[英]iOS - UIBarButtonItem - Back Button title vertical position not adjusting
[英]UIBarButtonItem remove Back Button Title - iOS 11
另一种方法是为您的navigationController设置UINavigationControllerDelegate
并删除其函数中的标题。
class NoBackButtonTitleNavigationDelegate: UINavigationControllerDelegate {
func navigationController(
_ navigationController: UINavigationController,
willShow viewController: UIViewController,
animated: Bool
) {
viewController.navigationItem.backBarButtonItem = UIBarButtonItem(title: " ", style: .plain, target: nil, action: nil)
}
}
使用此代码,
var newBackButton = UIBarButtonItem(image: UIImage(named: "back"), style: .plain, target: self, action: #selector(self.back))
navigationItem?.leftBarButtonItem = newBackButton
创建导航控制器类,如下所示。 将此“CustomNavViewController”分配给StoryBoard中的UINavigationController
class CustomNavViewController: UINavigationController,UINavigationControllerDelegate
{
override func viewDidLoad() {
super.viewDidLoad()
self.delegate = self
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func navigationController(
_ navigationController: UINavigationController,
willShow viewController: UIViewController,
animated: Bool
) {
viewController.navigationItem.backBarButtonItem = UIBarButtonItem(title: " ", style: .plain, target: nil, action: nil)
}
}
因此,无需在每个viewControllers中执行此操作。 最后从AppDelegate类中删除以下行,如果存在,
UIBarButtonItem.appearance().setBackButtonTitlePositionAdjustment(UIOffsetMake(0, -60), for:UIBarMetrics.default)
而不是垂直移动标题,您可以水平移动。 如果标题很长,你可以使它的颜色透明。 工作得很好我:
let barButtonItemAppearance = UIBarButtonItem.appearance()
barButtonItemAppearance.setTitleTextAttributes([NSAttributedStringKey.foregroundColor: UIColor.clear], for: .normal)
barButtonItemAppearance.setBackButtonTitlePositionAdjustment(UIOffsetMake(-200, 0), for:UIBarMetrics.default)
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