Question

当我定义一个继承自NSObject的新类时：

@interface Photo : NSObject
{
    NSString* caption;
    NSString* photographer;
}

@property NSString* caption;
@property NSString* photographer;

@end

是新类alloc继承的NSObject中的所有类方法（如Photo）？

Answer 1

是的，Photo可以在您NSObject的子类时使用NSObject的任何方法/属性/ ivar / etc（除了声明为@private的iVars除外）：

Photo *myPhoto;
myPhoto = [[Photo alloc] init];
// ... Do some myPhoto stuff ...
NSLog(@"Photo object: %@", myPhoto);
NSLog(@"Photo description: %@", [myPhoto description]);
NSLog(@"Photo caption: %@", [myPhoto caption]);
NSLog(@"Photo photographer: %@", [myPhoto photographer]);

有关@private的更多信息 - ＆gt; SO Question: what-does-private-mean-in-objective-c

NSObject Class Reference

类方法也继承了吗？

1 个答案: