objective-c - NSMutableArray addObject 不影响计数？

Question

谁能告诉我为什么 logging [self.giftees count] 一直返回 0，即使我正在向其中添加对象？

标题:

#import <UIKit/UIKit.h>

@interface Test2AppDelegate : NSObject <UIApplicationDelegate>  
{
    UIWindow *window;
    NSMutableArray *giftees;
}

@property (nonatomic, retain) UIWindow *window;
@property (nonatomic, retain) NSMutableArray *giftees;

@end

从 didFinishLaunchingWithOptions 调用:

- (void)bootstrapGiftees
{
    NSArray *gifteeNames = [NSArray arrayWithObjects:@"Jesse",,nil];

    for (NSString *gifteeName in gifteeNames)
    {
        GifteeModel *g = [[GifteeModel alloc] init];
        g.name = gifteeName;

        [self.giftees addObject:g];
        NSLog(@"giftees count = %d", [self.giftees count]);
        [g release];
}
}

Answer 1

“礼物”是否已初始化？如果为 nil，[giftees count] 也将返回 0