下拉刷新和上拉加载 php,怎样操作vue2.0 移动端实现下拉刷新和上拉加载
這次給大家帶來怎樣操作vue2.0 移動端實現下拉刷新和上拉加載，操作vue2.0 移動端實現下拉刷新和上拉加載的注意事項有哪些，下面就是實戰案例，一起來看一下。
直接上代碼，不懂的多看幾遍，下面我換會告訴大家如何使用。
:class="{'down':(state===0),'up':(state==1),refresh:(state===2),touch:touching}"
@touchstart="touchStart($event)"
@touchmove="touchMove($event)"
@touchend="touchEnd($event)"
@scroll="(onInfinite || infiniteLoading) ? onScroll($event) : undefined">
下拉更新
松開更新
更新中
加載中……
export default {
props: {
offset: {
type: Number,
default: 40
},
enableInfinite: {
type: Boolean,
default: true
},
enableRefresh: {
type: Boolean,
default: true
},
onRefresh: {
type: Function,
default: undefined,
required: false
},
onInfinite: {
type: Function,
default: undefined,
require: false
}
},
data() {
return {
top: 0,
state: 0,
startY: 0,
touching: false,
infiniteLoading: false
}
},
methods: {
touchStart(e) {
this.startY = e.targetTouches[0].pageY
this.startScroll = this.$el.scrollTop || 0
this.touching = true
},
touchMove(e) {
if (!this.enableRefresh || this.$el.scrollTop > 0 || !this.touching) {
return
}
let diff = e.targetTouches[0].pageY - this.startY - this.startScroll
if (diff > 0) e.preventDefault()
this.top = Math.pow(diff, 0.8) + (this.state === 2 ? this.offset : 0)
if (this.state === 2) { // in refreshing
return
}
if (this.top >= this.offset) {
this.state = 1
} else {
this.state = 0
}
},
touchEnd(e) {
if (!this.enableRefresh) return
this.touching = false
if (this.state === 2) { // in refreshing
this.state = 2
this.top = this.offset
return
}
if (this.top >= this.offset) { // do refresh
this.refresh()
} else { // cancel refresh
this.state = 0
this.top = 0
}
},
refresh() {
this.state = 2
this.top = this.offset
this.onRefresh(this.refreshDone)
},
refreshDone() {
this.state = 0
this.top = 0
},
infinite() {
this.infiniteLoading = true
this.onInfinite(this.infiniteDone)
},
infiniteDone() {
this.infiniteLoading = false
},
onScroll(e) {
if (!this.enableInfinite || this.infiniteLoading) {
return
}
let outerHeight = this.$el.clientHeight
let innerHeight = this.$el.querySelector('.inner').clientHeight
let scrollTop = this.$el.scrollTop
let ptrHeight = this.onRefresh ? this.$el.querySelector('.pull-refresh').clientHeight : 0
let infiniteHeight = this.$el.querySelector('.load-more').clientHeight
let bottom = innerHeight - outerHeight - scrollTop - ptrHeight
if (bottom < infiniteHeight) this.infinite()
}
}
}
.yo-scroll {
position: absolute;
top: 2.5rem;
right: 0;
bottom: 0;
left: 0;
overflow: auto;
-webkit-overflow-scrolling: touch;
background-color: #ddd
}
.yo-scroll .inner {
position: absolute;
top: -2rem;
width: 100%;
transition-duration: 300ms;
}
.yo-scroll .pull-refresh {
position: relative;
left: 0;
top: 0;
width: 100%;
height: 2rem;
display: flex;
align-items: center;
justify-content: center;
}
.yo-scroll.touch .inner {
transition-duration: 0ms;
}
.yo-scroll.down .down-tip {
display: block;
}
.yo-scroll.up .up-tip {
display: block;
}
.yo-scroll.refresh .refresh-tip {
display: block;
}
.yo-scroll .down-tip,
.yo-scroll .refresh-tip,
.yo-scroll .up-tip {
display: none;
}
.yo-scroll .load-more {
height: 3rem;
display: flex;
align-items: center;
justify-content: center;
}
把上面組件拷貝一下，存成后綴是.vue的組件放到你的component下， 然后引入到頁面 , 下面是我引用的demo
上代碼： 里面有注釋哦，有問題給我留言！
- {{item.name}}
- {{item.name}}
import Scroll from './y-scroll/scroll';
export default{
data () {
return {
counter : 1, //默認已經顯示出15條數據 count等于一是讓從16條開始加載
num : 15, // 一次顯示多少條
pageStart : 0, // 開始頁數
pageEnd : 0, // 結束頁數
listdata: [], // 下拉更新數據存放數組
downdata: [] // 上拉更多的數據存放數組
}
},
mounted : function(){
this.getList();
},
methods: {
getList(){
let vm = this;
vm.$http.get('https://api.github.com/repos/typecho-fans/plugins/contents/').then((response) => {
vm.listdata = response.data.slice(0,15);
}, (response) => {
console.log('error');
});
},
onRefresh(done) {
this.getList();
done() // call done
},
onInfinite(done) {
let vm = this;
vm.$http.get('https://api.github.com/repos/typecho-fans/plugins/contents/').then((response) => {
vm.counter++;
vm.pageEnd = vm.num * vm.counter;
vm.pageStart = vm.pageEnd - vm.num;
let arr = response.data;
let i = vm.pageStart;
let end = vm.pageEnd;
for(; i
let obj ={};
obj["name"] = arr[i].name;
vm.downdata.push(obj);
if((i + 1) >= response.data.length){
this.$el.querySelector('.load-more').style.display = 'none';
return;
}
}
done() // call done
}, (response) => {
console.log('error');
});
}
},
components : {
'v-scroll': Scroll
}
}
相信看了本文案例你已經掌握了方法，更多精彩請關注php中文網其它相關文章！
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