uni-app长按删除

（1）在你要长按的盒子《标签》上添加如下代码

@touchstart.prevent="touchstart(index)"   @touchend.prevent="touchend"

（2）编写touchstart函数

touchstart(index) {
				let that = this;
				clearInterval(this.Loop); //再次清空定时器，防止重复注册定时器
				console.log(index)
				this.Loop = setTimeout(function() {
					uni.showModal({
						title: '删除',
						content: '请问要删除本条消息吗？',
						success: function(res) {
							if (res.confirm) {
								console.log(this.noticeList)
								//alert(this.noticeList[index].id)
								deleteNotify(that.noticeList[index].id, '0').then(res => {
									if (res.data.code == 1) {
										uni.showToast({
											title: '删除成功',
											duration: 2000
										})
										that.getnotify();
									}
								})
							} else if (res.cancel) {
								console.log('用户点击取消');
							}
						}
					});
				}.bind(this), 1000);
			},

（3）编写touchend函数

touchend() {
				console.log('结束')
				clearInterval(this.Loop);
			}