data() {
			return {
				title: 'Hello',
				bannerlist:[],
				age:[],
				new_shelf:[],
				 btnnum: 0,
				 borrow_list:[],
				 general_list:[],
			}
		},
		onLoad() {
			
		},
		onShow() {
			this.getInfo();
		},
		methods: {
			getInfo(){
				uni.request({
					url: 'https://book.xg360.cc/api/index/index', 
					data: {
					  
					},
					header: {
						'hash':'ysdbk' //自定义请求头信息
					},
					success: (res) => {
						
						this.bannerlist = res.data.data.banner;
						this.age = res.data.data.age;
						this.new_shelf=res.data.data.new_arrival;
						this.borrow_list=res.data.data.borrow_list;
						this.general_list=res.data.data.general_list;
						console.log(this.bannerlist);
					}
				});
			},
			change(e) {
			      this.btnnum = e
			      console.log(this.btnnum)
			  },
		}

显示的时候在onshow里面显示