找不到我的自定義代理的協議聲明

Question

我遇到了我設置的代理的奇怪問題。我得到的錯誤是「無法找到協議聲明 'SearchViewDelegate'

ListViewController.h

#import "SearchView.h" 
@class SearchView; 
@protocol SearchViewDelegate <NSObject> 
@optional 
- (void)didTapSearchButton:(SearchView *)searchView; 
@end 

@interface TaskListViewController : UIViewController <UITableViewDelegate,UITableViewDataSource, UITextFieldDelegate>{ 
    SearchView *searchView; 
} 

@property(nonatomic, assign) id<SearchViewDelegate> delegate; 

ListViewController.m

- (IBAction)didTapSearchButton 
{ 
    NSString *searchTerm = searchView.searchField.text; 

    if ([searchTerm isEqualToString:@""]) { 
    [self.view endEditing:YES]; 
    return ; 
    } 

    [searchView resignFirstResponder]; 
    NSArray *results = [[CoreDataManager sharedInstance] fetchTaskByName:searchTerm]; 

    [tasks removeAllObjects]; 
    [tasks addObjectsFromArray:results]; 

    [self.view endEditing:YES]; 
    [taskTable reloadData]; 
} 

SearchView.h

#import <UIKit/UIKit.h> 

@interface SearchView : UIView <UITextFieldDelegate, UISearchBarDelegate, SearchViewDelegate> // <- where the protocol error occurrs 
@property (nonatomic, strong) UITextField *searchField; 
@property (nonatomic, strong) UIButton *searchButton; 

@end 

我想我正確地宣佈了代表和一切。

這裏就是我要調用的委託方法，在searchView.m：

- (BOOL)textFieldShouldReturn:(UITextField *)textField 
{ 
    [self.searchField.delegate didTapSearchButton:self]; 
    [textField resignFirstResponder]; 
    return YES; 
} 

Answer 1

你應該在SearchView.h中有委託協議聲明（我認爲它是SearchViewDelegate）。這是代表模式中的標準方式。

Answer 2

如果錯誤是在SearchView.h，我想你需要

#import "TaskListViewController.h" 

添加到頭。