Question

所以我有一个导航栏，上面有一个“后退”按钮，右边有一个UISearchBar：

！[在此处输入图片说明] [1]

当UISearchBar打开/显示时，取消按钮隐藏/显示：

！[在此输入图片说明] [2]

我想要的是当UISearchBar打开时，我希望它基本上“覆盖”后退按钮。当它关闭时，我希望它“揭开”后退按钮。到目前为止，这是我的代码：

#import "SearchViewController.h"

@interface SearchViewController ()

@end

- (void)viewDidLoad {
    [super viewDidLoad];
    if ([self respondsToSelector:@selector(edgesForExtendedLayout)])
        self.edgesForExtendedLayout = UIRectEdgeNone;

    UISearchBar *searchBar = [UISearchBar new];
    searchBar.showsCancelButton = NO;
    [searchBar sizeToFit];
    searchBar.delegate = self;

    self.navigationItem.titleView = searchBar;
    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:nil style:UIBarButtonItemStylePlain target:self action:nil];

}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
}


- (void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar
{
    [searchBar setShowsCancelButton:YES animated:YES];
}

- (void)searchBarTextDidEndEditing:(UISearchBar *)searchBar
{
    [searchBar setShowsCancelButton:NO animated:YES];
}

- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar
{
    [searchBar resignFirstResponder];
    [searchBar setShowsCancelButton:NO animated:YES];
}

@end

我尝试过做的事情：{b}在searchBarTextDidBeginEditing / searchBarTextDidEndEditing中，但这会留下后退按钮为空的位置：

！[在此输入图片说明] [3]

有没有办法让搜索栏延伸到后退按钮？谢谢！

Answer 1

尝试通过

进行

[ui]
username = My Name <myname@domain.com>

[extensions]
hgext.convert=
hgext.bookmarks =
hggit =

或

self.navigationItem.leftBarButtonItem=nil;
self.navigationItem.hidesBackButton=YES;

更新的代码：

self.navigationItem.backBarButtonItem=nil;

当搜索栏打开/关闭时，隐藏/显示导航栏上的按钮

1 个答案: