製作第一個iOS應用程序

Question

我想學習使用iOS構建應用程序。我使用Xcode 6.4，並且the tutorial I was following似乎接受使用樂趣和重寫，但是當我嘗試它時，它會帶來錯誤。我將受保護的頁面連接到我的註冊頁面。

#import "ViewController.h" 

@interface ViewController() 

@end 

@implementation ViewController 

- (void)viewDidLoad { 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view, typically from a nib. 
} 

- (void)didReceiveMemoryWarning { 
    [super didReceiveMemoryWarning]; 
    // Dispose of any resources that can be recreated. 

    - (void)ViewDidAppear(animated: bool) { 
     [self.PerformSegueWithIdentifier("LoginView", sender: self)]; 
    } 

} 

@end 

有人能幫我指出我的錯誤和解決方案嗎？

Answer 1

歡迎SO通常，這不是一般的調試服務，但你可能喜歡腳踩上去......

1. 在Objective-C方法不能內的其他方法聲明。它們可以在斯威夫特
2. 斯威夫特代碼不能smooshed在靠Objective-C代碼。
3. 案例是在雨燕的OBJ-C重要的，所以PerformSegueWithIdentifier是不一樣的performSegueWithIdentifier

---

所以正確版本的你正在嘗試做的是...

@interface ViewController() 

@end 

@implementation ViewController 

- (void)viewDidLoad { 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view, typically from a nib. 
} 

- (void)didReceiveMemoryWarning { 
    [super didReceiveMemoryWarning]; 
    // Dispose of any resources that can be recreated. 

} 

- (void)viewDidAppear:(BOOL)animated { 
    [self performSegueWithIdentifier:@"LoginView" sender:self]; 
} 

@end 

玩得開心，享受iOS開發。

Answer 2

您不能插入在另一個

方法定義在我以某種方式認爲你搞砸了斯威夫特和Objective C代碼， 你的代碼應該是這樣的：

@interface ViewController() 

@end 

@implementation ViewController 

- (void)viewDidLoad { 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view, typically from a nib. 
} 

- (void)didReceiveMemoryWarning { 
    [super didReceiveMemoryWarning]; 
    // Dispose of any resources that can be recreated. 


} 

- (void)viewDidAppear:(BOOL)animated { 
    [super viewDidAppear:animated]; 

    [self performSegueWithIdentifier:@"LoginView" sender:self]; 
} 

@end 

Answer 3

看起來像你只是試圖重寫viewcontrollers viewDidAppear方法。如果是這樣的話，該方法是在錯誤的地方（在你的代碼，它的內部didReceiveMemoryWarning

巢

試試這個：

@interface ViewController() 

@end 

@implementation ViewController 

- (void)viewDidLoad { 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view, typically from a nib. 
} 

- (void)viewDidAppear:(BOOL) animated { 
    [super viewDidAppear:animated]; 
    [self.performSegueWithIdentifier("nameOfSeque", sender: self)]; 
} 

- (void)didReceiveMemoryWarning { 
    [super didReceiveMemoryWarning]; 
    // Dispose of any resources that can be recreated. 
} 

@end