Question

我做了一个非常简单的NSObject：

GameSetUpData.h

@interface GameSetUpData : NSObject

@property (readwrite, nonatomic)    NSUInteger      numberOfPlayers;
@property (strong, nonatomic)       NSMutableArray  *playerNames;
@property (strong, nonatomic)       NSString        *gameType;
@property (readwrite, nonatomic)    NSUInteger      numberOfMinutes;
@property (readwrite, nonatomic)    NSUInteger      numberOfTurns;
@property (readwrite, nonatomic)    CGSize          boardSize;

@end

GameSetUpData.m

#import "GameSetUpData.h"

@implementation GameSetUpData

@synthesize numberOfPlayers = _numberOfPlayers;
@synthesize playerNames = _playerNames;
@synthesize gameType = _gameType;
@synthesize numberOfMinutes = _numberOfMinutes;
@synthesize numberOfTurns = _numberOfTurns;
@synthesize boardSize = _boardSize;

@end

这个类基本上只保存数据。然后我尝试在我的viewcontroller中使用这个对象：

MainMenu.h

#import <UIKit/UIKit.h>
@class GameSetUpData;

@interface MainMenu : UIViewController

@property (strong, nonatomic) GameSetUpData *gameSetUp;

-(IBAction)tappedNewGame:(id)sender;
-(IBAction)tappedTwoPlayers:(id)sender;
...

MainMenu.m

#import "MainMenu.h"
#import "MJViewController.h"
#import "GameSetUpData.h"

@implementation MainMenu
@synthesize gameSetUp = _gameSetUp;

...

-(IBAction)tappedTwoPlayers:(id)sender {
    _gameSetUp.numberOfPlayers = 2;
    NSLog(@"number of Players: %d", _gameSetUp.numberOfPlayers);
}

不幸的是，我的NSLog说numberOfPlayers等于0.我的GameSetUpData出了什么问题？我被告知在iOS5中我们不需要调用alloc / init或者使用dealloc方法。我还需要GameSetUpData中的-(void)init方法吗？谢谢大家的时间！

编辑：请分配/初始化您的对象 - ARC仅处理发布/保留/自动释放。你仍然需要创建一个Object的实例！我为错误的信息道歉。我下次会确保RTFM ......

Answer 1

当然你必须分配/初始化你的对象。编译器应该如何知道何时这样做？使用ARC，您无需保留或释放。

在某处添加_gameSetUp = [[GameSetUpData alloc] init];。

无法让Custom NSObject初始化或使用iOS 5下的属性

1 个答案: