微信小程序实现上传图片功能

今天药忘吃喽~ 2021-09-02 04:04 609阅读 0赞

# 效果图 #

![20200910114833695.jpg][]![20200910114940709.jpg][]![20200910115003858.jpg][]

# WXML #

<view class="img-wrap">
      <view class="txt">上传图片</view>
      <view class="imglist">
        <view class="item" wx:for="{ {imgs}}" wx:key="item">
          <image src="{ {item}}" alt=""></image>
          <view class='delete' bindtap='deleteImg' data-index="{ {index}}">
            <image src="../../../images/icon.png"></image>
          </view>
        </view>
        <view class="last-item" wx:if="{ {imgs.length >= 3 ? false : true}}" bindtap="bindUpload">
          <text class="sign">+</text>
        </view>
      </view>
    </view>

# JS #

data: { 
      imgs: [],
      count: 3
    },
    bindUpload: function (e) { 
      switch (this.data.imgs.length) { 
        case 0:
          this.data.count = 3
          break
        case 1:
          this.data.count = 2
          break
        case 2:
          this.data.count = 1
          break
      }
      var that = this
      wx.chooseImage({ 
        count: that.data.count, // 默认3
        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
          for (var i = 0; i < tempFilePaths.length; i++) { 
            wx.uploadFile({ 
              url: 'https://graph.baidu.com/upload',
              filePath: tempFilePaths[i],
              name: "file",
              header: { 
                "content-type": "multipart/form-data"
              },
              success: function (res) { 
                if (res.statusCode == 200) { 
                  wx.showToast({ 
                    title: "上传成功",
                    icon: "none",
                    duration: 1500
                  })
    
                  that.data.imgs.push(JSON.parse(res.data).data)
    
                  that.setData({ 
                    imgs: that.data.imgs
                  })
                }
              },
              fail: function (err) { 
                wx.showToast({ 
                  title: "上传失败",
                  icon: "none",
                  duration: 2000
                })
              },
              complete: function (result) { 
                console.log(result.errMsg)
              }
            })
          }
        }
      })
    },
    // 删除图片
    deleteImg: function (e) { 
      var that = this
      wx.showModal({ 
        title: "提示",
        content: "是否删除",
        success: function (res) { 
          if (res.confirm) { 
            for (var i = 0; i < that.data.imgs.length; i++) { 
              if (i == e.currentTarget.dataset.index) that.data.imgs.splice(i, 1)
            }
            that.setData({ 
              imgs: that.data.imgs
            })
          } else if (res.cancel) { 
            console.log("用户点击取消")
          }
        }
      })
    }

# WXSS #

.wrap { 
      width: 100%;
      padding: 0 30rpx;
      box-sizing: border-box;
    }
    .wrap .img-wrap { 
      font-size: 30rpx;
      color: #33373E;
      margin-bottom: 10rpx;
    }
    .wrap .img-wrap .txt { 
      margin-bottom: 20rpx;
    }
    .wrap .img-wrap .imglist { 
      display: flex;
      flex-wrap: wrap;
    }
    .wrap .img-wrap .imglist .item { 
      width: 150rpx;
      height: 150rpx;
      margin-right: 22rpx;
      margin-bottom: 10rpx;
      position: relative;
    }
    .wrap .img-wrap .imglist .last-item { 
      width: 150rpx;
      height: 150rpx;
      text-align: center;
      line-height: 146rpx;
      border: 2rpx dashed #8B97A9;
      box-sizing: border-box;
    }
    .wrap .img-wrap .imglist .item image { 
      width: 100%;
      height: 100%;
    }
    .wrap .img-wrap .imglist .item .delete { 
      width: 30rpx;
      height: 30rpx;
      position: absolute;
      top: -14rpx;
      right: -12rpx;
    }

[20200910114833695.jpg]: https://img-blog.csdnimg.cn/20200910114833695.jpg
[20200910114940709.jpg]: https://img-blog.csdnimg.cn/20200910114940709.jpg
[20200910115003858.jpg]: /images/20210813/033fa9fb6c434aa8987a5efffa7d798f.png