我需要从AppDelegate更改UINavigationBar后退栏按钮文本,以将更改应用到我的应用程序中的所有视图.
UINavigationBar.appearance().titleTextAttributes = [
NSFontAttributeName: UIFont(name: "MyCustomFont",size: 20)!
]
但我不知道如何访问左侧栏按钮对其进行更改.
解决方法
斯威夫特3.0,4.0
只需通过UINavigationItem的扩展即可实现它.根据许多搜索,无法使用app delegate更改左按钮文本.
extension UINavigationItem{
override open func awakeFromNib() {
super.awakeFromNib()
let backItem = UIBarButtonItem()
backItem.title = "Hello"
if let font = UIFont(name: "Copperplate-Light",size: 32){
backItem.setTitleTextAttributes([NSFontAttributeName:font],for: .normal)
}else{
print("Font Not available")
}
/*Changing color*/
backItem.setTitleTextAttributes([NSForegroundColorAttributeName: UIColor.green],for: .normal)
self.backBarButtonItem = backItem
}
}
更新：
您可以在didFinishLaunchingWithOptions上更改AppDelegate的后退按钮箭头颜色,
/*It will change back arrow color only if you use backItem.setTitleTextAttributes,else it will change whole text color*/ UINavigationBar.appearance().tintColor = UIColor.orange
