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							- <!-- z-paging -->
 
- <!-- github地址:https://github.com/SmileZXLee/uni-z-paging -->
 
- <!-- dcloud地址:https://ext.dcloud.net.cn/plugin?id=3935 -->
 
- <!-- 反馈QQ群:790460711 -->
 
- <!-- 滑动切换选项卡swiper-item,此组件支持easycom规范,可以在项目中直接引用 -->
 
- <template>
 
- 	<view class="zp-swiper-item-container">
 
- 		<z-paging ref="paging" :fixed="false" 
 
- 			:auto="false" :useVirtualList="useVirtualList" :useInnerList="useInnerList" :cellKeyName="cellKeyName" :innerListStyle="innerListStyle" 
 
- 			:preloadPage="preloadPage" :cellHeightMode="cellHeightMode" :virtualScrollFps="virtualScrollFps" :virtualListCol="virtualListCol"
 
- 			@query="_queryList" @listChange="_updateList">
 
- 			<slot />
 
- 			<template #header>
 
- 				<slot name="header"/>
 
- 			</template>
 
- 			<template #cell="{item,index}">
 
- 				<slot name="cell" :item="item" :index="index"/>
 
- 			</template>
 
- 			<template #footer>
 
- 				<slot name="footer"/>
 
- 			</template>
 
- 		</z-paging>
 
- 	</view>
 
- </template>
 
- <script>
 
- 	import zPaging from '../z-paging/z-paging'
 
- 	export default {
 
- 		name: "z-paging-swiper-item",
 
- 		components: { zPaging },
 
- 		data() {
 
- 			return {
 
- 				firstLoaded: false
 
- 			}
 
- 		},
 
- 		props: {
 
- 			// 当前组件的index,也就是当前组件是swiper中的第几个
 
- 			tabIndex: {
 
- 				type: Number,
 
- 				default: function() {
 
- 					return 0
 
- 				}
 
- 			},
 
- 			// 当前swiper切换到第几个index
 
- 			currentIndex: {
 
- 				type: Number,
 
- 				default: function() {
 
- 					return 0
 
- 				}
 
- 			},
 
- 			// 是否使用虚拟列表,默认为否
 
- 			useVirtualList: {
 
- 				type: Boolean,
 
- 				default: false
 
- 			},
 
- 			// 是否在z-paging内部循环渲染列表(内置列表),默认为否。若use-virtual-list为true,则此项恒为true
 
- 			useInnerList: {
 
- 				type: Boolean,
 
- 				default: false
 
- 			},
 
- 			// 内置列表cell的key名称,仅nvue有效,在nvue中开启use-inner-list时必须填此项
 
- 			cellKeyName: {
 
- 				type: String,
 
- 				default: ''
 
- 			},
 
- 			// innerList样式
 
- 			innerListStyle: {
 
- 				type: Object,
 
- 				default: function() {
 
- 					return {};
 
- 				}
 
- 			},
 
- 			// 预加载的列表可视范围(列表高度)页数,默认为12,即预加载当前页及上下各12页的cell。此数值越大,则虚拟列表中加载的dom越多,内存消耗越大(会维持在一个稳定值),但增加预加载页面数量可缓解快速滚动短暂白屏问题
 
- 			preloadPage: {
 
- 				type: [Number, String],
 
- 				default: 12
 
- 			},
 
- 			// 虚拟列表cell高度模式,默认为fixed,也就是每个cell高度完全相同,将以第一个cell高度为准进行计算。可选值【dynamic】,即代表高度是动态非固定的,【dynamic】性能低于【fixed】。
 
- 			cellHeightMode: {
 
- 				type: String,
 
- 				default: 'fixed'
 
- 			},
 
- 			// 虚拟列表列数,默认为1。常用于每行有多列的情况,例如每行有2列数据,需要将此值设置为2
 
- 			virtualListCol: {
 
- 				type: [Number, String],
 
- 				default: 1
 
- 			},
 
- 			// 虚拟列表scroll取样帧率,默认为60,过高可能出现卡顿等问题
 
- 			virtualScrollFps: {
 
- 				type: [Number, String],
 
- 				default: 60
 
- 			},
 
- 		},
 
- 		watch: {
 
- 			currentIndex: {
 
- 				handler(newVal, oldVal) {
 
- 					if (newVal === this.tabIndex) {
 
- 						// 懒加载,当滑动到当前的item时,才去加载
 
- 						if (!this.firstLoaded) {
 
- 							this.$nextTick(()=>{
 
- 								let delay = 5;
 
- 								// #ifdef MP-TOUTIAO
 
- 								delay = 100;
 
- 								// #endif
 
- 								setTimeout(() => {
 
- 									this.$refs.paging.reload().catch(() => {});
 
- 								}, delay);
 
- 							})
 
- 						}
 
- 					}
 
- 				},
 
- 				immediate: true
 
- 			}
 
- 		},
 
- 		methods: {
 
- 			reload(data) {
 
- 				return this.$refs.paging.reload(data);
 
- 			},
 
- 			complete(data) {
 
- 				this.firstLoaded = true;
 
- 				return this.$refs.paging.complete(data);
 
- 			},
 
- 			_queryList(pageNo, pageSize, from) {
 
- 				this.$emit('query', pageNo, pageSize, from);
 
- 			},
 
- 			_updateList(list) {
 
- 				this.$emit('updateList', list);
 
- 			}
 
- 		}
 
- 	}
 
- </script>
 
- <style scoped>
 
- 	.zp-swiper-item-container {
 
- 		/* #ifndef APP-NVUE */
 
- 		height: 100%;
 
- 		/* #endif */
 
- 		/* #ifdef APP-NVUE */
 
- 		flex: 1;
 
- 		/* #endif */
 
- 	}
 
- </style>
 
 
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