如何解决ios中@class中的“预期类型”错误

Question

这是我的代码。它在第一行显示“预期类型”错误。

@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！ ：）