微信小程序左滑修改删除 微信小程序实现左滑修改、删除功能
阡路陌人 人气:0wxml：
<view class="offer-item" wx:for-items='{{offerList}}'>
<!--这里绑定了刚才说的3个函数分别为 touchS，touchM touchE-->
<!--这里注意这个 style="{{item.txtStyle}}" ，这是我们一会再js中 将要设置的样式 -->
<view style="{{item.txtStyle}}">
<view class="offer-item-top fl clearfix" bindtouchstart="touchS" bindtouchmove="touchM" bindtouchend="touchE" data-index="{{index}}">
<navigator bindtap='navigatorTo' data-index="{{item.id}}">
<view class='content'>
<view class='title clearfix'>
<view class='fl'>
{{item.title}}党建项目报价表
</view>
<image src='../../images/right.png' class='fr'></image>
</view>
<view class='note clearfix'>
<view class='price fl'>
{{item.create_time}}
</view>
</view>
</view>
</navigator>
</view>
<!--这里是左滑按钮部分----start-->
<view bindtap="delItem" class='posit fr isMove' hidden='{{!item.isMove}}'>
<view class="ref" data-offerid="{{item.id}}" data-index="{{item.id}}" catchtap="ref">
<image src='../../images/ref.png'></image>
</view>
<view class="del" data-offerid="{{item.id}}" data-index="{{item.id}}" catchtap="del">
<image src='../../images/default.png'></image>
</view>
</view>
<!--这里是左滑按钮部分----end-->
</view>
</view>
wxss：
.offer-item {
height: 150rpx;
width: 100vw;
overflow-x: hidden;
border-bottom: 1px solid #f0f0f0;
}
.offer-item>view {
position: absolute;
/* width: calc(100% + 200rpx); */
height: 150rpx;
}
.offer-item .offer-item-top {
height: 100%;
}
.offer-item .offer-item-top navigator {
display: inline-block;
width: 100vw;
height: 100%;
}
.offer-item .content {
padding: 35rpx 30rpx;
position: relative;
height: calc(100% - 70rpx);
}
.offer-item .title .fl {
display: inline-block;
width: 78%;
overflow: hidden;
text-overflow: ellipsis;
white-space: nowrap;
font-size: 30rpx;
color: #333;
}
.offer-item .title .fr {
display: inline-block;
width: 20rpx;
height: 26rpx;
margin-top: 5rpx;
}
.offer-item .note {
position: absolute;
left: 30rpx;
bottom: 35rpx;
width: calc(100vw - 60rpx);
font-size: 24rpx;
color: #999;
}
.offer-item .posit {
width: 200rpx;
height: 150rpx;
line-height: 150rpx;
text-align: center;
display: none
}
.posit.isMove {
display: inline-block;
position: absolute;
}
.posit.isMove[hidden] {
display: none
}
.offer-item .posit>view {
display: inline-block;
width: 100rpx;
}
.offer-item .posit>view:first-of-type {
background-color: #FED847;
}
.offer-item .posit>view:last-of-type {
background-color: #C71B1B;
}
.offer-item .posit image {
display: inline-block;
width: 36rpx;
height: 36rpx;
}
js：
let len = 0; // 初次加载长度
let hadLastPage = false; // 判断是否到最后一页
var initdata = function (that) {
var list = that.data.offerList
for (var i = 0; i < list.length; i++) {
list[i].txtStyle = "";
list[i].isMove = false;
}
that.setData({
offerList: list
})
}
Page({
data: {
offerList: [
],
delBtnWidth: 100, // 删除按钮宽度单位（rpx）
},
// 手指刚放到屏幕触发
touchS: function (e) {
console.log("touchS" + e);
// initdata(this);
// 判断是否只有一个触摸点
if (e.touches.length == 1) {
this.setData({
// 记录触摸起始位置的X坐标
startX: e.touches[0].clientX
});
};
return false;
},
// 触摸时触发，手指在屏幕上每移动一次，触发一次
touchM: function (e) {
var that = this;
initdata(that);
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.offerList;
// 将拼接好的样式设置到当前item中
list[index].txtStyle = txtStyle;
list[index].isMove = true;
// 更新列表的状态
this.setData({
offerList: list
});
}
},
touchE: function (e) {
console.log( 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.offerList;
list[index].txtStyle = txtStyle;
// 更新列表的状态
that.setData({
offerList: list
});
}
},
/**
*
*/
navigatorTo: function (event) {
},
/**
* 删除操作
*/
del: function (e) {
var that = this;
var data = {
id: e.currentTarget.dataset.index
};
wx.showModal({
title: '',
content: '确定选择删除么？',
confirmColor: '#C71B1B',
cancelColor: '#666666',
success: function (res) {
if (res.confirm) {
utils.requestFun("接口url", data, 'POST', function (msg) {
console.log(msg)
wx.showToast({
title: '删除成功',
icon: 'success',
duration: 1500
})
var lists = that.data.offerList;
var list1 = [];
for (let i = 0; i < lists.length; i++) {
if (lists[i].id != e.currentTarget.dataset.index) {
list1.push(lists[i])
}
}
len--;
that.setData({
offerList: list1
})
})
} else if (res.cancel) {
}
}
})
},
/**
* 修改操作
*/
ref: function (e) {
wx.navigateTo({
url: '修改页面路径?id=' + e.currentTarget.dataset.index,
})
},
/**
* 生命周期函数--监听页面加载
*/
onLoad: function (options) {
page = 0;
this.loadList();
},
/**
* 生命周期函数--监听页面初次渲染完成
*/
onReady: function () {
},
/**
* 生命周期函数--监听页面显示
*/
onShow: function () {
},
/**
* 生命周期函数--监听页面隐藏
*/
onHide: function () {
},
/**
* 生命周期函数--监听页面卸载
*/
onUnload: function () {
hadLastPage = false;
len = 0;
},
/**
* 页面相关事件处理函数--监听用户下拉动作
*/
onPullDownRefresh: function () {
},
/**
* 页面上拉触底事件的处理函数
*/
onReachBottom: function (event) {
console.log("上拉事件")
this.loadList();
},
/**
* 数据请求封装
*/
loadList: function (event) {
if (hadLastPage != false) {
wx.showToast({
title: '到底啦',
});
return;
}
var that = this;
// 显示加载图标
wx.showLoading({
title: '玩命加载中',
})
let data = {
length: len,
openId: 'openid'
};
utils.requestFun("接口url", data, 'POST', function (msg) {
if (msg.data.length != 0) {
var lists = that.data.offerList;
for (let i = 0; i < msg.data.length; i++) {
msg.data[i].isMove = false;
lists.push(msg.data[i]);
}
// len
len = len + msg.data.length;
// 设置数据
that.setData({
offerList: lists
})
} else {
hadLastPage = true;
}
wx.hideLoading();
})
}
})
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