小程序左滑删除
直接上代码
界面:
<scroll-view class="scroll-wpper">
<view wx:for="{{collections}}" class="recommended-coner-wpper" id='{{item.objectId}}'>
<view bindtouchstart="touchS" bindtouchmove="touchM" bindtouchend="touchE" data-index="{{index}}" style="{{item.txtStyle}}" id='{{item.objectId}}' class="list_del txt" bindtap='gamedetails'>//这段是重点 设置触点 设置左滑动作
<view class="lime-ico">
<image class="ico" src='{{item.pic}}'></image>
</view>
<view class="coner-wpper">
<view class="coner-liem">{{item.name}}</view>
<view class="species-wpper">
<view class="age">{{item.ageName}}</view>
<view class="species-type">{{item.typeName}}</view>
<view class="species-type-coner">{{item.detailDesc}}</view>
</view>
</view>
</view>
<view data-index="{{index}}" bindtap="delItem" id="{{item.objectId}}" class="list_del del">
<image src='{{del}}' class='del_icon' />
</view>//删除按钮
</view>
</scroll-view>
js:
//左滑删除
touchS: function(e) {
console.log(e)
if (e.touches.length == 1) {
this.setData({ //设置触摸起始点水平方向位置
startX: e.touches[0].clientX
});
}
},
touchM: function(e) {
var that = this
if (e.touches.length == 1) {
//记录触摸点位置的X坐标
var moveX = e.touches[0].clientX;
//计算手指起始点的X坐标与当前触摸点的X坐标的差值
var disX = that.data.startX - moveX;
//delBtnWidth 为右侧按钮区域的宽度
var delBtnWidth = that.data.delBtnWidth;
var txtStyle = "";
if (disX == 0 || disX < 0) { //如果移动距离小于等于0,文本层位置不变
txtStyle = "left:0px";
} else if (disX > 0) { //移动距离大于0,文本层left值等于手指移动距离
txtStyle = "left:-" + disX + "px";
if (disX >= delBtnWidth) {
//控制手指移动距离最大值为删除按钮的宽度
txtStyle = "left:-" + delBtnWidth + "px";
}
}
//获取手指触摸的是哪一个item
var index = e.currentTarget.dataset.index;
var list = that.data.collections;
//将拼接好的样式设置到当前item中
list[index].txtStyle = txtStyle;
//更新列表的状态
this.setData({
collections: list
});
}
},
touchE: function(e) {
console.log("touchE" + e);
var that = this
if (e.changedTouches.length == 1) {
//手指移动结束后触摸点位置的X坐标
var endX = e.changedTouches[0].clientX;
//触摸开始与结束,手指移动的距离
var disX = that.data.startX - endX;
var delBtnWidth = that.data.delBtnWidth;
//如果距离小于删除按钮的1/2,不显示删除按钮
var txtStyle = disX > delBtnWidth / 2 ? "left:-" + delBtnWidth + "px" : "left:0px";
//获取手指触摸的是哪一项
var index = e.currentTarget.dataset.index;
var list = that.data.collections;
list[index].txtStyle = txtStyle;
//更新列表的状态
that.setData({
collections: list
});
}
},
打完收工,下次直接上cv操作