如何解決ios中@class中的「Expected a type」錯誤

Question

這是我的代碼。它在第一行顯示'預期類型'錯誤。

@class RateView; 

@protocol RateViewDelegate <NSObject>; 

- (void)rateView:(RateView *)rateView ratingDidChange:(float)rating; 
@end 

@interface RateView : UIView 

Answer 1

@class RateView; 

@protocol RateViewDelegate<NSObject> /* Remove Semi colon after declaring the protocol,seems the mistake is here only! */ 

-(void)rateView:(RateView *)rateView ratingDidChange:(float)rating; 

@end 

@interface RateView : UIView 

@end 

HTH！ :)