iPhone导航栏不会显示设备上的所有按钮

Question

在iPhone模拟器上的纵向模式或设备上的横向模式下,它显示所有导航栏按钮,但在设备上以纵向模式使用时,不显示按钮.以下是导航栏的图像.

我用于测试的设备是运行iOS 6.1.3(10B329)的iPhone 4S.我使用的模拟器是运行iOS 6.0/6.1的7.0版(463.9.4).

我正在考虑在编辑模式下删除搜索按钮,但我更愿意将此选项保留给用户,无论模式如何.

任何帮助或见解表示赞赏,谢谢.

编辑: 最初viewDidLoad:为ViewController 创建并添加了正确的按钮,如下所示:

_deleteBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemTrash target:self action:@selector(deleteRows:)];
_deleteBarButtonItem.tintColor = [UIColor redColor];

_searchBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemSearch target:self action:@selector(searchButtonClicked:)];

self.navigationItem.rightBarButtonItems = @[_searchBarButtonItem, self.editButtonItem];

进入编辑模式时:

- (void)setEditing:(BOOL)editing animated:(BOOL)animated
{
    [super setEditing:editing animated:animated];

    if (self.tableView.isEditing) {
        // turn off editing
        _deleteBarButtonItem.enabled = NO;
        [self.tableView setEditing:NO animated:animated];
        [self.editButtonItem setStyle:UIBarButtonItemStylePlain];
        self.navigationItem.rightBarButtonItems = @[_searchBarButtonItem, self.editButtonItem];
    } else { 
        // turn on editing
        [self.tableView setEditing:YES animated:animated];
        [self.editButtonItem setStyle:UIBarButtonItemStyleDone];
        self.navigationItem.rightBarButtonItems = @[_searchBarButtonItem, _deleteBarButtonItem, self.editButtonItem];
    }
}

Answer 1

我选择了“较少选项”选项，专门针对纵向模式下的 iPhone，因为我找不到消失按钮的正确解决方案，而且确实没有足够的空间。在横向和 iPad 上，第三个按钮_searchBarButtonItem有空间显示，因此会显示。

以下是我为获得所需行为所做的更改。我希望有些人会发现这很有用。

-(void) viewDidLoad {
    ...
    self.navigationItem.rightBarButtonItems = @[_searchBarButtonItem, self.editButtonItem];
}

- (void) viewWillAppear:(BOOL)animated
{    
    [super viewWillAppear:animated];

    if (self.playerTableView.isEditing && !IS_IPAD)
    {
        if (UIInterfaceOrientationIsPortrait([[UIApplication sharedApplication] statusBarOrientation]))
        {
            self.navigationItem.rightBarButtonItems = @[_deleteBarButtonItem, self.editButtonItem];
        }
        else
        {
            self.navigationItem.rightBarButtonItems = @[_searchBarButtonItem, _deleteBarButtonItem, self.editButtonItem];
        }
    }
}

- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
{
    [super willAnimateRotationToInterfaceOrientation:toInterfaceOrientation duration:duration];

    if (self.playerTableView.isEditing && !IS_IPAD)
    {
        if (UIInterfaceOrientationIsPortrait(toInterfaceOrientation))
        {
            self.navigationItem.rightBarButtonItems = @[_deleteBarButtonItem, self.editButtonItem];
        }
        else
        {
            self.navigationItem.rightBarButtonItems = @[_searchBarButtonItem, _deleteBarButtonItem, self.editButtonItem];
        }
    }
}

- (void)setEditing:(BOOL)editing animated:(BOOL)animated
{
    [super setEditing:editing animated:animated];
    ...    
    if (self.playerTableView.isEditing) {
         ...
         self.navigationItem.rightBarButtonItems = @[_filterBarButtonItem, self.editButtonItem];
    } else {
        ...
        if (!IS_IPAD && UIInterfaceOrientationIsPortrait([[UIApplication sharedApplication] statusBarOrientation]))
        {
            self.navigationItem.rightBarButtonItems = @[_deleteBarButtonItem, self.editButtonItem];
        }
        else
        {
            self.navigationItem.rightBarButtonItems = @[_searchBarButtonItem, _deleteBarButtonItem, self.editButtonItem];
        }
    }
}