最初打算使用scroll-view实现，效果好、流畅、有惯性滑动，但由于滚动条没法去掉、无法实现上下层的帧布局，最终放弃了。
还是自己写个吧，利用手势事件。遗憾的是小程序中目前没有像Android中快速滑动事件，所以，要实现惯性滑动是不可能了。
item的布局：
推荐小程序优先使用flex布局，完全够用。这也是微信推荐的。
<view wx:for="{{cardTeams}}" wx:for-item="cardTeam" bindtouchstart="drawStart" bindtouchmove="drawMove" bindtouchend="drawEnd"> <image src="https://img02.tooopen.com/images/20150928/tooopen_sy_143912755726.jpg" mode="scaleToFill"></image> <view> <text>{{cardTeam.name}}</text> <view> <view>-</view> <text>1</text> <view>+</view> </view> <view> <text>¥</text> <text>99.80</text> </view> </view> <view><view>确定</view></view> <view data-id="{{cardTeam.id}}" bindtap="delItem"><view>删除</view></view> </view>
主要是将删除按钮的设为绝对定位(position: absolute)：
.item .remove{ width: 60px; height: 100%; background-color: red; position: absolute; top: 0; right: -60px; display: flex; justify-content: center; align-items: center; }
Page({ data: { cardTeams:[{"id":"aaaaa", "name":"android教程", "url":"http://www.see-source.com", "right":0, "startRight":0},{"id":"bbbb", "name":"小程序教程", "url":"http://www.see-source.com", "right":0, "startRight":0}] }, drawStart : function(e){ // console.log("drawStart"); var touch = e.touches[0]; startX = touch.clientX; startY = touch.clientY; var cardTeams = this.data.cardTeams; for(var i in cardTeams){ var data = cardTeams[i]; data.startRight = data.right; } key = true; }, drawEnd : function(e){ console.log("drawEnd"); var cardTeams = this.data.cardTeams; for(var i in cardTeams){ var data = cardTeams[i]; if(data.right <= 100/2){ data.right = 0; }else{ data.right = maxRight; } } this.setData({ cardTeams:cardTeams }); }, drawMove : function(e){ //console.log("drawMove"); var self = this; var dataId = e.currentTarget.id; var cardTeams = this.data.cardTeams; if(key){ var touch = e.touches[0]; endX = touch.clientX; endY = touch.clientY; console.log("startX="+startX+" endX="+endX ); if(endX - startX == 0) return ; var res = cardTeams; //从右往左 if((endX - startX) < 0){ for(var k in res){ var data = res[k]; if(res[k].id == dataId){ var startRight = res[k].startRight; var change = startX - endX; startRight += change; if(startRight > maxRight) startRight = maxRight; res[k].right = startRight; } } }else{//从左往右 for(var k in res){ var data = res[k]; if(res[k].id == dataId){ var startRight = res[k].startRight; var change = endX - startX; startRight -= change; if(startRight < 0) startRight = 0; res[k].right = startRight ; } } } self.setData({ cardTeams:cardTeams }); } }, //删除item delItem: function(e){ var dataId = e.target.dataset.id; console.log("删除"+dataId); var cardTeams = this.data.cardTeams; var newCardTeams = []; for(var i in cardTeams){ var item = cardTeams[i]; if(item.id != dataId){ newCardTeams.push(item); } } this.setData({ cardTeams:newCardTeams }); }, onLoad: function () { console.log('onLoad:'+app.globalData.domain) } })
drawStart用于记录手指触碰时的位置，drawMove记录手指滑动的位置，两者的差值就是删除按钮的偏移量
drawEnd手指抬起时触发，用于设置弹回、摊开效果。目前我的是超过一半自动弹开，不足一半自动收回。