相关疑难解决方法(0)

我调用addImageToQueue后,我的应用程序崩溃了.我添加了initWithObjects:forKeys:count:但它没有帮助我.

Terminating app due to uncaught exception 'NSInvalidArgumentException', 
reason: '*** -[NSDictionary initWithObjects:forKeys:count:]: 
method only defined for abstract class.  
Define -[DictionaryWithTag initWithObjects:forKeys:count:]!'

我的代码

- (void)addImageToQueue:(NSDictionary *)dict
{
 DictionaryWithTag *dictTag = [DictionaryWithTag dictionaryWithDictionary:dict];
}

@interface DictionaryWithTag : NSDictionary
@property (nonatomic, assign) int tag;

- (id)initWithObjects:(id *)objects forKeys:(id *)keys count:(NSUInteger)count;

@end

@implementation DictionaryWithTag

@synthesize tag;

- (id)initWithObjects:(id *)objects forKeys:(id *)keys count:(NSUInteger)count
{
 return [super initWithObjects:objects forKeys:keys count:count];
}
@end

可能重复:
如何从NSDictionary继承？

根据API,我必须覆盖方法:

setObject:forKey:
removeObjectForKey:
initWithObjects:forKeys:
count
objectForKey:
keyEnumerator

你能提供一个关于如何覆盖它们的例子吗？