如何用UIViewController創建子類UIViewControllerDebug？

Question

我使用超類UIController創建了一個自定義超類UIControllerDebug。

我和其他一些子類一起使用這個類。它與：

Undefined symbols for architecture i386: 
    "_OBJC_METACLASS_$_UIViewControllerDebug", referenced from: 
     _OBJC_METACLASS_$_Main in Main.o 
    "_OBJC_CLASS_$_UIViewControllerDebug", referenced from: 
     _OBJC_CLASS_$_Main in Main.o 
ld: symbol(s) not found for architecture i386 
collect2: ld returned 1 exit status 

什麼是渴望？

代碼在這裏： .H

#import <UIKit/UIKit.h> 
@interface UIViewControllerDebug : UIViewController 
@end 

.M

#import "UIViewControllerDebug.h" 
@implementation UIViewControllerDebug 
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{ 
    Output(@"[v]%@ touchesBegan",NSStringFromClass([self class])); 
} 
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{ 
    Output(@"[v]%@ touchesBegan",NSStringFromClass([self class])); 
} 
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{ 
    Output(@"[v]%@ touchesBegan",NSStringFromClass([self class])); 
} 
@end 

Answer 1

要麼你沒有的UIViewControllerDebug的@implementation在源代碼中，或者包含的UIViewControllerDebug的@implementation不是文件列在目標的「Build Phases」選項卡的「Compile Sources」部分中。