iOS：如何通過NSNotification發送UIInterfaceOrientation對象

Question

我想在NSNotification的userinfo字典中傳遞UIInterfaceOrientation對象。我怎麼能做到這一點？

Answer 1

把它包一個NSNumber內：

id orientationObject = [NSNumber numberWithInteger:UIInterfaceOrientationPortrait]; 
[userinfo setObject:orientationObject forKey:@"orientation"]; 

// pass around ... 

UIInterfaceOrientation orientation = (UIInterfaceOrientation)[[userinfo objectForKey:@"orientation"] integerValue];