属性没有初始化

Question

无论我做什么，我似乎都不能初始化这些属性，我总是得到0或null作为输出。

Player.h: 
@interface Player : NSObject 
{ 
    NSString *name; 
} 
@property (nonatomic, strong) NSString *name; 
@end 

Player.m: 
@implementation Player 
@synthesize name; 
@end 



MainGameDisplay.h: 
#import "Player.h" 
@interface MainGameDisplay : UIViewController<UIScrollViewDelegate> 
{ 
    Player *player, *rival1, *rival2, *rival3; 
} 

MainGameDisplay.m: 
-(void) initCharAttributes { 
    player = [[Player alloc] init]; 
    player.name = @"PlayerName"; 
    NSLog(@"NAME:%@", player.name); //Output= NAME:(null) 
} 

Answer 1

尝试这些更改。您不需要在MainGameDisplay.h上公开如此多的实现。你的属性也会自动合成，所以你的@synthesize和支持iVar是没有必要的。另外，你不应该用init来启动一个方法名，除非它负责初始化你的类的一个实例。

Player.h: 
@interface Player : NSObject 

@property (nonatomic, strong) NSString *name; 

@end 

Player.m: 
@implementation Player 

@end 



MainGameDisplay.h: 
@interface MainGameDisplay : UIViewController 

MainGameDisplay.m: 
#import "Player.h" 

@interface MainGameDisplay() <UIScrollViewDelegate> 

@implementation MainGameDisplay { 
    Player *player, *rival1, *rival2, *rival3; 
} 

- (void)charAttributes { 
    player = [[Player alloc] init]; 
    player.name = @"PlayerName"; 
    NSLog(@"NAME:%@", player.name); //Output= NAME:(null) 
}