWidth || this.imgWidth;
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this.imgHeight = e.imgHeight || this.imgHeight;
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this.scale = e.scale || 1;
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this.angle = e.angle || 0;
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this.imgTop = e.imgTop || 0;
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this.imgLeft = e.imgLeft || 0;
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},
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imageReset() {
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this.scale = 1;
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this.angle = 0;
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let sys = this.sysInfo.windowHeight ? this.sysInfo : uni.getSystemInfoSync();
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this.imgTop = sys.windowHeight / 2;
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this.imgLeft = sys.windowWidth / 2;
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this.resetChange++;
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this.props = `4,${this.resetChange}`;
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//初始化旋转角度 0deg
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this.$emit('initAngle', {});
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},
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imgComputeSize(width, height) {
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//默认按图片最小边 = 对应裁剪框尺寸
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let imgWidth = width,
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imgHeight = height;
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if (imgWidth && imgHeight) {
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if (imgWidth / imgHeight > this.width / this.height) {
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imgHeight = this.height;
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imgWidth = (width / height) * imgHeight;
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} else {
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imgWidth = this.width;
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imgHeight = (height / width) * imgWidth;
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}
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} else {
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let sys = this.sysInfo.windowHeight ? this.sysInfo : uni.getSystemInfoSync();
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imgWidth = sys.windowWidth;
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imgHeight = 0;
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}
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this.imgWidth = imgWidth;
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this.imgHeight = imgHeight;
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this.sizeChange++;
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this.props = `2,${this.sizeChange}`;
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},
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imageLoad(e) {
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this.imageReset();
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uni.hideLoading();
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this.$emit('imageLoad', {});
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},
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moveStop() {
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clearTimeout(this.TIME_CUT_CENTER);
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this.TIME_CUT_CENTER = setTimeout(() => {
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this.centerChange++;
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this.props = `5,${this.centerChange}`;
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}, 666);
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},
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moveDuring() {
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clearTimeout(this.TIME_CUT_CENTER);
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},
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showLoading() {
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uni.showLoading({
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title: '请稍候...',
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mask: true
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});
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},
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stop() {},
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back() {
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uni.navigateBack();
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},
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angleChanged(val) {
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this.moveStop();
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if (val % 90) {
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this.angle = Math.round(val / 90) * 90;
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}
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this.angleChange++;
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this.props = `3,${this.angleChange}`;
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},
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setAngle() {
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this.animation = true;
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this.angle = this.angle + 90;
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this.angleChanged(this.angle);
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}
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}
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};
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</script>
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<style scoped>
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.tui-cropper__box {
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width: 100vw;
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height: 100vh;
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background-color: rgba(0, 0, 0, 0.7);
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position: fixed;
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top: 0;
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left: 0;
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z-index: 1;
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}
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.tui-cropper__image {
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width: 100%;
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border-style: none;
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position: absolute;
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top: 0;
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left: 0;
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z-index: 2;
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-webkit-backface-visibility: hidden;
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backface-visibility: hidden;
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transform-origin: center;
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}
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.tui-cropper__canvas {
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position: fixed;
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z-index: 10;
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left: -2000px;
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top: -2000px;
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pointer-events: none;
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}
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.tui-backdrop__cropper {
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position: fixed;
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z-index: 4;
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left: 50%;
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top: 50%;
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transform: translate(-50%, -50%);
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border: 3000px solid rgba(0, 0, 0, 0.55);
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pointer-events: none;
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}
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.tui-cropper__border {
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position: absolute;
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left: 0;
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top: 0;
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width: 100%;
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height: 100%;
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box-sizing: border-box;
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pointer-events: none;
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}
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.tui-cropper__tabbar {
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width: 100%;
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height: 120rpx;
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padding: 0 40rpx;
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box-sizing: border-box;
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position: fixed;
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left: 0;
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bottom: 0;
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z-index: 99;
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display: flex;
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align-items: center;
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justify-content: space-between;
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color: #ffffff;
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font-size: 32rpx;
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}
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.tui-cropper__tabbar::after {
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content: ' ';
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position: absolute;
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top: 0;
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right: 0;
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left: 0;
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border-top: 1rpx solid rgba(255, 255, 255, 0.2);
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-webkit-transform: scaleY(0.5) translateZ(0);
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transform: scaleY(0.5) translateZ(0);
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transform-origin: 0 100%;
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}
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.tui-op__btn {
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height: 80rpx;
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display: flex;
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align-items: center;
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}
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.tui-rotate__img {
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width: 44rpx;
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height: 44rpx;
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}
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</style>
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