使用 Parse (Swift 3) 注册用户时如何添加头像

Posted 2023-03-10

【中文标题】使用 Parse (Swift 3) 注册用户时如何添加头像

【英文标题】：How do I add an avatar when signing up a user with Parse (Swift 3)

【发布时间】：2017-01-03 17:33:41

【问题描述】：

我有一个函数可以成功地将用户添加到我的 Parse 类的 User 表中，但我想在注册表单中添加一个头像。

事情的 stoyboard 方面工作正常，我可以从相机或照片库中选择图像并将其添加到我的 imageView (profilePic) 但是当我尝试将其添加到 signUpInBackground 方法时，它会使应用程序崩溃。

我是 ios 开发的新手，但熟悉其他编码语言，所以它并不完全是陌生的，我只是不知道我在这里缺少什么，或者是否无法在注册时添加图像？

救命！

let user = PFUser()

user.email = emailAddress.text
user.username = screenName.text
user.password = password.text

let image = self.profilePic.image

if image != nil 

    let imagedata = UIImagePNGRepresentation(image!)!

        let file = PFFile(name: "image.png", data: imagedata)

        user["profilePic"] = file

    

    user.signUpInBackground(block:  (success, error) in

        if error != nil 

            // error code

         else 

            // user logged in successfully

        
            

【参考方案1】：

这是你可以做的。我也为它添加了验证。我还创建了它，一旦成功注册，然后登录用户。如果你不想要它，你可以删除它。这是swift3 示例！

@IBOutlet weak var avatarImage: UIImageView!
@IBOutlet var emailAddress: UITextField!
@IBOutlet var password: UITextField!

// MARK: - UPLOAD AVATAR BUTTON
@IBAction func uploadAvatarButt(_ sender: AnyObject) 
    let alert = UIAlertController(title: APP_NAME,
        message: "Select source",
        preferredStyle: .alert)

    let camera = UIAlertAction(title: "Take a picture", style: .default, handler:  (action) -> Void in
        if UIImagePickerController.isSourceTypeAvailable(.camera) 
            let imagePicker = UIImagePickerController()
            imagePicker.delegate = self
            imagePicker.sourceType = .camera
            imagePicker.allowsEditing = false
            self.present(imagePicker, animated: true, completion: nil)
        
    )

    let library = UIAlertAction(title: "Pick from library", style: .default, handler:  (action) -> Void in
        if UIImagePickerController.isSourceTypeAvailable(.photoLibrary) 
            let imagePicker = UIImagePickerController()
            imagePicker.delegate = self
            imagePicker.sourceType = .photoLibrary
            imagePicker.allowsEditing = false
            self.present(imagePicker, animated: true, completion: nil)
        
    )

    // Cancel button
    let cancel = UIAlertAction(title: "Cancel", style: .destructive, handler:  (action) -> Void in )

    alert.addAction(camera)
    alert.addAction(library)
    alert.addAction(cancel)
    present(alert, animated: true, completion: nil)



// ImagePicker delegate
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) 
    if let image = info[UIImagePickerControllerOriginalImage] as? UIImage 
        avatarImage.image = image
    
   dismiss(animated: true, completion: nil)


// MARK: - SIGNUP BUTTON
@IBAction func signupButt(_ sender: AnyObject) 

    if  password.text == "" || emailAddress.text == "" || screenName.text == "" 

           //You can alert  here , that fields need to be filled. 

     else 
        let userForSignUp = PFUser()
        userForSignUp.username = screenName.text!.lowercased()
        userForSignUp.password = password.text
        userForSignUp.email = emailAddress.text

        if avatarImage.image != nil 
            let imageData = UIImageJPEGRepresentation(avatarImage.image!, 0.8)
            let imageFile = PFFile(name:"image.jpg", data:imageData!)
            // profilePic needs to be the name of the col 
            userForSignUp["profilePic"] = imageFile
        


        userForSignUp.signUpInBackground  (succeeded, error) -> Void in
            if error == nil 

              //Signup Success
                PFUser.logInWithUsername(inBackground: self.screenName.text!, password:self.password.text!)  (user, error) -> Void in
                    if error == nil 
                        //Login Success
                     else 
                        //Login Falied
                    
            // ERROR
             else 
               //Signup Failed
        
    

【讨论】：

太棒了！非常感谢！我不想用你所有的代码替换我所有的代码，而是想逐行检查有什么不同，我唯一能发现不同的是你保存的是 Jpeg 而不是 Png - 所以我改变了它并且有效。看起来 IOS 模拟器中的默认图像，当保存为 PNG 时超过 10mb，这就是导致崩溃的原因！非常感谢您对此的帮助！