小程序单张图片 和 九宫格图片上传、预览、删除示例

Demo下载地址：https://github.com/ybx13579/xiaochengxu-uploadImg

1、九宫格图片 （一次性多张）上传预览删除

代码地址：https://www.cnblogs.com/cqlb/p/9682505.html#t8 
效果图： 

2、单张图片（单词）上传：（以下全部复制即可查看效果）

示例图： 
 
Wxml:

<view class="gallery">
  <view class='tipTitle'>
    快去上传自己的照片吧
  </view>
  <view class='item-ot'>
    <view class="item">
      <!-- 添加按钮 -->
      <view class="addIcon" bindtap="chooseImage" wx:if="{{imgBoolean}}">
          <view class=''>+</view>
      </view>
      <!-- 上传的图 -->
      <view class='itemImg' >
        <image src="{{item}}" data-src="{{item}}" bindtap="previewImage"  mode="aspectFill" />
        <!-- 删除按钮 -->
        <view class="delete" bindtap="deleteImg" data-index="{{index}}">X</view>
      </view>
      <view class='boxStyle'></view>
    </view>
    <view class='itemTxt'>正面照</view>
  </view>
  <view class='uploadFinish'>
    <a class="uploadFinishBtn" href="javasctipt:;"  bindtap="submit">提  交</a>
  </view> 
</view>

wxss:

/*画廊*/
.gallery {    
  100%;
  margin: 0 auto;
  display: flex;    
  justify-content: flex-start;    
  flex-wrap: wrap;
  background: #fffaf0;
}
/*每张图片所占容器*/
.item-ot{
  margin:0 auto;
   100%;
  height: 100%;
}
.item {    
  position:relative;
  margin:0 auto;
  370rpx;
  height:490rpx;
  background:#eee;
  border:2rpx solid #f9c4c2;
  /* overflow:hidden; */
}
.itemImg{
  position: absolute;
  left: 0;
  top:0; 
   100%;
  height: 100%;
  overflow: hidden;
  z-index:1;
}
.itemImg image{
   100%;
  height: 100%;
}
/*add按钮*/
 .addIcon{
   position:absolute;
  left: 0;
  top: 0; 
   100%;
  height: 100%;
  text-align:center;
  line-height:490rpx;
  font-size:80rpx;
  background: #fff;
  color: #999;
  z-index:2;
}
/*删除按钮*/
.delete {    
  position:absolute;
  right:0;
  top:0;
  /* background:#ccc; */
  opacity:1;
  height: 36rpx;
  font-size:22rpx;
  font-weight:700;
  padding:0 8rpx 0 10rpx;
  color: #999;
}
.itemTxt{
  text-align: center;
  font-size: 30rpx;
  color: #999;
  margin-top: 50rpx;
  margin-bottom:  70rpx;
  font-weight: 700;
}
.uploadFinish{
   100%;
  height: 100%;
  padding: 0 30rpx;
  box-sizing: border-box;
}
.uploadFinishBtn{
  background: #ff6666;
  color: #fff;
  display: block;
   100%;
  padding: 26rpx 0;
  text-align: center;
  font-size: 36rpx;
  border-radius: 10rpx;
  margin-bottom: 40rpx;
}
.tipTitle{
  text-align: center;
  font-size: 30rpx;
  color: #f6a29d;
  font-weight: 700;
   100%;
  margin: 50rpx 0;
}
.boxStyle{
  300rpx;
  height:100rpx;
  position:absolute;
  bottom:-1rpx;
  border-radius:50%;
  box-shadow:0rpx 10rpx 100rpx #fddbd9;
  margin-left:35rpx;
}

js:

Page({
  data: {
    uploadedImages: [],
    imgBoolean: true,
  },
  onLoad: function (options) {
    var that = this;
  },
  chooseImage: function () {
    var that = this;
    // 选择图片
    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
        var tempFilePaths = res.tempFilePaths
        that.setData({
          item: tempFilePaths[0],
          imgBoolean: false
        });
      }
    })
  },
  // 图片预览
  previewImage: function (e) {
    var current = e.target.dataset.src
    wx.previewImage({
      current: current,
      urls: [current]
    })
    console.log("这是1" + current);
  },
  //删除图片
  deleteImg: function (e) {
    var that = this;
    var images = that.data.uploadedImages;
    that.setData({
      uploadedImages: images,
      imgBoolean: true
    });
  },
  // submit: function () {        

  // }, 
})

3、多次单图上传预览（以下全部复制即可查看效果）

<view class="gallery">
  <view class='tipTitle'>
    快去上传自己的照片吧
  </view>
  <view class='item-ot'>
    <view class="item">
      <!-- 添加按钮 -->
      <view class="addIcon" bindtap="chooseImage" wx:if="{{imgBoolean}}">
          <view class=''>+</view>
      </view>
      <!-- 上传的图 -->
      <view class='itemImg' >
        <image src="{{item}}" data-src="{{item}}" bindtap="previewImage"  mode="aspectFill" />
        <!-- 删除按钮 -->
        <view class="delete" bindtap="deleteImg" data-index="{{index}}">X</view>
      </view>
      <view class='boxStyle'></view>
    </view>
    <view class='itemTxt'>正面照</view>
  </view>

  <view class='item-ot'>
   <view class="item">
      <!-- 添加按钮 -->
      <view class="addIcon" bindtap="chooseImage2" wx:if="{{imgBoolean2}}">
          <view class=''>+</view>
      </view>
      <!-- 上传的图 -->
      <view class='itemImg' >
        <image src="{{item2}}" data-src="{{item2}}" bindtap="previewImage2"  mode="aspectFill" />
        <!-- 删除按钮 -->
        <view class="delete" bindtap="deleteImg2" data-index="{{index2}}">X</view>
      </view>
      <view class='boxStyle'></view>
    </view>
    <view class='itemTxt'>45度侧脸</view>
  </view>

  <view class='item-ot'>
    <view class="item">
      <!-- 添加按钮 -->
      <view class="addIcon" bindtap="chooseImage3" wx:if="{{imgBoolean3}}">
          <view class=''>+</view>
      </view>
      <!-- 上传的图 -->
      <view class='itemImg' >
        <image src="{{item3}}" data-src="{{item3}}" bindtap="previewImage3"  mode="aspectFill" />
        <!-- 删除按钮 -->
        <view class="delete" bindtap="deleteImg3" data-index="{{index3}}">X</view>
      </view>
      <view class='boxStyle'></view>
    </view>
    <view class='itemTxt'>侧面照</view>
  </view>
  <view class='uploadFinish'>
    <a class="uploadFinishBtn" href="javasctipt:;"  bindtap="submit">提  交</a>
  </view> 
  <view class='statementTxt'>
      <view>我们会尊重并严格保护您的隐私</view>  
  </view>
</view>

Page({
  data: {
    uploadedImages: [],
    uploadedImages2: [],
    uploadedImages3: [],
    imgBoolean: true,
    imgBoolean2: true,
    imgBoolean3: true,
  },
  onLoad: function (options) {
    var that = this;

  },
  chooseImage: function () {
    var that = this;
    // 选择图片
    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
        var tempFilePaths = res.tempFilePaths
        that.setData({
          item: tempFilePaths[0],
          imgBoolean: false
        });
      }
    })
  },
  // 图片预览
  previewImage: function (e) {
    var current = e.target.dataset.src
    wx.previewImage({
      current: current,
      urls: [current]
    })
    console.log("这是1" + current);
  },
  //删除图片
  deleteImg: function (e) {
    var that = this;
    var images = that.data.uploadedImages;
    that.setData({
      uploadedImages: images,
      imgBoolean: true
    });
  },
  chooseImage2: function () {
    var that = this;
    // 选择图片
    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
        var tempFilePaths = res.tempFilePaths
        that.setData({
          item2: tempFilePaths[0],
          imgBoolean2: false
        });
      }
    })
  },
  // 图片预览
  previewImage2: function (e) {
    var current = e.target.dataset.src
    wx.previewImage({
      current: current,
      urls: [current]
    })
  },
  //删除图片
  deleteImg2: function (e) {
    var that = this;
    var images = that.data.uploadedImages2;
    that.setData({
      uploadedImages2: images,
      imgBoolean2: true
    });
  },
  chooseImage3: function () {
    var that = this;
    // 选择图片
    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
        var tempFilePaths = res.tempFilePaths
        that.setData({
          item3: tempFilePaths[0],
          imgBoolean3: false
        });
      }
    })
  },
  // 图片预览
  previewImage3: function (e) {
    var current = e.target.dataset.src
    wx.previewImage({
      current: current,
      urls: [current]
    })
  },
  //删除图片
  deleteImg3: function (e) {
    var that = this;
    var images = that.data.uploadedImages3;
    that.setData({
      uploadedImages3: images,
      imgBoolean3: true
    });
  },
   submit: function () {        

   }, 
})

/*画廊*/
.gallery {    
  100%;
  margin: 0 auto;
  display: flex;    
  justify-content: flex-start;    
  flex-wrap: wrap;
  background: #fffaf0;
}
/*每张图片所占容器*/
.item-ot{
  margin:0 auto;
   100%;
  height: 100%;
}
.item {    
  position:relative;
  margin:0 auto;
  370rpx;
  height:490rpx;
  background:#eee;
  border:2rpx solid #f9c4c2;
  /* overflow:hidden; */
}
.itemImg{
  position: absolute;
  left: 0;
  top:0; 
   100%;
  height: 100%;
  overflow: hidden;
  z-index:1;
}
.itemImg image{
   100%;
  height: 100%;
}
/*add按钮*/
 .addIcon{
   position:absolute;
  left: 0;
  top: 0; 
   100%;
  height: 100%;
  text-align:center;
  line-height:490rpx;
  font-size:80rpx;
  background: #fff;
  color: #999;
  z-index:2;
}
/*删除按钮*/
.delete {    
  position:absolute;
  right:0;
  top:0;
  /* background:#ccc; */
  opacity:1;
  height: 36rpx;
  font-size:22rpx;
  font-weight:700;
  padding:0 8rpx 0 10rpx;
  color: #999;
}
.itemTxt{
  text-align: center;
  font-size: 30rpx;
  color: #999;
  margin-top: 50rpx;
  margin-bottom:  70rpx;
  font-weight: 700;
}
.uploadFinish{
   100%;
  height: 100%;
  padding: 0 30rpx;
  box-sizing: border-box;
}
.uploadFinishBtn{
  background: #ff6666;
  color: #fff;
  display: block;
   100%;
  padding: 26rpx 0;
  text-align: center;
  font-size: 36rpx;
  border-radius: 10rpx;
  margin-bottom: 40rpx;
}
.uploadFinishBtn:hover{
  background: #f15c5c;
}
.tipTitle{
  text-align: center;
  font-size: 30rpx;
  color: #f6a29d;
  font-weight: 700;
   100%;
  margin: 50rpx 0;
}
.boxStyle{
  300rpx;
  height:100rpx;
  position:absolute;
  bottom:-1rpx;
  border-radius:50%;
  box-shadow:0rpx 10rpx 100rpx #fddbd9;
  margin-left:35rpx;
}
/*声明文字*/
.statementTxt{
   100%;
  color: #bbb;
  font-size: 26rpx;
  text-align: center;
  margin-bottom: 60rpx;
  font-weight: 100;
}
/*顶部文字*/
.ry-top{
   100%;
  height: 300rpx;
  background: linear-gradient(to bottom right, #faccc8 , #fffbf0);
  overflow: hidden;
  position: relative;
  box-sizing: border-box;
  padding-top: 50rpx;
}
.ry-top-tip{
   100%;
  height: 100%;
  position: relative;
}