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75 lines
2.4 KiB
JavaScript

/**
* mescroll-body写在子组件时, 需通过mescroll的mixins补充子组件缺少的生命周期
*/
const MescrollMoreMixin = {
data() {
return {
tabIndex: 0, // 当前tab下标
mescroll: {
onPageScroll: e=>{
this.handlePageScroll(e)
},
onReachBottom: ()=>{
this.handleReachBottom()
},
onPullDownRefresh: ()=>{
this.handlePullDownRefresh()
}
}
}
},
// 因为子组件无onPageScroll和onReachBottom的页面生命周期需在页面传递进到子组件
onPageScroll(e) {
this.handlePageScroll(e)
},
onReachBottom() {
this.handleReachBottom()
},
// 当down的native: true时, 还需传递此方法进到子组件
onPullDownRefresh(){
this.handlePullDownRefresh()
},
methods:{
handlePageScroll(e){
let mescroll = this.getMescroll(this.tabIndex);
mescroll && mescroll.onPageScroll(e);
},
handleReachBottom(){
let mescroll = this.getMescroll(this.tabIndex);
mescroll && mescroll.onReachBottom();
},
handlePullDownRefresh(){
let mescroll = this.getMescroll(this.tabIndex);
mescroll && mescroll.onPullDownRefresh();
},
// 根据下标获取对应子组件的mescroll
getMescroll(i){
if(!this.mescrollItems) this.mescrollItems = [];
if(!this.mescrollItems[i]) {
// v-for中的refs
let vForItem = this.$refs["mescrollItem"];
if(vForItem){
this.mescrollItems[i] = vForItem[i]
}else{
// 普通的refs,不可重复
this.mescrollItems[i] = this.$refs["mescrollItem"+i];
}
}
let item = this.mescrollItems[i]
return item ? item.mescroll : null
},
// 切换tab,恢复滚动条位置
tabChange(i){
let mescroll = this.getMescroll(i);
if(mescroll){
// 延时(比$nextTick靠谱一些),确保元素已渲染
setTimeout(()=>{
mescroll.scrollTo(mescroll.getScrollTop(),0)
},30)
}
}
}
}
export default MescrollMoreMixin;