微信小程序实现图片处理小工具的示例代码

//照片上传的代码
  takephoto:function(){
    var self = this;
    wx.chooseImage({
      count: 1, // 最多可以选择的图片张数，默认9
      sizeType: ['original', 'compressed'], // original 原图，compressed 压缩图，默认二者都有
      sourceType: ['album', 'camera'], // album 从相册选图，camera 使用相机，默认二者都有
      success: function(res){
        self.setData({
            // picArray:res.tempFilePaths
            pic:res.tempFilePaths
        });
        wx.setStorageSync('img', res.tempFilePaths)
        console.log(res);
      }
    })
  },

<!--picture.wxml-->
<view class="addpicture">
  <image class="{{addblur == 1 ? 'addblur':''}}{{oldEffect == 1 ?'oldeffect':''}} {{addretro == 1 ?'addretro':''}}{{addBeati == 1 ? 'addBeati':''}} img " mode="aspectFit" src="{{pic}}"></image>
  <view class="effectview">
    <button class="btn" bindtap="addblur">模糊</button>
    <button class="btn" bindtap="addOld">怀旧</button>
    <button class="btn" bindtap="addretro">复古</button>
    <button class="btn" bindtap="addBeati">美白</button>
  </view>
   <button bindtap="originpic" class="mid">还原</button>
   <button bindtap="takephoto" class="foot">选择照片</button>
</view> 

<!--picture.wxss-->
.addpicture{
    display: flex;
    flex-direction: column;
    width:100%;
    height: 1500rpx;
}

.foot{
    display: flex;
    margin-top:3%;
    width: 80%;
    height: 80rpx;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    background-color: #faa770;
}

.foot::after{
    border-width: 0;
}

.img{
    width: 100%;
}


.addblur {
    filter: blur(6px);
}
.btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width:20%;
    height:70rpx;
    font-size:14px;
}
.effectview {
    margin-top: 3%;
    width: 100%;
    display: flex;
    flex-direction: row;
    justify-content: space-around;
}

.mid{
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 3%;
    width: 80%;
    height: 80rpx;
    color:white;
    background-color: #757F9A;
}

.mid::after{
    border-width: 0;
}

.oldeffect {
    filter: sepia(.5);
}
.addretro {
    filter: grayscale(1);
}
.addBeati {
    filter:  brightness(130%);
}

//调整代码

​​​​​​​  baohedu: function (e) {
    var self = this;
    self.setData({
      saturate: e.detail.value
    });
  },
  liangdu: function (e) {
    var self = this;
    self.setData({
      brightness: e.detail.value
    });
  },
  duibidu: function (e) {
    var self = this;
    self.setData({
      contrast: e.detail.value
    });
  },

.pic {
    margin-top: 20px;
    width: 100%;
}
@keyframes picAnamiton {
    0% {
        filter: grayscale(.5) blur(1px) saturate(2);
    }
    100% {
        filter: grayscale(.2) blur(6px) saturate(9);
    }
}
.picanmaion {
    animation-name: picAnamiton;
    animation-duration: 2s;
    animation-iteration-count: 10;
    animation-direction: alternate;
    animation-timing-function: ease-in-out;
    animation-fill-mode: forwards;
    animation-delay: 0s;
}