uni多选框的获取和删除值的方法

uni多选框的获取和删除值的方法

<template>
	<view class="page ">
		<scroll-view class="scrollList" scroll-y :scroll-into-view="scrollViewId" :style="{height:winHeight + 'px'}">
			<view class="uni-list">
				<block v-for="(list, key) in lists" :key="key">
					<block v-if="list.data.length">
						<view class="uni-list-cell-divider" :id="list.letter">
							{{list.letter}}
						</view>
						<view class="uni-list-cell" hover-class="uni-list-cell-hover" v-for="(item,index) in list.data" :key="item"
						 :class="list.data.length -1 == index ? 'uni-list-cell-last' : ''">
							<checkbox-group>
								<view class="uni-list-cell-navigate ">
									<view>
										<checkbox :value="item" :checked="item.checked" @tap='checkboxs(item)' />
									</view>
									<view class="list-left">
										{{item}}
									</view>
									<view class="list-left font-color">
										{{gender}} {{studentID}}
									</view>
									<!-- <view class="uni-list-cell-navigate font-color" >
									{{gender}} {{studentID}}
								</view> -->
								</view>
							</checkbox-group>
						</view>
					</block>
				</block>
			</view>
		</scroll-view>
		<view class="uni-indexed-list-bar" :class="touchmove ? 'active' : ''" @touchstart="touchStart" @touchmove="touchMove"
		 @touchend="touchEnd" @touchcancel="touchCancel" :style="{height:winHeight + 'px'}">
			<text v-for="(list,key) in lists" :key="key" class="uni-indexed-list-text" :class="touchmoveIndex == key ? 'active' : ''"
			 :style="{height:itemHeight + 'px',lineHeight:itemHeight + 'px'}">{{list.letter}}</text>
		</view>
		<view class="uni-indexed-list-alert" v-if="touchmove">
			{{lists[touchmoveIndex].letter}}
		</view>
		<fab @tap='add'></fab>
	</view>
</template>

<script>
	import fab from '@/components/fab/fab.vue'
	var airportDate = require("@/common/js/airport.js");
	export default {
		components: {
			fab
		},
		data() {
			return {
				title: 'grid',
				lists: airportDate.list,
				touchmove: false,
				touchmoveIndex: -1,
				itemHeight: 0,
				winHeight: 0,
				scrollViewId: "A",
				titleHeight: 0,
				gender: '男',
				studentID: '12015245066',
				select_list_data: []
			}
		},
		onLoad() {
			let winHeight = uni.getSystemInfoSync().windowHeight;
			this.itemHeight = winHeight / 26;
			this.winHeight = winHeight;
			// this.lists.forEach(item => {
			// 	item.data.forEach(list => {
			// 		// list.checked = false;
			// 		console.log(list)
			// 	})
			// });
		},
		methods: {
			add() {
				var that = this
				console.log(that.arr)
				uni.navigateTo({
					url: '/view/teacher/teacherReason'
				});
			},
			//多选框获取值和删除值的方法
			checkboxs(e) {
				console.log('checkboxs e:', e)
				var that = this
				console.log('that.select_list_data:', that.select_list_data)
				//添加 不重复的
				Array.prototype.pushNoRepeat = function(){
					for(var i=0; i<arguments.length; i++){
						var ele = arguments[i];
						if(this.indexOf(ele) == -1){
							this.push(ele);
						}
					}
				};
				//自定义删除函数: 下标
				Array.prototype.remove=function(dx)
				{
					if(isNaN(dx)||dx>this.length){return false;}
					for(var i=0,n=0;i<this.length;i++)
					{
						if(this[i]!=this[dx])
						{
							this[n++]=this[i]
						}
					}
					this.length-=1
				};
				if(that.select_list_data.length === 0){
					that.select_list_data.pushNoRepeat(e);
					return;
				}
				var select_list_data_temp = that.select_list_data;
					select_list_data_temp.forEach(function(value, i) {
						console.log("i", i);
						console.log("value", value);
						if (value === e) {
							console.log("删除");
							select_list_data_temp.remove(i);
						}else{
							select_list_data_temp.pushNoRepeat(e);
						}
					});
					that.select_list_data = select_list_data_temp;
			},

			//==============uni内置方法=====================
			touchStart(e) {
				this.touchmove = true;
				let pageY = e.touches[0].pageY;
				let index = Math.floor((pageY - this.titleHeight) / this.itemHeight);
				let item = this.lists[index];
				if (item) {
					this.scrollViewId = item.letter;
					this.touchmoveIndex = index;
				}
			},
			touchMove(e) {
				let pageY = e.touches[0].pageY;
				let index = Math.floor((pageY - this.titleHeight) / this.itemHeight);
				let item = this.lists[index];
				if (item) {
					this.scrollViewId = item.letter;
					this.touchmoveIndex = index;
				}
			},
			touchEnd() {
				this.touchmove = false;
				this.touchmoveIndex = -1;
			},
			touchCancel() {
				this.touchmove = false;
				this.touchmoveIndex = -1;
			}
		}
	}
</script>

<style>
	.page {
		display: flex;
		flex-direction: row;
	}

	.scrollList {
		flex: 1;
		height: 100vh;
	}

	.uni-indexed-list-bar {
		width: 46upx;
		height: 100vh;
		background-color: lightgrey;
		display: flex;
		flex-direction: column;
	}

	.uni-indexed-list-bar.active {
		background-color: rgb(200, 200, 200);
	}

	.uni-indexed-list-text {
		color: #aaa;
		font-size: 22upx;
		text-align: center;
	}

	.uni-indexed-list-bar.active .uni-indexed-list-text {
		color: #333;
	}

	.uni-indexed-list-text.active,
	.uni-indexed-list-bar.active .uni-indexed-list-text.active {
		color: #007AFF;
	}

	.uni-indexed-list-alert {
		position: absolute;
		z-index: 20;
		width: 160upx;
		height: 160upx;
		left: 50%;
		top: 50%;
		margin-left: -80upx;
		margin-top: -80upx;
		border-radius: 80upx;
		text-align: center;
		line-height: 160upx;
		font-size: 70upx;
		color: #fff;
		background-color: rgba(0, 0, 0, 0.5);
	}

	.list-left {
		width: 100%;
		/* line-height:44upx; */
		text-align: left;
	}
</style>

标签：flex,删除,color,text,list,indexed,uni,选框
来源： https://blog.csdn.net/weixin_44745330/article/details/98031975