415 lines
10 KiB
Vue
415 lines
10 KiB
Vue
<template>
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<view class="content">
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<view class="cropper-wrapper" :style="{ height: cropperOpt.height + 'px' }">
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<canvas
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class="cropper"
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:disable-scroll="true"
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@touchstart="touchStart"
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@touchmove="touchMove"
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@touchend="touchEnd"
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:style="{ width: cropperOpt.width, height: cropperOpt.height }"
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canvas-id="cropper"
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id="cropper"
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></canvas>
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<view class="cropper-circle-mask" v-show="circularCrop" :style="{
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left: `${cropperOpt.cut.x}px`,
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top: `${cropperOpt.cut.y}px`,
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width: `${cropperOpt.cut.width}px`,
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height: `${cropperOpt.cut.height}px`,
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zIndex: 100
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}"></view>
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<canvas
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class="cropper"
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:disable-scroll="true"
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:style="{
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position: 'fixed',
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top: `-${cropperOpt.width * cropperOpt.pixelRatio}px`,
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left: `-${cropperOpt.height * cropperOpt.pixelRatio}px`,
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width: `${cropperOpt.width * cropperOpt.pixelRatio}px`,
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height: `${cropperOpt.height * cropperOpt.pixelRatio}`,
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}"
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canvas-id="targetId"
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id="targetId"
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></canvas>
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</view>
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<view class="cropper-buttons safe-area-padding" :style="{ height: bottomNavHeight + 'px' }">
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<!-- #ifdef H5 -->
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<view class="upload" @tap="uploadTap">选择图片</view>
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<!-- #endif -->
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<!-- #ifndef H5 -->
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<view class="upload" @tap="uploadTap">重新选择</view>
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<!-- #endif -->
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<view class="getCropperImage" @tap="getCropperImage(false)">确定</view>
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</view>
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</view>
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</template>
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<script>
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import WeCropper from '@/utils/weCropper.js';
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export default {
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props: {
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// 裁剪矩形框的样式，其中可包含的属性为lineWidth-边框宽度(单位rpx)，color: 边框颜色，
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// mask-遮罩颜色，一般设置为一个rgba的透明度，如"rgba(0, 0, 0, 0.35)"
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boundStyle: {
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type: Object,
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default() {
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return {
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lineWidth: 4,
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borderColor: 'rgb(245, 245, 245)'
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};
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}
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},
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// 是否使用圆形裁剪
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circularCrop: {
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type: Boolean,
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default: true
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}
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},
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data() {
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return {
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// 底部导航的高度
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bottomNavHeight: 150,
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originWidth: 200,
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width: 0,
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height: 0,
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cropper: '',
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cropperOpt: {
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id: 'cropper',
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targetId: 'targetId',
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pixelRatio: 1,
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width: 0,
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height: 0,
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scale: 2.5,
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zoom: 8,
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cut: {
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x: (this.width - this.originWidth) / 2,
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y: (this.height - this.originWidth) / 2,
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width: this.originWidth,
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height: this.originWidth
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},
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boundStyle: {
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lineWidth: uni.upx2px(this.boundStyle.lineWidth)
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}
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},
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// 裁剪框和输出图片的尺寸，高度默认等于宽度
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// 输出图片宽度，单位px
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destWidth: 200,
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// 裁剪框宽度，单位px
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rectWidth: 200,
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// 输出的图片类型，如果'png'类型发现裁剪的图片太大，改成"jpg"即可
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fileType: 'png', // 改为png以支持透明背景
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src: '' // 选择的图片路径，用于在点击确定时，判断是否选择了图片
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};
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},
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onLoad(option) {
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let rectInfo = uni.getSystemInfoSync();
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this.width = rectInfo.windowWidth;
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this.height = rectInfo.windowHeight - this.bottomNavHeight;
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this.cropperOpt.width = this.width;
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this.cropperOpt.height = this.height;
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this.cropperOpt.pixelRatio = rectInfo.pixelRatio;
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if (option.destWidth) this.destWidth = Number(option.destWidth);
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if (option.rectWidth) {
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let rectWidth = Number(option.rectWidth);
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this.cropperOpt.cut = {
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x: (this.width - rectWidth) / 2,
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y: (this.height - rectWidth) / 2,
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width: rectWidth,
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height: rectWidth
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};
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}
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this.rectWidth = Number(option.rectWidth);
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if (option.fileType) this.fileType = option.fileType;
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// 圆形裁剪需要PNG格式支持透明
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if (this.circularCrop && this.fileType === 'jpg') {
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this.fileType = 'png';
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}
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// 设置圆形样式边界
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if (this.circularCrop) {
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this.cropperOpt.boundStyle.isCircle = true;
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}
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// 初始化
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this.cropper = new WeCropper(this.cropperOpt)
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.on('ready', ctx => {
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// wecropper is ready for work!
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})
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.on('beforeImageLoad', ctx => {
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// before picture loaded, i can do something
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})
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.on('imageLoad', ctx => {
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// picture loaded
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})
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.on('beforeDraw', (ctx, instance) => {
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// before canvas draw,i can do something
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});
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// 设置导航栏样式，以免用户在page.json中没有设置为黑色背景
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uni.setNavigationBarColor({
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frontColor: '#ffffff',
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backgroundColor: '#000000'
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});
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uni.chooseImage({
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count: 1, // 默认9
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sizeType: ['compressed'], // 可以指定是原图还是压缩图，默认二者都有
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sourceType: ['album', 'camera'], // 可以指定来源是相册还是相机，默认二者都有
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success: res => {
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this.src = res.tempFilePaths[0];
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// 获取裁剪图片资源后，给data添加src属性及其值
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this.cropper.pushOrign(this.src);
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}
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});
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},
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methods: {
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touchStart(e) {
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this.cropper.touchStart(e);
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},
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touchMove(e) {
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this.cropper.touchMove(e);
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},
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touchEnd(e) {
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this.cropper.touchEnd(e);
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},
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getCropperImage(isPre = false) {
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if (!this.src) return this.$toast('请先选择图片再裁剪');
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// 如果是圆形裁剪，使用与 directCircleCrop 相同的方法
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if (this.circularCrop) {
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// 使用最简单直接的方式裁剪
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const size = 300;
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// 1. 先使用weCropper获取矩形裁剪图片
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const options = {
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destWidth: size,
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destHeight: size,
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fileType: 'png'
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};
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this.cropper.getCropperImage(options, (rectPath, err) => {
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if (err) {
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console.error('矩形裁剪失败:', err);
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return;
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}
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console.log('矩形裁剪成功，路径:', rectPath);
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// 2. 创建新画布进行圆形裁剪
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const ctx = uni.createCanvasContext('targetId');
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// 先清空画布
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ctx.clearRect(0, 0, size, size);
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// 设置背景为透明
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ctx.setFillStyle('rgba(0,0,0,0)');
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ctx.fillRect(0, 0, size, size);
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// 创建圆形裁剪区域
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ctx.save();
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ctx.beginPath();
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ctx.arc(size/2, size/2, size/2, 0, 2 * Math.PI);
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ctx.clip();
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// 绘制图片到圆形区域
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ctx.drawImage(rectPath, 0, 0, size, size);
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ctx.restore();
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// 绘制并导出
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ctx.draw(false, () => {
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setTimeout(() => {
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uni.canvasToTempFilePath({
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canvasId: 'targetId',
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x: 0,
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y: 0,
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width: size,
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height: size,
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destWidth: size,
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destHeight: size,
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fileType: 'png',
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backgroundColor: 'transparent',
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success: (res) => {
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console.log('圆形裁剪成功:', res.tempFilePath);
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if (isPre) {
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uni.previewImage({
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urls: [res.tempFilePath]
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});
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} else {
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uni.$emit('uAvatarCropper', res.tempFilePath);
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uni.navigateBack();
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}
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},
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fail: (err) => {
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console.error('圆形裁剪失败:', err);
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// 失败时使用矩形图片
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if (isPre) {
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uni.previewImage({
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urls: [rectPath]
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});
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} else {
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uni.$emit('uAvatarCropper', rectPath);
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uni.navigateBack();
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}
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}
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});
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}, 300);
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});
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});
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return;
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}
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// 原始矩形裁剪方法
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this.useOriginalCrop(isPre);
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},
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// 使用原始裁剪方法
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useOriginalCrop(isPre = false) {
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// 确保使用合适的尺寸
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const size = 300; // 增大尺寸
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let cropper_opt = {
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destHeight: size,
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destWidth: size,
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fileType: this.fileType
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};
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console.log('使用原始裁剪方法，参数:', cropper_opt);
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try {
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this.cropper.getCropperImage(cropper_opt, (path, err) => {
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console.log('裁剪回调被调用', path, err);
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if (err) {
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console.error('裁剪出错:', err);
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uni.showModal({
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title: '温馨提示',
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content: err.message
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});
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} else {
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console.log('裁剪成功，路径:', path);
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if (isPre) {
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console.log('预览图片');
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uni.previewImage({
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current: '', // 当前显示图片的 http 链接
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urls: [path] // 需要预览的图片 http 链接列表
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});
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} else {
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console.log('返回上一页');
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uni.$emit('uAvatarCropper', path);
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uni.navigateBack();
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}
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}
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});
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} catch (error) {
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console.error('调用 getCropperImage 出错:', error);
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uni.showModal({
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title: '裁剪出错',
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content: error.message || '未知错误'
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});
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}
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},
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uploadTap() {
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const self = this;
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uni.chooseImage({
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count: 1, // 默认9
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sizeType: ['original', 'compressed'], // 可以指定是原图还是压缩图，默认二者都有
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sourceType: ['album', 'camera'], // 可以指定来源是相册还是相机，默认二者都有
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success: res => {
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self.src = res.tempFilePaths[0];
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// 获取裁剪图片资源后，给data添加src属性及其值
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self.cropper.pushOrign(this.src);
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}
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});
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},
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}
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};
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</script>
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<style scoped lang="scss">
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.content {
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background: rgba(255, 255, 255, 1);
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}
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.cropper {
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position: absolute;
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top: 0;
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left: 0;
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width: 100%;
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height: 100%;
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z-index: 11;
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}
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.cropper-circle-mask {
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position: absolute;
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border-radius: 50%;
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box-shadow: 0 0 0 999px rgba(0, 0, 0, 0.35);
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z-index: 12;
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pointer-events: none; /* Allow touches to pass through to the canvas underneath */
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box-sizing: border-box;
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}
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.cropper-buttons {
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background-color: #000000;
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color: #eee;
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}
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.cropper-wrapper {
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position: relative;
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display: flex;
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flex-direction: row;
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justify-content: space-between;
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align-items: center;
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width: 100%;
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background-color: #000;
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}
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.cropper-buttons {
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width: 100vw;
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display: flex;
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flex-direction: row;
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justify-content: space-between;
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align-items: center;
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position: fixed;
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bottom: 0;
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left: 0;
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font-size: 28rpx;
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}
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.cropper-buttons .upload,
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.cropper-buttons .getCropperImage,
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.cropper-buttons .test,
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.cropper-buttons .test2,
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.cropper-buttons .test3,
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.cropper-buttons .test4 {
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width: 16.6%;
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text-align: center;
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}
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.cropper-buttons .upload {
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text-align: left;
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padding-left: 50rpx;
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}
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.cropper-buttons .test {
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color: #ffeb3b;
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}
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.cropper-buttons .test2 {
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color: #4caf50;
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}
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.cropper-buttons .test3 {
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color: #ff9800;
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}
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.cropper-buttons .test4 {
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color: #e91e63;
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}
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.cropper-buttons .getCropperImage {
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text-align: right;
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padding-right: 50rpx;
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}
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</style> |