设置NavigationBar标题字体

Question

我一直在寻找一种方法来更改navigationBar中的标题字体，并且进行了以下尝试，但是没有任何反应，该字体在UILabel上工作正常，依此类推。

UINavigationBar.appearance().titleTextAttributes = [
    NSFontAttributeName: UIFont(name: "SourceSansPro-Regular", size: 18) ?? UIFont.systemFontOfSize(18)
]

Answer 1

[[UINavigationBar appearance] setTitleTextAttributes:@{
    UITextAttributeTextColor : [UIColor whiteColor],
    UITextAttributeTextShadowColor : [UIColor blackColor],
    UITextAttributeTextShadowOffset : [NSValue valueWithUIOffset:UIOffsetMake(1, 0)],
    UITextAttributeFont : [UIFont fontWithName:@"System" size:25.0]
}];

迅速

        UINavigationBar.appearance().titleTextAttributes = [UITextAttributeTextColor: UIColor.whiteColor(), 
    UITextAttributeTextShadowColor: UIColor.blackColor(), 
    UITextAttributeTextShadowOffset: NSValue(UIOffset: UIOffsetMake(1, 0)), 
UITextAttributeFont: UIFont(name: "System", size: 25.0)]