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WeChat Mini Program: Album Selection and Taking Photos

巴扎黑
巴扎黑Original
2017-09-12 10:31:231928browse

微信小程序 拍照和相机选择详解

前言:

小程序中获取图片可通过两种方式得到,第一种是直接打开微信内部自己的样式,第一格就是相机拍照,后面是图片,第二种是弹框提示用户是要拍照还是从相册选择,下面一一来看。

选择相册要用到wx.chooseImage(OBJECT)函数,具体参数如下:

WeChat Mini Program: Album Selection and Taking Photos

直接来看打开相机相册的代码:

Page({
 data: {
  tempFilePaths: ''
 },
 onLoad: function () {
 },
 chooseimage: function () {
  var that = this;
  wx.chooseImage({
   count: 1, // 默认9 
   sizeType: ['original', '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: function (res) {
    // 返回选定照片的本地文件路径列表,tempFilePath可以作为img标签的src属性显示图片 
    that.setData({
     tempFilePaths: res.tempFilePaths
    })
   }
  })


 },








})

方法一效果图如下:

WeChat Mini Program: Album Selection and Taking Photos

个人认为第二种用户体验要好一点,效果如下:

WeChat Mini Program: Album Selection and Taking Photos

点击获取弹框提示,代码如下:

Page({
 data: {
  tempFilePaths: ''
 },
 onLoad: function () {
 },
 chooseimage: function () {
  var that = this;
  wx.showActionSheet({
   itemList: ['从相册中选择', '拍照'],
   itemColor: "#CED63A",
   success: function (res) {
    if (!res.cancel) {
     if (res.tapIndex == 0) {
      that.chooseWxImage('album')
     } else if (res.tapIndex == 1) {
      that.chooseWxImage('camera')
     }
    }
   }
  })


 },


 chooseWxImage: function (type) {
  var that = this;
  wx.chooseImage({
   sizeType: ['original', 'compressed'],
   sourceType: [type],
   success: function (res) {
    console.log(res);
    that.setData({
     tempFilePaths: res.tempFilePaths[0],
    })
   }
  })
 }




})

文件的临时路径,在小程序本次启动期间可以正常使用,如需持久保存,需在主动调用 wx.saveFile,在小程序下次启动时才能访问得到。

布局文件:

<button style="margin:30rpx;" bindtap="chooseimage">获取图片</button>
<image src="pw_tempFilePaths " catchTap="chooseImageTap" mode="aspectFit" style="width: 100%; height: 450rpx" />

官方文档:https://mp.weixin.qq.com/debug/wxadoc/dev/api/media-picture.html

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