Objective c iOS 5.0警告：找不到代理的协议定义

我有自定义UIView类GestureView。我有一个关于这个类的转发声明，它是下面的委托。我已将GestureView.h导入.m文件。这可以正常工作，但iOS会发出警告消息说“找不到GestureViewDelegate的协议定义”。若我删除转发声明，它将给出与错误相同的警告消息。我不想从ContainerViewController.h导入GestureView.h，因为我通常在.m文件中导入内容。有人能解释一下下面的课堂结构有什么问题吗

ContainerViewController.h

#import <UIKit/UIKit.h>

@class DividerView;
@class GestureView;
@protocol GestureViewDelegate;

@interface ContainerViewController : UIViewController<GestureViewDelegate>
   @property (strong, nonatomic) IBOutlet GestureView *topContentView;
@end

#import <UIKit/UIKit.h>

@protocol GestureViewDelegate;

@interface GestureView : UIView
    - (void)initialiseGestures:(id)delegate;
@end

@protocol GestureViewDelegate <NSObject>
@required
- (void)GestureView:(GestureView*)view handleSignleTap:(UITapGestureRecognizer*)recognizer;
@end

#import <UIKit/UIKit.h>


@protocol GestureViewDelegate;

@interface GestureView : UIView

- (void)initialiseGestures:(id <GestureViewDelegate>)delegate;

@end


@protocol GestureViewDelegate <NSObject>
@required

- (void)gestureView:(GestureView *)view handleSingleTap:(UITapGestureRecognizer *)recognizer;

@end

#import <UIKit/UIKit.h>


@class GestureView;

@interface CollectionViewController : UIViewController

// this property is declared as readonly because external classes don't need to modify the value (I guessed seen as it was an IBOutlet)
@property (strong, nonatomic, readonly) GestureView *topContentView;

@end

#导入
@类别划分视图；
@类手势视图；
@协议手势视图代表；
@接口ContainerViewController:UIViewController
@属性（强，非原子）IBOutlet GestureView*topContentView；
@结束

GestureView.h

#import <UIKit/UIKit.h>

@class DividerView;
@class GestureView;
@protocol GestureViewDelegate;

@interface ContainerViewController : UIViewController<GestureViewDelegate>
   @property (strong, nonatomic) IBOutlet GestureView *topContentView;
@end

#import <UIKit/UIKit.h>

@protocol GestureViewDelegate;

@interface GestureView : UIView
    - (void)initialiseGestures:(id)delegate;
@end

@protocol GestureViewDelegate <NSObject>
@required
- (void)GestureView:(GestureView*)view handleSignleTap:(UITapGestureRecognizer*)recognizer;
@end

#import <UIKit/UIKit.h>


@protocol GestureViewDelegate;

@interface GestureView : UIView

- (void)initialiseGestures:(id <GestureViewDelegate>)delegate;

@end


@protocol GestureViewDelegate <NSObject>
@required

- (void)gestureView:(GestureView *)view handleSingleTap:(UITapGestureRecognizer *)recognizer;

@end

#import <UIKit/UIKit.h>


@class GestureView;

@interface CollectionViewController : UIViewController

// this property is declared as readonly because external classes don't need to modify the value (I guessed seen as it was an IBOutlet)
@property (strong, nonatomic, readonly) GestureView *topContentView;

@end

#导入
@协议手势视图代表；
@界面手势视图：UIView
-（无效）初始签名：（id）代表；
@结束
@协议手势视图代理
@必需的
-（void）GestureView:（GestureView*）view handleSignleTap:（UITapGestureRecognitor*）识别器；
@结束

试试这种方法，如果有效，请回复

手势视图

#import <UIKit/UIKit.h>

@protocol GestureViewDelegate <NSObject>
@required
- (void)GestureView:(GestureView*)view handleSignleTap:(UITapGestureRecognizer*)recognizer;
@end

@interface GestureView : UIView
    - (void)initialiseGestures:(id)delegate;
@end

#导入
@协议手势视图代理
@必需的
-（void）GestureView:（GestureView*）view handleSignleTap:（UITapGestureRecognitor*）识别器；
@结束
@界面手势视图：UIView
-（无效）初始签名：（id）代表；
@结束

ContainerView.h

#import <UIKit/UIKit.h>

@class DividerView;
@class GestureView;
/*@protocol GestureViewDelegate;*/ //NO NEED TO WRITE THIS

@interface ContainerViewController : UIViewController<GestureViewDelegate>
   @property (strong, nonatomic) IBOutlet GestureView *topContentView;
@end

#导入
@类别划分视图；
@类手势视图；
/*@协议GestureViewDelegate；*///没必要写这个
@接口ContainerViewController:UIViewController
@属性（强，非原子）IBOutlet GestureView*topContentView；
@结束

我喜欢您试图避免在头文件中导入：非常好的做法。然而，为了修复你的bug，你可以把你的代码做得更好！在我看来，您的

ContainerViewController

类实际上没有必要对外声明它支持

GestureViewDelegate

协议，因此您应该将其移动到实现文件中。像这样：

GestureView.h

#import <UIKit/UIKit.h>

@class DividerView;
@class GestureView;
@protocol GestureViewDelegate;

@interface ContainerViewController : UIViewController<GestureViewDelegate>
   @property (strong, nonatomic) IBOutlet GestureView *topContentView;
@end

#import <UIKit/UIKit.h>

@protocol GestureViewDelegate;

@interface GestureView : UIView
    - (void)initialiseGestures:(id)delegate;
@end

@protocol GestureViewDelegate <NSObject>
@required
- (void)GestureView:(GestureView*)view handleSignleTap:(UITapGestureRecognizer*)recognizer;
@end

#import <UIKit/UIKit.h>


@protocol GestureViewDelegate;

@interface GestureView : UIView

- (void)initialiseGestures:(id <GestureViewDelegate>)delegate;

@end


@protocol GestureViewDelegate <NSObject>
@required

- (void)gestureView:(GestureView *)view handleSingleTap:(UITapGestureRecognizer *)recognizer;

@end

#import <UIKit/UIKit.h>


@class GestureView;

@interface CollectionViewController : UIViewController

// this property is declared as readonly because external classes don't need to modify the value (I guessed seen as it was an IBOutlet)
@property (strong, nonatomic, readonly) GestureView *topContentView;

@end

#导入
@协议手势视图代表；
@界面手势视图：UIView
-（无效）初始签名：（id）代表；
@结束
@协议手势视图代理
@必需的
-（void）gestureView:（gestureView*）视图句柄singletap:（UITapGestureRecognizer*）识别器；
@结束

ContainerViewController.h

#import <UIKit/UIKit.h>

@class DividerView;
@class GestureView;
@protocol GestureViewDelegate;

@interface ContainerViewController : UIViewController<GestureViewDelegate>
   @property (strong, nonatomic) IBOutlet GestureView *topContentView;
@end

#import <UIKit/UIKit.h>

@protocol GestureViewDelegate;

@interface GestureView : UIView
    - (void)initialiseGestures:(id)delegate;
@end

@protocol GestureViewDelegate <NSObject>
@required
- (void)GestureView:(GestureView*)view handleSignleTap:(UITapGestureRecognizer*)recognizer;
@end

#import <UIKit/UIKit.h>


@protocol GestureViewDelegate;

@interface GestureView : UIView

- (void)initialiseGestures:(id <GestureViewDelegate>)delegate;

@end


@protocol GestureViewDelegate <NSObject>
@required

- (void)gestureView:(GestureView *)view handleSingleTap:(UITapGestureRecognizer *)recognizer;

@end

#import <UIKit/UIKit.h>


@class GestureView;

@interface CollectionViewController : UIViewController

// this property is declared as readonly because external classes don't need to modify the value (I guessed seen as it was an IBOutlet)
@property (strong, nonatomic, readonly) GestureView *topContentView;

@end

#导入
@类手势视图；
@接口集合ViewController:UIViewController
//该属性声明为只读，因为外部类不需要修改该值（我猜它是一个IBOutlet）
@属性（强、非原子、只读）GestureView*topContentView；
@结束

ContainerViewController.m

#import "ContainerViewController.h"
#import "GestureView.h"


// this private interface declares that GestureViewDelegate is supported
@interface CollectionViewController () <GestureViewDelegate>

// the view is redeclared in the implementation file as readwrite and IBOutlet
@property (strong, nonatomic) IBOutlet GestureView *topContentView;

@end


@implementation ContainerViewController

// your implementation code goes here

@end

#导入“ContainerViewController.h”
#导入“GestureView.h”
//此专用接口声明支持GestureViewDelegate
@接口集合ViewController（）
//该视图在实现文件中重新声明为readwrite和IBOutlet
@属性（强，非原子）IBOutlet GestureView*topContentView；
@结束
@ContainerViewController的实现
//您的实现代码在这里
@结束

您的协议定义在哪里？您可以在我发布的代码中看到！在手势视图中。h！在

ContainerViewController.h

中，尝试导入手势视图.h而不是前向声明我提到我不想这样做！如果你知道远期申报有什么问题，请告诉我。谢谢，不行，不行。我已经试过了。它会给出与错误相同的警告信息！尼尔真棒！我理解您的解决方案，它对我来说完全有意义，但我想知道其他协议（如UITableView委托和数据源）是如何实现的？您可以在头文件声明本身中实现它们！我们是否可以创建自定义协议，以便在实现它时，必须重写@required方法？如果我们不实现它们，那么就没有任何协议的意义。我可以简单地从ContainerViewController中完全删除协议委托变量，并在InitialisePictures中传递它的id。此外，在这种情况下，iOS编译器不应该给出任何警告消息。转发声明旨在避免编译时警告和错误！不是吗？虽然这样做有效，但更清楚的是将受支持的代理列在一个位置—列出所有标准代理的头文件中。例如，在我的

.h

文件中，我可能有

，理想情况下，我希望将所有学员都放在那里。如何做到这一点？@TRedman在这种情况下，我的建议是在一个单独的头文件中声明

GestureViewDelegate

（例如

GestureViewDelegate.h

），该文件可以导入到实现头文件中（而类本身可以向前声明）。谢谢你，我今天早上就有这个想法。