wechat-weapp-demo.zip

var app = getApp() Page({ data: { hidden:false, curNav:1, curIndex:0, cart:[], cartTotal:0, navList:[ { id:1, name:'热销菜品' }, { id:2, name:'热菜' }, { id:3, name:'凉菜' }, { id:4, name:'套餐' } ], dishesList:[ [ { name:"红烧肉", price:38, num:1, id:1 }, { name:"宫保鸡丁", price:58, num:1, id:29 }, { name:"水煮鱼", price:88, num:1, id:2 } ], [ { name:"小炒日本豆腐", price:18, num:1, id:3 }, { name:"烤鱼", price:58, num:1, id:4 } ], [ { name:"大拌菜", price:18, num:1, id:5 }, { name:"川北凉粉", price:8, num:1, id:6 } ], [] ], dishes:[] }, loadingChange () { setTimeout(() => { this.setData({ hidden:true }) },2000) }, selectNav (event) { let id = event.target.dataset.id, index = parseInt(event.target.dataset.index); self = this; this.setData({ curNav:id, curIndex:index }) }, // 选择菜品 selectDish (event) { let dish = event.currentTarget.dataset.dish; let flag = true; let cart = this.data.cart; if(cart.length > 0){ cart.forEach(function(item,index){ if(item == dish){ cart.splice(index,1); flag = false; } }) } if(flag) cart.push(dish); this.setData({ cartTotal:cart.length }) this.setStatus(dish) }, setStatus (dishId) { let dishes = this.data.dishesList; for (let dish of dishes){ dish.forEach((item) => { if(item.id == dishId){ item.status = !item.status || false } }) } this.setData({ dishesList:this.data.dishesList }) }, onLoad () { this.loadingChange() } })