Question

我已经宣布了一个名为Squad的属性，但是当我发送[self getSquad]时，我得到了＃34; SquadViewController没有可见的@interface声明了选择器＆＃39; getSquad＆＃39;＆＃34;。

SquadViewController.h：

#import "FlipsideViewController.h"
#import "Squad.h"

@interface SquadViewController : UIViewController <FlipsideViewControllerDelegate, UIPopoverControllerDelegate>

@property (strong, nonatomic) NSManagedObjectContext *managedObjectContext;

@property (strong, nonatomic) UIPopoverController *flipsidePopoverController;

@property (nonatomic, retain) IBOutlet UILabel *squadNameLabel;

@property Squad *squad;

- (IBAction)updateTitleWithName:(id)sender;

@end

SquadViewController.m：

#import "SquadViewController.h"

@interface SquadViewController ()

@end

@implementation SquadViewController

@synthesize squadNameLabel;
@synthesize squad;

...

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    if (![self getSquad]) //<--THIS IS WHERE THE ERROR IS
    {
        [self setSquad:[Squad squadWithName:@"New Squad"]]; //<-- NOT HERE, SO THE SETTER SEEMS TO EXIST
    }
}

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

...

我认为＆＃34; @synthesize小队＆＃34;会生成getSquad和setSquad，所以我很困惑。

这里是Squad的代码，如果由于某些原因我没有得到它的相关性（我是Objective C的新手，我仍然觉得它很混乱（我和＃39;来自java背景））：

Squad.h：

#import "SquadBuilderObject.h"

@interface Squad : NSObject

@property NSString *name;

+ (id) squadWithName:(NSString*)name;

@end

Squad.m：

#import "Squad.h"

@implementation Squad

@synthesize name;

+ (id)squadWithName:(NSString *)name
{
    Squad *newSquad = [[Squad alloc] init];
    [newSquad setName:name];
    return newSquad;
}

@end

Answer 1

名为squad的属性的标准getter为squad，而不是getSquad。

“get ...”命名法通常保留用于引用返回的内容（例如- (BOOL)getSquad:(Squad **)outSquad）。

为什么我的@property没有自动吸气器？

1 个答案: