我如何自定义导航返回按钮在iOS 7及以上没有标题?(即只使用箭头)

self.navigationItem.leftBarButtonItem = self.editButtonItem;

我只是想知道它们是否有self。backbuttonitem;

OR

像这样的东西?

self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc]
                   initWithBarButtonSystemItem:UIBarButtonSystemItemBACK 
                   target:self action:@selector(back)];

当前回答

你可以用这个。这对我来说是完美的,只是添加一个UIButton作为UIBarButtonItem的定制视图。

试试下面的代码

    self.navigationItem.leftBarButtonItem=[self backButton];


- (UIBarButtonItem *)backButton
{
    UIImage *image = [UIImage imageNamed:@"back-btn.png"];
    CGRect buttonFrame = CGRectMake(0, 0, image.size.width, image.size.height);

    UIButton *button = [[UIButton alloc] initWithFrame:buttonFrame];
    [button addTarget:self action:@selector(backButtonPressed) forControlEvents:UIControlEventTouchUpInside];
    [button setImage:image forState:UIControlStateNormal];

    UIBarButtonItem *item= [[UIBarButtonItem alloc] initWithCustomView:button];

    return item;
}

其他回答

iOS6的简单破解也适用于iOS7:

[UIBarButtonItem.appearance setBackButtonTitlePositionAdjustment:UIOffsetMake(0, -60) forBarMetrics:UIBarMetricsDefault];

编辑: 不要使用这种方法。详情见评论。

 // add left bar button item

try this code:

- (void)viewDidLoad
{ 
    [super viewDidLoad];

   UIImage* image_back = [UIImage imageNamed:@"your_leftarrowImage.png"];
    CGRect backframe = CGRectMake(250, 9, 15,21);
    UIButton *backbutton = [[UIButton alloc] initWithFrame:backframe];
    [backbutton setBackgroundImage:image_back forState:UIControlStateNormal];
    [backbutton addTarget:self action:@selector(Btn_back:)
         forControlEvents:UIControlEventTouchUpInside];
    [backbutton setShowsTouchWhenHighlighted:YES];
    UIBarButtonItem *backbarbutton =[[UIBarButtonItem alloc] initWithCustomView:backbutton];
    self.navigationItem.leftBarButtonItem=backbarbutton;
    [backbutton release];

}
-(IBAction)Btn_back:(id)sender
{
    [self.navigationController popViewControllerAnimated:YES];

}

斯威夫特4

对于那些希望创建自定义后退按钮以及删除它们的标题的人,请在视图控制器中使用下面的一段代码来推送新的按钮:

self.navigationController?.navigationBar.backIndicatorImage = UIImage(named: "close")
self.navigationController?.navigationBar.backIndicatorTransitionMaskImage = UIImage(named: "close")
self.navigationItem?.backBarButtonItem = UIBarButtonItem(title: "", style: .plain, target: nil, action: nil)

为了更普遍的使用,请执行以下操作:

Create a universal function as follows: func addCustomizedBackBtn(navigationController: UINavigationController?, navigationItem: UINavigationItem?) { navigationController?.navigationBar.backIndicatorImage = UIImage(named: "close") navigationController?.navigationBar.backIndicatorTransitionMaskImage = UIImage(named: "close") navigationItem?.backBarButtonItem = UIBarButtonItem(title: "", style: .plain, target: nil, action: nil) } Then use it in the view controllers as follows: addCustomizedBackBtn(navigationController: self.navigationController, navigationItem: self.navigationItem)

你可以子类化UINavigationController,将自己设置为委托,并在委托方法navigationController:willShowViewController:animated中设置backBarButtonItem:

@interface Custom_NavigationController : UINavigationController <UINavigationControllerDelegate>

@end

@implementation Custom_NavigationController

- (void)viewDidLoad
{
    [super viewDidLoad];

    self.delegate = self;
}

#pragma mark - UINavigationControllerDelegate

- (void)navigationController:(UINavigationController *)navigationController     willShowViewController:(UIViewController *)viewController animated:(BOOL)animated
{
    viewController.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"" style:UIBarButtonItemStylePlain target:nil action:nil];
}

@end

为了补充上面托马斯·C的回答,有时只放一个空格是行不通的,你必须不断地添加空格。

当你看到“导航项”下的“栏按钮项-”时,你就知道你成功了。这是在文档大纲(编辑器->显示文档大纲)。一旦你看到上面的图片,你可以删除一些空格,看看它是否仍然有效。