首先把布局寫好，根據(jù)自己的需求編寫，html代碼部分：
<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}}">刪除</view>
</view>
</view>
CSS代碼部分：
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代碼部分：
觸發(fā)滑動(dòng)事件，需要計(jì)算的哦，代碼有注釋，小哥哥小姐姐們慢慢欣賞拉
Page({
data: {
items: [],
startX: 0, //開始坐標(biāo)
startY: 0
},
onLoad: function (e) {
var that = this;
//common是自己寫的公共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 + " 向左滑動(dòng)刪除哦,向左滑動(dòng)刪除哦,向左滑動(dòng)刪除哦,向左滑動(dòng)刪除哦,向左滑動(dòng)刪除哦",
isTouchMove: false //默認(rèn)隱藏刪除
})
}
this.setData({
items: this.data.items
});
}
,
//手指觸摸動(dòng)作開始 記錄起點(diǎn)X坐標(biāo)
touchstart: function (e) {
//開始觸摸時(shí) 重置所有刪除
this.data.items.forEach(function (v, i) {
if (v.isTouchMove)//只操作為true的
v.isTouchMove = false;
})
this.setData({
startX: e.changedTouches[0].clientX,
startY: e.changedTouches[0].clientY,
items: this.data.items
})
},
//滑動(dòng)事件處理
touchmove: function (e) {
var that = this;
index = e.currentTarget.dataset.index;//當(dāng)前索引
startX = that.data.startX;//開始X坐標(biāo)
startY = that.data.startY;//開始Y坐標(biāo)
touchMoveX = e.changedTouches[0].clientX;//滑動(dòng)變化坐標(biāo)
touchMoveY = e.changedTouches[0].clientY;//滑動(dòng)變化坐標(biāo)
//獲取滑動(dòng)角度
angle = that.angle({ X: startX, Y: startY }, { X: touchMoveX, Y: touchMoveY });
that.data.items.forEach(function (v, i) {
v.isTouchMove = false
//滑動(dòng)超過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
}
})
//更新數(shù)據(jù)
that.setData({
items: that.data.items
})
},
/**
* 計(jì)算滑動(dòng)角度
* @param {Object} start 起點(diǎn)坐標(biāo)
* @param {Object} end 終點(diǎn)坐標(biāo)
*/
angle: function (start, end) {
var _X = end.X - start.X,
_Y = end.Y - start.Y
//返回角度 /Math.atan()返回?cái)?shù)字的反正切值
return 360 * Math.atan(_Y / _X) / (2 * Math.PI);
},
//刪除事件
del: function (e) {
this.data.items.splice(e.currentTarget.dataset.index, 1)
this.setData({
items: this.data.items
})
}
})
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