给你个参考吧：

// 删除图片

TrashImg: function (e) {

    var arr = []

    for (var i = 0; i < this.data.imgList.length; i++) {

        if (i != e.target.dataset.idx)

            arr.push(this.data.imgList[i])

        }

    this.data.imgList = arr

    this.setData({

        imgList: this.data.imgList,

        uploadMore: true

    })

}

然后把 TrashImg 放在图片上：

<view class=‘upload-list’>

    <block wx:for-items=’{{imgList}}’ wx:key=‘imgList’ wx:for-index=‘idx’>

        <view class=‘upload-item upload-image’>

            <image src=’{{item}}’ bindlongpress=‘TrashImg’ data-idx=’{{idx}}’ mode=‘aspectFit’ />

        </view>

    </block>

    <view class=‘upload-item btn-upload’ wx:if=’{{uploadMore}}’>

        <text bindtap=‘ChooseImg’></text>

    </view>

</view>