Question

我像这样继承PFUser：

// User.swift
import UIKit
import Parse

class User: PFObject, PFSubclassing {
    override class func initialize() {
        struct Static {
            static var onceToken : dispatch_once_t = 0;
        }
        dispatch_once(&Static.onceToken) {
            self.registerSubclass()
        }
    }

    static func parseClassName() -> String {
        return "_User"
    }
}

然后我有一个注册视图控制器，其中包含一些文本字段和一个按钮操作，它将用户异步注册到我的Parse应用程序：

    // MARK: - Actions
    @IBAction func signUpAction(sender: UIButton) {
        var email = self.emailTextField.text
        var username = self.usernameTextField.text
        var password = self.passwordTextField.text

        // Run a spinner to show a task in progress
        var spinner: UIActivityIndicatorView = UIActivityIndicatorView(frame: CGRectMake(0, 0, 150, 150)) as UIActivityIndicatorView
        spinner.startAnimating()

        var newUser = User()

        // Sign up the user asynchronously
        newUser.signUpInBackgroundWithBlock({
            (succeed, error) -> Void in

            // Stop the spinner
            spinner.stopAnimating()
            if ((error) != nil) {
                var alert = UIAlertView(title: "Error", message: "\(error)", delegate: self, cancelButtonTitle: "OK")
                alert.show()

            } else {
                var alert = UIAlertView(title: "Success", message: "Signed Up", delegate: self, cancelButtonTitle: "OK")
                alert.show()
                dispatch_async(dispatch_get_main_queue(), { () -> Void in
                    let viewController:UIViewController = UIStoryboard(name: "Main", bundle: nil).instantiateViewControllerWithIdentifier("Home") as! UIViewController
                    self.presentViewController(viewController, animated: true, completion: nil)
                })
            }
        })
    }

然后我得到三个编译错误，我不知道如何解决。我刚刚开始使用Swift和Parse，所以如果我在做PFUser的子类化时做错了，或者它有什么东西，我有点困惑与Parse SDK

有关

以下是我遇到的错误：

'SignUpViewController.User' does not conform to protocol 'PFSubclassing'

Value of type 'SignUpViewController.User' has no member 'signUpInBackgroundWithBlock'

Value of type 'User' has no member 'signUpInBackgroundWithBlock'

我已经关注了Parse documentation guide on subclassing，所以我很感谢你们的开发人员提供的任何帮助！

在Swift中对PFUser进行子类化没有成员＆＃39; signUpInBackgroundWithBlock＆＃39;

0 个答案: