微信小程序滑动删除效果

来源：互联网发布：最近好看的网络自制剧编辑：程序博客网时间：2024/05/02 09:03

转自：看源社区 http://www.see-source.com/weixinwidget/detail.html?wid=80

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。

<view wx:for="{{cardTeams}}" wx:for-item="cardTeam" id="{{cardTeam.id}}" class="item" bindtouchstart="drawStart" bindtouchmove="drawMove" bindtouchend="drawEnd" style="right:{{cardTeam.right}}px">        <image class="img" src="http://img02.tooopen.com/images/20150928/tooopen_sy_143912755726.jpg" mode="scaleToFill"></image>        <view class="number-wrapper">          <text class="name">{{cardTeam.name}}</text>          <view class="count-wrapper">            <view class="decrease-btn">-</view>            <text class="count">1</text>            <view class="increase-btn">+</view>          </view>          <view class="price-wrapper">            <text class="unit">¥</text>            <text class="price">99.80</text>          </view>        </view>        <view class="ok"><view class="inner-ok">确定</view></view>        <view class="remove" data-id="{{cardTeam.id}}" bindtap="delItem"><view>删除</view></view>      </view>

主要是将删除按钮的设为绝对定位(position: absolute)：

.item .remove{    width: 60px;    height: 100%;    background-color: red;    position: absolute;    top: 0;    right: -60px;    display: flex;    justify-content: center;    align-items: center;}

Page({  data: {    cardTeams:[{"id":"aaaaa", "name":"android教程", "url":"http://www.see-source.com", "right":0, "startRight":0},{"id":"bbbb", "name":"小程序教程", "url":"http://www.see-source.com", "right":0, "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。

0 0