小程序裁剪

使用上一篇文件的cropper插件引入后

wxml

<import src="../we/we-cropper.wxml"/>
<view class="cropper-wrapper">
<template is="we-cropper" data="{{...cropperOpt}}"/>

</view>
<view class="cropper-buttons">
<button class="upload"
bindtap="uploadTap">
重新上传
</button>
<button
class="getCropperImage"
bindtap="mygetCropperImage">
确定
</button>
</view>

wxss

/* pages/cut/index.wxss */

.cropper-wrapper{
  position: relative;
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  justify-content: center;
  height: 100%;
  background-color: #e5e5e5;
}

.cropper-buttons{
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  position: absolute;
  bottom: 0;
  left: 0;
   100%;
  height: 150px;
  padding: 0 20rpx;
  box-sizing: border-box;
  line-height: 150px;
}

.cropper-buttons .upload, .cropper-buttons .getCropperImage{
  text-align: center;
  z-index: 999999;
  margin: 10rpx;
  background-color: #36ccf9;
}

js

const Util = require('../../../../utils/util.js');
const app = getApp()
const {
  regeneratorRuntime
} = global

import WeCropper from '../we/we-cropper.js';
const device = wx.getSystemInfoSync() // 获取设备信息
const width = device.windowWidth // 示例为一个与屏幕等宽的正方形裁剪框
const height = device.windowHeight -150


Page({
    data: {
        cropperOpt: {
            id: 'cropper', // 用于手势操作的canvas组件标识符
            targetId: 'targetCropper', // 用于用于生成截图的canvas组件标识符
            pixelRatio: device.pixelRatio, // 传入设备像素比
            width, // 画布宽度
            height, // 画布高度
            src: '',
            scale: 2.5, // 最大缩放倍数
            zoom: 8, // 缩放系数
            cut: {
                x: (width - 320) / 2, // 裁剪框x轴起点
                y: (width - 320) / 2, // 裁剪框y轴起点
                 320, // 裁剪框宽度
                height: 320 // tore/"裁剪框高度
            }
        }
    },
    // 页面onLoad函数中实例化WeCropper
    onLoad: function(options) {

        const {
          cropperOpt
        } = this.data;
        cropperOpt.src = options.src;
        if (cropperOpt.src) {
          this.cropper = new WeCropper(cropperOpt)
            .on('ready', (ctx) => {
              console.log(`wecropper is ready for work!`)
            })
            .on('beforeImageLoad', (ctx) => {
               wx.showToast({
                 title: '上传中',
                 icon: 'loading',
                duration: 3000
               })
             })
            .on('imageLoad', (ctx) => {
               wx.hideToast()
             })
        }
    },
    // 插件通过touchStart、touchMove、touchEnd方法来接收事件对象。
    touchStart(e) {
        this.cropper.touchStart(e)
    },
    touchMove(e) {
        this.cropper.touchMove(e)
    },
    touchEnd(e) {
        this.cropper.touchEnd(e)
    },
    // 自定义裁剪页面的布局中，可以重新选择图片
    uploadTap() {
        const self = this
        wx.chooseImage({
            count: 1, // 默认9
            sizeType: ['compressed'], // 可以指定是原图还是压缩图，默认二者都有
            sourceType: ['album', 'camera'], // 可以指定来源是相册还是相机，默认二者都有
            success(res) {
                const src = res.tempFilePaths[0]
                self.cropper.pushOrign(src)
              
            }
        })
    },

    // 生成图片
    mygetCropperImage(){
      var that = this;
        this.cropper.getCropperImage((tempFilePath) => {
            // tempFilePath 为裁剪后的图片临时路径
            if (tempFilePath) {
                //TODO 处理逻辑
            }else{
                console.log('获取图片地址失败，请稍后重试')
            }
        })
      }
})

json

{
  "navigationBarTitleText": "裁剪",
  "usingComponents": {}
}