首先把布局写好，根据自己的需求编写，html代码部分：
<view class="container">
<view class="touch-item {{item.isTouchMove ? 'touch-move-active' : ''}}" data-index="{{index}}" bindtouchstart="touchstart" bindtouchmove="touchmove" wx:for="{{items}}" wx:key="">
<view class="content">{{item.content}}</view>
<view class="del" catchtap="del" data-index="{{index}}">删除</view>
</view>
</view>
CSS代码部分：
page {background-color: white;}
.container {min-height: 100%;padding: 20rpx 0rpx;}
.touch-item {font-size: 14px;display: flex;justify-content: space-between;border-bottom:1px solid #ccc;width: 100%;overflow: hidden}
.content {
width: 100%;
padding: 10px;
line-height: 22px;
margin-right:0;
-webkit-transition: all 0.4s;
transition: all 0.4s;
-webkit-transform: translateX(90px);
transform: translateX(90px);
margin-left: -90px
}
.del {
background-color: orangered;
width: 90px;
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
color: #fff;
-webkit-transform: translateX(90px);
transform: translateX(90px);
-webkit-transition: all 0.4s;
transition: all 0.4s;
}
.touch-move-active .content,
.touch-move-active .del {-webkit-transform: translateX(0);transform: translateX(0);}
js代码部分：
触发滑动事件，需要计算的哦，代码有注释，小哥哥小姐姐们慢慢欣赏拉
Page({
data: {
items: [],
startX: 0, //开始坐标
startY: 0
},
onLoad: function (e) {
var that = this;
//common是自己写的公共JS方法，可忽略
common.sys_main(app, that, e);
for (var i = 0; i < 10; i++) {
this.data.items.push({
content: i + " 向左滑动删除哦,向左滑动删除哦,向左滑动删除哦,向左滑动删除哦,向左滑动删除哦",
isTouchMove: false //默认隐藏删除
})
}
this.setData({
items: this.data.items
});
}
,
//手指触摸动作开始 记录起点X坐标
touchstart: function (e) {
//开始触摸时 重置所有删除
this.data.items.forEach(function (v, i) {
if (v.isTouchMove)//只操作为true的
v.isTouchMove = false;
})
this.setData({
startX: e.changedTouches[0].clientX,
startY: e.changedTouches[0].clientY,
items: this.data.items
})
},
//滑动事件处理
touchmove: function (e) {
var that = this;
index = e.currentTarget.dataset.index;//当前索引
startX = that.data.startX;//开始X坐标
startY = that.data.startY;//开始Y坐标
touchMoveX = e.changedTouches[0].clientX;//滑动变化坐标
touchMoveY = e.changedTouches[0].clientY;//滑动变化坐标
//获取滑动角度
angle = that.angle({ X: startX, Y: startY }, { X: touchMoveX, Y: touchMoveY });
that.data.items.forEach(function (v, i) {
v.isTouchMove = false
//滑动超过30度角 return
if (Math.abs(angle) > 30) return;
if (i == index) {
if (touchMoveX > startX) //右滑
v.isTouchMove = false
else //左滑
v.isTouchMove = true
}
})
//更新数据
that.setData({
items: that.data.items
})
},
/**
* 计算滑动角度
* @param {Object} start 起点坐标
* @param {Object} end 终点坐标
*/
angle: function (start, end) {
var _X = end.X - start.X,
_Y = end.Y - start.Y
//返回角度 /Math.atan()返回数字的反正切值
return 360 * Math.atan(_Y / _X) / (2 * Math.PI);
},
//删除事件
del: function (e) {
this.data.items.splice(e.currentTarget.dataset.index, 1)
this.setData({
items: this.data.items
})
}
})
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