如何使用自定义 UISearchBar 获取搜索栏委托方法

Question

我为我的应用程序制作了一个自定义搜索栏，这是类：.h

@interface SearchView : UIView <UITextFieldDelegate, UISearchBarDelegate>
@property (nonatomic, strong) UITextField *searchField;
@property (nonatomic, strong) UIButton *searchButton;
@end

.m

@implementation SearchView
- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
      CGRect frame = CGRectMake(0, 0, 35, 35);
      [self.searchButton sizeToFit];
      self.alpha = 0.6;
      self.backgroundColor = [UIColor colorWithRed:206/255.0 green:206/255.0 blue:206/255.0 alpha:.8];
      self.searchButton = [UIButton buttonWithType:UIButtonTypeCustom];
      //[self.searchButton addTarget:self action:@selector(performSearchQuery) forControlEvents:UIControlEventTouchUpInside];
      [self.searchButton setImage:[UIImage imageNamed:@"SearchIcon2"] forState:UIControlStateNormal];
      //[self.searchButton sizeToFit];
      //self.searchButton.bounds.size.height = ;
      self.searchButton.frame = frame;
     // self.searchButton.right = frame.size.width - kPadding;
      [self addSubview:self.searchButton];
      self.searchField = [[UITextField alloc] initWithFrame:CGRectMake(43, -5, 270, 50)];
      //self.searchField.placeholder = [@"Search..." uppercaseString];
      self.searchField.delegate = self;
      self.searchField.autocorrectionType = UITextAutocorrectionTypeNo;
      self.searchField.autocapitalizationType = UITextAutocapitalizationTypeWords;
      self.searchField.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
      self.searchField.returnKeyType = UIReturnKeySearch;
      self.searchField.clearsOnBeginEditing = YES;
      self.searchField.clearButtonMode = UITextFieldViewModeWhileEditing;
      [self addSubview:self.searchField];
    }
    return self;
}

我正在尝试获取searchBarSearchButtonClicked:委托方法的功能。

这是该代码（taskListViewController）：

.h

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

.m

- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar {
  searchBar = (UISearchBar *)searchView;
  [self didTapSearchButton];
}
- (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];
    }

所以我在searchView类和TaskListViewController上设置了uisearchBarDelegate。它没有被调用的原因是因为我在子类化 uiview 而不是 uisearchBar 吗？如果您需要更多代码/详细信息，请告诉我！谢谢！

Answer 1

您已经创建了一个自定义搜索视图，因此建议您的类实现自己的委托搜索方法，而不是使用现有的UISearchBar来区分并使代码更具可读性。

您应该为SearchView类创建一个委托

在这里，您可以参考如何创建自己的一个如何在iOS应用程序中创建自定义委托

创建后，TaskListViewController可以符合该委托，您可以在点击搜索按钮时在搜索视图中调用该方法，以便 TaskListViewController 接收它