重写 super 的实例方法后，调用不到该方法

[tinymind]

原始代码

@interface Car : NSObject

- (void)run;

@end

@interface BMW : Car

- (void)run;

@end

@interface MiniBMW : BMW

@end

#pragma mark - Car

@implementation Car

- (void)run
{
    NSLog(@"Car is running");
}

@end

#pragma mark - BMW

@implementation BMW

- (void)run
{
    NSLog(@"BMW is running");
}

@end

#pragma mark - MiniBMW

@implementation MiniBMW

@end

修复代码

@implementation BMW

- (void)run
{
    NSLog(@"running method by hook");
}

@end

调用代码

    MiniBWM *bmw = [[MiniBMW alloc] init];
    [bmw run];

此时，调用 run 没有任何输出。