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。
主要是将删除按钮的设为绝对定位(position: absolute)：
小程序教程","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。
