我如何在協議委託方法得到的通知和對象發送一個對象來操作

Question

@protocol VideoDelegate <NSObject> 

@optional 
-(void)videoPlayBackDidFinish:(NSObject*)currencyInfo; 
-(void)videoPlayBackDidStart; 

我想送與videoPlayBackDidFinish JSON對象，所以我會接受它完成的通知，我可以任選該對象的使用部位

例如：object.valueOfWhatever

Answer 1

轉換的JSON的字典，然後在該通知將其作爲用戶信息：

NSDictionary *quickDict = [NSDictionary dictionaryWithObjectsAndKeys:object1, key1, nil]; 

NSNotification* notification = [NSNotification notificationWithName:kVideoDidFinishNotification object:self userInfo:quickDict]; 
[[NSNotificationCenter defaultCenter] postNotification:notification]; 

我不知道如何使videoPlayBackDidFinish是消息的接收器，而無需在委託做這樣的事情：

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(videoPlayBackDidFinish:) name:kVideoDidFinishNotification object:nil]; 

，然後在方法獲取到字典：

-(void)videoPlayBackDidFinish: (NSNotification*)notification 
{ 
    NSDictionary *jsonInfo = [notification userInfo]; 
}