Implementation Guide for UniApp to Implement Takeaway Ordering and Delivery Tracking

UniApp Implementation Guide for Implementing Takeout Ordering and Delivery Tracking

Introduction:
With the rapid development of the takeout market, more and more people choose to order takeout and deliver it through mobile APP. It has brought more business opportunities and challenges to the catering industry. As a cross-platform development framework, UniApp can develop multi-platform applications quickly and efficiently. This article will introduce how to use UniApp to implement takeout ordering and delivery tracking functions, and attach relevant code examples.

1. Requirements Analysis

1. User login: Users need to log in to the APP through their mobile phone number or third-party account.
2. Takeaway ordering: Users can select and place orders for their favorite meals through the APP.
3. Shopping Cart Management: Users can add multiple meals to the shopping cart, and adjust and delete quantities.
4. Order payment: Users can pay for orders through the APP.
5. Order query: Users can query their orders, including historical orders and uncompleted orders.
6. Delivery tracking: Users can check the location and delivery progress of the delivery person in real time.

2. Technology selection

1. Front-end development: UniApp framework, Vue.js framework.
2. Back-end development: Node.js, Express framework.
3. Database: MongoDB.

3. Implementation steps

1. Create UniApp project
   Run the following command in the command line to create a UniApp project:

$ uni-create-project myApp

2. Writing front-end pages
   Create corresponding pages in the pages directory of UniApp, including login page, order page, shopping cart page, order page and delivery tracking page. At the same time, create the corresponding Vue file and write the code for the front-end page.
3. Implement user login function
   On the login page, users can enter their mobile phone number and password to log in. Send a login request to the backend by calling the uni.request() function.

uni.request({
  url: 'http://yourbackend.com/login',
  data: {
    phone: '手机号',
    password: '密码'
  },
  success: (res) => {
    if (res.data.code === 200) {
      // 登录成功
      uni.showToast({
        title: '登录成功',
        icon: 'success',
        duration: 2000
      })
      // 将登录状态保存到本地缓存
      uni.setStorageSync('token', res.data.token)
    } else {
      // 登录失败
      uni.showToast({
        title: '登录失败',
        icon: 'none',
        duration: 2000
    })
  }
})

4. Implementing takeout ordering function
   On the ordering page, users can slide to select the dishes, quantity and remarks, and then click the confirm order button. Send an order request to the backend by calling the uni.request() function.

uni.request({
  url: 'http://yourbackend.com/order',
  method: 'POST',
  header: {
    'Authorization': 'Bearer ' + uni.getStorageSync('token')
  },
  data: {
    food: '订购的菜品',
    quantity: '订购的数量',
    remark: '备注信息'
  },
  success: (res) => {
    if (res.data.code === 200) {
      // 下单成功
      uni.showToast({
        title: '下单成功',
        icon: 'success',
        duration: 2000
      })
    } else {
      // 下单失败
      uni.showToast({
        title: '下单失败',
        icon: 'none',
        duration: 2000
      })
    }
  }
})

5. Implement shopping cart management function
   On the shopping cart page, users can view the list of meals in the shopping cart, and adjust and delete the quantity. Send the shopping cart operation request to the backend by calling the uni.request() function.

// 增加购物车中的餐品数量
uni.request({
  url: 'http://yourbackend.com/cart/add',
  method: 'POST',
  header: {
    'Authorization': 'Bearer ' + uni.getStorageSync('token')
  },
  data: {
    food: '菜品名称',
    quantity: '数量'
  },
  success: (res) => {
    if (res.data.code === 200) {
      // 添加成功
      uni.showToast({
        title: '添加成功',
        icon: 'success',
        duration: 2000
      })
    } else {
      // 添加失败
      uni.showToast({
        title: '添加失败',
        icon: 'none',
        duration: 2000
      })
    }
  }
})

// 删除购物车中的餐品
uni.request({
  url: 'http://yourbackend.com/cart/delete',
  method: 'POST',
  header: {
    'Authorization': 'Bearer ' + uni.getStorageSync('token')
  },
  data: {
    food: '菜品名称'
  },
  success: (res) => {
    if (res.data.code === 200) {
      // 删除成功
      uni.showToast({
        title: '删除成功',
        icon: 'success',
        duration: 2000
      })
    } else {
      // 删除失败
      uni.showToast({
        title: '删除失败',
        icon: 'none',
        duration: 2000
      })
    }
  }
})

6. Implement order payment function
   On the order page, users can choose the payment method and complete the payment of the order. Payment is made by calling the uni.requestPayment() function.

uni.requestPayment({
  provider: 'wxpay',
  orderInfo: '支付订单的信息',
  success: (res) => {
    // 支付成功
    uni.showToast({
      title: '支付成功',
      icon: 'success',
      duration: 2000
    })
  },
  fail: (res) => {
    // 支付失败
    uni.showToast({
      title: '支付失败',
      icon: 'none',
      duration: 2000
    })
  }
})

7. Implement order query function
   On the order page, users can query their historical orders and uncompleted orders. Send an order query request to the backend by calling the uni.request() function.

uni.request({
  url: 'http://yourbackend.com/orders',
  method: 'GET',
  header: {
    'Authorization': 'Bearer ' + uni.getStorageSync('token')
  },
  success: (res) => {
    if (res.data.code === 200) {
      // 查询成功
      const orders = res.data.orders
      // TODO: 处理订单数据
    } else {
      // 查询失败
      uni.showToast({
        title: '查询失败',
        icon: 'none',
        duration: 2000
      })
    }
  }
})

8. Implement delivery tracking function
   On the delivery tracking page, users can view the location and delivery progress of the delivery person in real time. Obtain the location information of the delivery person by accessing the map API.

// 获取配送员的位置信息
uni.getLocation({
  success: (res) => {
    const latitude = res.latitude
    const longitude = res.longitude
    // TODO: 显示配送员位置
  },
  fail: (res) => {
    uni.showToast({
      title: '获取位置信息失败',
      icon: 'none',
      duration: 2000
    })
  }
})

4. Summary
This article introduces how to use the UniApp framework to implement takeout ordering and delivery tracking functions, and attaches relevant code examples. Through UniApp's cross-platform features, we can quickly develop multi-platform takeout ordering applications to provide users with more convenient takeout ordering services. At the same time, it also brings more business opportunities and competitiveness to the catering industry. I believe that through the guide in this article, readers can quickly get started developing takeout ordering and delivery tracking functions, and provide users with a better experience.

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