小程序使用this.setData()来做删除无刷新

<view wx:for="{{photos_url}}" wx:for-index="index" class="mitem">
        <image class="img"  bindtap="delele" data-index="{{index}}" src="{{item}}"></image>
      </view>
delele: function (e) {
    console.log(e)
    var that = this;
    var index = e.target.dataset.index;
    var photos = that.data.photos;
    var photos_url = that.data.photos_url;
    var newphotos_url = [];
    for (var a in photos_url) {
      if (a != index) {
        newphotos_url.push(photos_url[a]);
      }
    }
    that.setData({
      photos_url: newphotos_url,
    });
  },