小程式實例：如何自訂下拉刷新

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自訂元件：

js:

// components/test/test.js
Component({
/**
* 组件的属性列表
*/
properties: {
 
},
 
/**
* 组件的初始数据
*/
data: {
scrollHeight: 0,
startY: 0,
tips: '下拉刷新',
isRefreshing: false
},
 
/**
* 组件的方法列表
*/
methods: {
end: function(e) {
if (this.data.isRefreshing) {
return
}
if (this.data.scrollHeight >= 50) {
this.setData({
scrollHeight: 50,
tips: '正在刷新',
isRefreshing: true
})
this.triggerEvent('onRefresh')
} else {
this.setData({
scrollHeight: 0,
tips: '下拉刷新'
})
}
},
move: function(e) {
if (this.data.isRefreshing) {
return
}
 
var that = this;
var moveY = e.touches[0].pageY;
var dY = moveY - that.data.startY;
console.log(dY);
if (dY >= 50 && dY <= 80) {
this.setData({
tips: &#39;松开加载&#39;,
scrollHeight: dY
})
} else if (dY > 80) {
this.setData({
tips: &#39;松开加载&#39;,
scrollHeight: 80
})
} else {
this.setData({
tips: &#39;下拉刷新&#39;,
scrollHeight: dY
})
}
 
},
 
start: function(e) {
this.data.startY = e.touches[0].pageY;
},
 
stopRefresh: function() {
this.setData({
isRefreshing: false,
scrollHeight: -50
})
},
}
})

wxml:

<!--components/test/test.wxml-->
<view class=&#39;loading-container&#39; bindtouchend=&#39;end&#39; bindtouchmove=&#39;move&#39; bindtouchstart=&#39;start&#39; style=&#39;margin-top:{{scrollHeight}}px;transform:translateY(-50px);&#39; >
<view class="weui-loadmore" style=&#39;margin:0 auto;padding:1.5em 0;&#39;>
<view class="weui-loading"></view>
<view class="weui-loadmore__tips">{{tips}}</view>
</view>
</view>

wxss:其中引用了weui 這個用不用都無所謂的很簡單的

@import '/pages/common/weui.wxss';
page{
height: 100%;
}
 
.loading-container{
height: 100%;
}

pages裡wxml：

<loadmore style=&#39;height:100%;&#39; bindonRefresh=&#39;onRefresh&#39; id=&#39;loadmore&#39;></loadmore>

js://刷新方法回呼

onRefresh: function() {
var that = this;
setTimeout(function(){
that.selectComponent("#loadmore").stopRefresh();
},3000)
},
json:
{
"enablePullDownRefresh": false,
"usingComponents":{
"loadmore":"../../components/test/test"
}
}

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