微信小程序长按事件

			longtap(type,id, index){
				this.cancelCollectforSchool(type,id, index);
			},

​
@click="previewImage(index)"

			/**
			 * 预览图片 
			 * */
			previewImage(index){
				let imgs = this.piclist.map( item =>{
					return item.url
				})
				uni.previewImage({
					urls: imgs,
					current:index
				});
			}

​