ios - Firebase 数据库结构

Question

我正在开发一个有关餐厅的应用程序。 但 Firebase 数据库结构存在一些问题。 我的代码的数据库结构是这样的:

restaurants {
             AutoID {
                      name: "nnnnn",
                      phone:"88888888" }
             AutoID {
                      name: "nnnnn",
                      phone:"88888888" }
             image {
                    AutoID: URL
                    AutoID: URL }
}

如何将结构更改为这样:

restaurants {
             AutoID {
                      name: "nnnnn",
                      phone:"88888888",
                      image: URL }
             AutoID {
                      name: "nnnnn",
                      phone:"88888888",
                      image: URL }

当前代码是:

@IBAction func saveButton(_ sender: Any)
{
    addRestaurant()
}

func addRestaurant()
{
    ref = FIRDatabase.database().reference().child("restaurants")

    let key = ref?.childByAutoId().key

    let name = addName.text

    let phone = addPhone.text

    ref?.child(key!).setValue(["name": name, "phone": phone])

}

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any])
{
    let image = info[UIImagePickerControllerOriginalImage] as? UIImage

    addImage.image = image

    var data = Data()
    data = UIImagePNGRepresentation(image!)!

    let uniqueName = NSUUID().uuidString
    let imageRef = FIRStorage.storage().reference().child("restaurantImage").child("\(uniqueName)")
    imageRef.put(data, metadata: nil).observe(.success){(snapshot) in
        let downloadURL = snapshot.metadata?.downloadURL()?.absoluteString
        let imageDBRef = FIRDatabase.database().reference().child("restaurants/image")
        let key = imageDBRef.childByAutoId().key
        imageDBRef.child(key).setValue(downloadURL)
    }
    self.dismiss(animated: true, completion: nil)
}

非常感谢!

Answer 1

正如您所说，您首先将图像存储在 FIRStorage 中，然后添加 name 和 phone 您需要做的是在闭包内imageRef 您需要存储所存储图像 URL 的引用，因此在 Controller 中声明一个实例属性并将其设置在该闭包内，并且当时也不要在数据库中设置图像 url，之后使用保存按钮使用新创建的属性同时发布姓名、电话和网址。

var imageURL = ""

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any])
{
    let image = info[UIImagePickerControllerOriginalImage] as? UIImage

    addImage.image = image

    var data = Data()
    data = UIImagePNGRepresentation(image!)!

    let uniqueName = NSUUID().uuidString
    let imageRef = FIRStorage.storage().reference().child("restaurantImage").child("\(uniqueName)")
    imageRef.put(data, metadata: nil).observe(.success){(snapshot) in
        self.imageURL = snapshot.metadata?.downloadURL()?.absoluteString
        //Remove other code        
    }
    self.dismiss(animated: true, completion: nil)
}

现在，使用您的 addRestaurant 添加 image 的键，并使用 imageURL 设置其值

func addRestaurant()
{
    ref = FIRDatabase.database().reference().child("restaurants")        
    let key = ref?.childByAutoId().key        
    let name = addName.text        
    let phone = addPhone.text        
    ref?.child(key!).setValue(["name": name, "phone": phone, "image": imageURL])

}