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import { ref } from 'vue';
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// 小程序无法在hook中使用页面级别生命周期,需单独传入: https://ask.dcloud.net.cn/question/161173
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// import { onPageScroll, onReachBottom, onPullDownRefresh} from '@dcloudio/uni-app';
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/**
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* mescroll-body写在子组件时,需通过useMescrollComp补充子组件缺少的生命周期, 相当于vue2的mescroll-comp.js文件
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* 必须传入onPageScroll, onReachBottom
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* 当down.native为true时,需传入onPullDownRefresh
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*/
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function useMescrollComp(onPageScroll, onReachBottom, onPullDownRefresh){
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// 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
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onPageScroll(e=>{
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handlePageScroll(e)
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})
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onReachBottom(()=>{
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handleReachBottom()
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})
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// 当down的native: true时, 还需传递此方法进到子组件
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onPullDownRefresh && onPullDownRefresh(()=>{
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handlePullDownRefresh()
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})
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const mescrollItem = ref(null)
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const handlePageScroll = (e)=>{
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const mescroll = getMescroll()
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mescroll && mescroll.onPageScroll(e);
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}
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const handleReachBottom = ()=>{
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const mescroll = getMescroll()
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mescroll && mescroll.onReachBottom();
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}
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const handlePullDownRefresh = ()=>{
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const mescroll = getMescroll()
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mescroll && mescroll.onPullDownRefresh();
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}
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const getMescroll = ()=>{
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if(mescrollItem.value && mescrollItem.value.getMescroll){
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return mescrollItem.value.getMescroll()
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}
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return null
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}
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return {
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mescrollItem,
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getMescroll
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}
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}
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export default useMescrollComp |