重复的协议定义 [英] Duplicate protocol definition

问题描述

收到警告消息，忽略ModalViewDelegate的重复协议定义

modalviewcontroller.h文件中定义的协议

  @protocol ModalViewDelegate; 
  - （void）dismissView：（id）sender; 
 @interface Modalviewcontroller：UIViewController 
 {
 id< ModalViewDelegate> delegate; 
} 
 @property（nonatomic，assign）id< ModalViewDelegate> delegate; 
 @end 
  

在Modalviewcontroller.m文件中合成代理

在Mainviewcontroller.h文件中

  @protocol ModalViewDelegate 
  - （void）didDismissModal： （ID）发送者; 
 @end 
 @interface Mainviewcontrollerontroller：UIViewController< ModalViewDelegate> 
  - （void）showModal：（id）sender; 
  

在Mainviewcontroller.m中没有合成代理

<我是否应该在mainviewcontroller.m文件中委托？

为什么我收到重复协议定义的警告消息？

解决方案

尝试在 modalviewcontroller.h中删除 @protocol ModalViewDelegate; 并在此文件中导入 Mainviewcontroller.h 。

Getting warning message that Duplicate protocol definition of ModalViewDelegate is ignored

Defined protocol in modalviewcontroller.h file

@protocol ModalViewDelegate;
-(void)dismissView:(id)sender;  
@interface Modalviewcontroller : UIViewController 
{
 id<ModalViewDelegate>delegate;
}
@property (nonatomic, assign) id<ModalViewDelegate>delegate;
@end

In the Modalviewcontroller.m file synthesize delegate

In Mainviewcontroller.h file

@protocol ModalViewDelegate 
-(void)didDismissModal:(id)sender;
@end
@interface Mainviewcontrollerontroller : UIViewController <ModalViewDelegate>
-(void)showModal:(id)sender;

In the Mainviewcontroller.m not synthesize delegate

Am I supposed to delegate in mainviewcontroller.m file too?

Why I'm getting warning message of duplicate protocol definition?

解决方案

Try to remove @protocol ModalViewDelegate; in modalviewcontroller.h and import Mainviewcontroller.h in this file.

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