找不到XXX的协议定义

Question

我首先声明了一个协议,然后使用它.但是我收到警告"无法找到LeveyPopListViewDelegate的协议定义".这是代码:

@protocol LeveyPopListViewDelegate;

@interface LeveyPopListView : UIView <LeveyPopListViewDelegate,UITableViewDataSource,   UITableViewDelegate,UITextFieldDelegate>

//the content of LeveyPopListView

@end

@protocol LeveyPopListViewDelegate <NSObject>
//the definition for LeveyPopListViewDelegate
@end

如果我首先提出定义LeveyPopListViewDelegate,我就不能LeveyPopListView在协议中使用.

Answer 1

我最终压制了对该特定线路的所有警告,这不是理想的但是效果很好.

// Forward-declare protocols (to avoid circular inclusion)
@protocol YourProtocol;
#pragma clang diagnostic push
// To get rid of 'No protocol definition found' warnings which are not accurate
#pragma clang diagnostic ignored "-Weverything" 

@interface YourClass: NSObject
// <YourProtocol>
#pragma clang diagnostic pop

确保你进行推送和弹出,否则你最终将忽略此文件的所有警告!

Answer 2

我总是这样做：

@class LeveyPopListView;

@protocol LeveyPopListViewDelegate <NSObject>
//the definition for LeveyPopListViewDelegate
@end

@interface LeveyPopListView : UIView <LeveyPopListViewDelegate,UITableViewDataSource,   UITableViewDelegate,UITextFieldDelegate>

//the content of LeveyPopListView

@end