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| @interface Animal : NSObject @end
@interface Cat : Animal @end
@interface Dog : Animal @end
@implementation Animal
+ (void)load {
NSLog(@"in Animal load %@",NSStringFromClass([self class]));
}
+(void) initialize{
NSLog(@"in Animal initialize with %@",NSStringFromClass([self class]));
}
@end
@implementation Cat @end
@implementation Dog @end
@implementation AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
NSLog(@">1");
Cat *cat0 = [[Cat alloc] init];
NSLog(@">2");
Dog *dog0 = [[Dog alloc] init];
NSLog(@">3");
Cat *cat1 = [[Cat alloc] init];
NSLog(@">4");
Dog *dog1 = [[Dog alloc] init];
return YES;
}
@end
|