保留图标,从"后退"按钮中删除文本

Question

我想从后退按钮中删除文本,但我想保留图标.我试过了

let backButton = UIBarButtonItem(title: "", style: UIBarButtonItemStyle.Plain, target: navigationController, action: nil)
navigationItem.leftBarButtonItem = backButton

但是,这会完全删除文本和图标.

Answer 1

我知道这已经有了答案,但您也可以在代码中执行此操作(如果您正在使用nib)

navigationItem.backBarButtonItem = UIBarButtonItem(title: "", style: .plain, target: nil, action: nil)

在第一个视图控制器中添加上面的内容.

请注意,您需要为每个正在推送的视图控制器执行此操作.因此,如果您有3个视图控制器,并且想要从所有视图控制器中删除背面文本,则必须在视图控制器1和2中添加该行.

Answer 2

@ rmd2的方法几乎是正确的,但您应该选择后退按钮指向的控制器的导航栏并输入" "后退按钮字段.

Answer 3

后退按钮的文本取决于主视图的标题.

诀窍是如果主视图消失则清除标题,如果再次显示则再次设置它:

override func viewWillDisappear(_ animated: Bool) {
    super.viewWillDisappear(true)

    // needed to clear the text in the back navigation:
    self.navigationItem.title = " "
}

override func viewWillAppear(_ animated: Bool) {

    super.viewWillAppear(animated)
    self.navigationItem.title = "My Title"
}

Answer 4

如果你想从一个推视图控制器删除后退按钮的标题,比方说<Settings要<在subSettingsViewController,那么你已经设置backBarButtonItem冠军SettingsViewController的viewWillDisappear()方法.

Objective-C的:

- (void)viewWillDisappear:(BOOL)animated
    [super viewWillDisappear:animated];
    self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"" style:self.navigationItem.backBarButtonItem.style target:nil action:nil];
}

迅速:

override func viewWillDisappear(_ animated: Bool) {
    super.viewWillDisappear(animated)
    navigationItem.backBarButtonItem = UIBarButtonItem(title: "", style: .plain, target: nil, action: nil)
}

Answer 5

经过大量搜索,我找到了最好的解决方案,这将影响用Swift 4.2编写的所有viewControllers

extension UIViewController {
            open override func awakeFromNib() {
                navigationItem.backBarButtonItem = UIBarButtonItem(title: "", style: .plain, target: nil, action: nil)
        }  
}

Answer 6

如果你想要后面的箭头,那么下面的代码放入AppDelegate文件到didFinishLaunchingWithOptions方法.

对于斯威夫特

let BarButtonItemAppearance = UIBarButtonItem.appearance()
BarButtonItemAppearance.setTitleTextAttributes([.foregroundColor: UIColor.clear], for: .normal)

Answer 7

在我的情况下,对于自定义图标和标题,这就成功了(Swift 4)

    let imgBack = UIImage(named: "ic_back")

    navigationController?.navigationBar.backIndicatorImage = imgBack
    navigationController?.navigationBar.backIndicatorTransitionMaskImage = imgBack

    navigationItem.leftItemsSupplementBackButton = true
    navigationController?.navigationBar.topItem?.backBarButtonItem = UIBarButtonItem(title: "", style: .plain, target: self, action: nil)

Answer 8

这对我有用

override func viewDidLoad() {
    super.viewDidLoad()
    navigationController?.navigationBar.topItem?.backBarButtonItem = UIBarButtonItem(title: "", style: .plain, target: nil, action: nil)
}

Answer 9

我通过在前一个ViewController的StoryBoard标题上添加""来解决了这个问题.只是一个空间,不是空的; D

Answer 10

终于找到了完美的解

只需添加一个透明图像,然后在AppDelegate中添加以下代码即可.

UIBarButtonItem.appearance().setBackButtonBackgroundImage(#imageLiteral(resourceName: "transparent"), for: .normal, barMetrics: .default)

Answer 11

在快速4

self.navigationController?.navigationBar.topItem?.title = ""

Answer 12

对于斯威夫特4+ 把这些线成AppDelegate在didFinishLaunchingWithOptions

let BarButtonItemAppearance = UIBarButtonItem.appearance()

BarButtonItemAppearance.setTitleTextAttributes([NSAttributedStringKey.foregroundColor: UIColor.clear], for: .normal)      
BarButtonItemAppearance.setBackButtonTitlePositionAdjustment(UIOffsetMake(-200, 0), for:UIBarMetrics.default)

Answer 13

如果您有一个 ViewControllerA 并且想要导航到 ViewControllerB，则在 ViewControllerA 中，您应该使用新的 UIBarButtonItem 将当前导航项设置为带有空格的字符串，然后再推送到另一个视图控制器：

将标题设置为带空格的字符串，不能设置nil或""（空字符串），因为默认值为nil

let backItem = UIBarButtonItem()
backItem.title = " "
navigationItem.backBarButtonItem = backItem
let controllerB = ViewControllerB()
navigationController?.pushViewController(controllerB, animated: true)

Answer 14

将此代码放在每个 VC 中，这会推动另一个

navigationItem.backBarButtonItem = UIBarButtonItem(title: "", style: .plain, target: nil, action: nil)

Answer 15

您可以使用 的委托方法从后退按钮中删除文本UINavigationController。

class CustomNavigationController: UINavigationController {

    override func viewDidLoad() {
        super.viewDidLoad()
        self.delegate = self
    }

}

extension CustomNavigationController: UINavigationControllerDelegate {
    
    func navigationController(_ navigationController: UINavigationController, willShow viewController: UIViewController, animated: Bool) {
        viewController.navigationItem.backBarButtonItem = UIBarButtonItem(title: String(), style: .plain, target: nil, action: nil)
    }
    
}