我如何在协议委托方法得到的通知和对象发送一个对象来操作

Question

@protocol VideoDelegate <NSObject> 

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

我想送与videoPlayBackDidFinish JSON对象，所以我会接受它完成的通知，我可以任选该对象的使用部位

例如：object.valueOfWhatever

Answer 1

转换的JSON的字典，然后在该通知将其作为用户信息：

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，而无需在委托做这样的事情：

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

，然后在方法获取到字典：

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