ios - 想要在导航栏上单击搜索按钮时在导航栏上添加搜索栏

Question

我正在使用 UItableView 控制器，我无法将搜索栏添加到导航栏。当单击导航栏上的搜索按钮时，我希望搜索栏出现。如何在导航栏上添加搜索按钮和搜索栏。

Answer 1

在按钮单击 => .m 文件处添加此内容：

 UISearchBar  *sBar = [[UISearchBar alloc]initWithFrame:CGRectMake(0,10,self.navigationController.navigationBar.bounds.size.width,self.navigationController.navigationBar.bounds.size.height/2)];
sBar.delegate = self;
[self.navigationController.navigationBar addSubview:sBar];

并添加这个 => .h 文件

@interface ViewController : UIViewController<UISearchBarDelegate>

Answer 2

要制作这样的搜索栏，您需要在导航栏控制器中插入 Button 并将背景图像设置为search.png（您的图像）。因此，当用户单击此按钮时，将目标设置为searchbar打开。请检查以下代码以供参考。

首先在你的.h文件中设置委托方法。

@interface FriendsViewController : UIViewController <UISearchDisplayDelegate,UISearchBarDelegate,UIAlertViewDelegate>
 @property (nonatomic, strong) UIButton *searchButton;
 @property (nonatomic, strong) UIBarButtonItem *searchItem;
 @property (nonatomic, strong) UISearchBar *searchBar;
 @property (strong, nonatomic) UISearchController *searchController;
 @property (strong, nonatomic) UISearchDisplayController *d1;

然后在您的导航栏中插入按钮。

- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
UIButton *btn=[[UIButton alloc]initWithFrame:CGRectMake(279,9,25, 25)];
[btn setImage:[UIImage imageNamed:@"search"] //put here your searchimage
forState:UIControlStateNormal];
[btn setTitle:@"" forState:UIControlStateNormal];
[btn addTarget:self action:@selector(clickme:) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *barbtn=[[UIBarButtonItem alloc]initWithCustomView:btn];
self.tabBarController.navigationItem.rightBarButtonItem=barbtn;
[self.tabBarController.navigationController.navigationBar setHidden:NO];

现在您必须在clickme按钮方法上设置 searchcontroller。

- (IBAction)clickme:(id)sender{
UISearchBar *searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(0, 0, 300, 44.0)];
searchBar.autoresizingMask =0;
searchBar.delegate = self;
searchBar.placeholder = @"Search for items...";
searchBar.showsScopeBar=YES;

UIView *searchBarWrapper = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 200, 44)];
searchBarWrapper.autoresizingMask = 0;
[searchBarWrapper addSubview:searchBar];

self.searchItem = [[UIBarButtonItem alloc] initWithCustomView:searchBarWrapper];
self.tabBarController.navigationItem.leftBarButtonItem = self.searchItem;

self.navigationItem.rightBarButtonItem = nil;
self.navigationItem.titleView = nil;

  ////////////// ~ Search Display Controller as Object ~/////////////////////////////

self.d1 = [[UISearchDisplayController alloc] initWithSearchBar:searchBar contentsController:self];
self.d1.delegate = self;
self.d1.searchResultsDataSource = self;
self.d1.searchResultsDelegate = self;
self.d1.searchResultsTableView.rowHeight = 40;
self.d1.displaysSearchBarInNavigationBar = YES;
self.searchBar.translucent = NO;
self.searchBar.barTintColor = [UIColor grayColor];
self.d1.searchBar.tintColor = [UIColor blueColor];

[searchBar sizeToFit];

}

当您点击搜索图标时

Answer 3

对于搜索按钮，您可以根据需要使用 UIBarButtonSystemItemSearch。

self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]
                               initWithBarButtonSystemItem:UIBarButtonSystemItemSearch
                               target:self
                               action:@selector(actionSearch:)];

您可以将搜索栏设置为导航栏的标题视图

self.navigationItem.titleView = mySearchBar;