微信小程序滑动删除效果
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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)
-
- }
- })