如何删除后退按钮的文本。
当前返回按钮:
<返回
需要的后退按钮:
< 其他任何东西
这些都没有奏效:
self.navigationItem.backBarButtonItem?.title = "Back"
self.backItem?.title = ""
self.navigationController?.navigationBar.backItem?.title = ""
self.navigationItem.backBarButtonItem?.title = ""
self.navigationController?.navigationItem.backBarButtonItem?.title="Back"
self.navigationController?.navigationBar.backItem?.title = ""
self.navigationController?.navigationItem.backBarButtonItem?.title
当前回答
如果你对任何多星建议有问题，确保你在viewDidLoad()中注册你的UITableViewCells，而不是从init()
其他回答
Swift 4 -在按任何视图控制器之前配置后退按钮
// if you want to remove the text
navigationItem.backBarButtonItem = UIBarButtonItem()
// if you want to modify the text to "back"
navigationItem.backBarButtonItem = UIBarButtonItem(title: "back", style: .plain, target: nil, action: nil)
虽然这些答案解决了问题，但这可能是一些有用的
class MainNavigatioController: UINavigationController {
override func pushViewController(_ viewController: UIViewController, animated: Bool) {
// first
let backItem = UIBarButtonItem()
backItem.title = "رجوع"
self.viewControllers.last?.navigationItem.backBarButtonItem = backItem
// then
super.pushViewController(viewController, animated: animated)
}
}
有两种方法。
1.在previousViewController.viewDidLoad()中
let backBarBtnItem = UIBarButtonItem()
backBarBtnItem.title = "back"
navigationItem.backBarButtonItem = backBarBtnItem
2.在currentviewcontroller。viewdidappear()中
let backBarBtnItem = UIBarButtonItem()
backBarBtnItem.title = "back"
navigationController?.navigationBar.backItem?.backBarButtonItem = backBarBtnItem
原因:backButton来自navigationBar.backItem。backBarButtonItem，第一种方法很明显。在currentViewController.viewDidLoad()中，我们无法获得backItem的引用，因为在viewDidAppear()中，navigationBar将navigationView推入了它的堆栈。因此我们可以在currentViewController.viewDidAppear()中对backItem进行更改
更多细节，你可以看到文档:UINavigationBar
下面的代码可以添加到视图控制器中，从你想要更改返回按钮文本的视图控制器中
斯威夫特5
self.navigationItem.backBarButtonItem = UIBarButtonItem(title: "", style: .plain, target: self, action: nil)
例如:-
ViewController1 ViewController2
假设我们想要更新回viewcontroller2的标题，我们从viewcontroller1推送viewcontroller2。
那么您可以使用以下代码:-
let vc2 = storyboard.instantiateViewController(withIdentifier: "ViewController2")
self.navigationItem.backBarButtonItem = UIBarButtonItem(title: "your custom back button title", style: .plain, target: self, action: nil)
self.navigationController?.pushViewController(vc2, animated: true)
后退按钮文本和彩色文本:
navigationController?.navigationBar.tintColor = .red
navigationController?.navigationBar.topItem?.backButtonTitle = "Hi"
