要更改所有 UINavigationBars
中出现的所有 UIBarButtonItems
的文本外观,请在 application:didFinishLaunchingWithOptions:
中执行以下操作:
[[UIBarButtonItem appearanceWhenContainedIn:[UINavigationBar class], nil] setTitleTextAttributes:
@{UITextAttributeTextColor:[UIColor blackColor],
UITextAttributeTextShadowOffset:[NSValue valueWithUIOffset:UIOffsetMake(0, 1)],
UITextAttributeTextShadowColor:[UIColor whiteColor],
UITextAttributeFont:[UIFont boldSystemFontOfSize:12.0]
}
forState:UIControlStateNormal];
更新:适用于iOS7的版本
NSShadow *shadow = [[NSShadow alloc] init];
shadow.shadowOffset = CGSizeMake(0.0, 1.0);
shadow.shadowColor = [UIColor whiteColor];
[[UIBarButtonItem appearanceWhenContainedIn:[UINavigationBar class], nil]
setTitleTextAttributes:
@{NSForegroundColorAttributeName:[UIColor blackColor],
NSShadowAttributeName:shadow,
NSFontAttributeName:[UIFont boldSystemFontOfSize:12.0]
}
forState:UIControlStateNormal];
Swift:
注意:这会更改所有 UIBarButtonItem
的实例,而不仅仅是那些包含在 UINavigationBar
中的实例。
UIBarButtonItem.appearance()
.setTitleTextAttributes([NSFontAttributeName : ExamplesDefaults.fontWithSize(22)],
forState: UIControlState.Normal)
Swift3:
UIBarButtonItem.appearance()
.setTitleTextAttributes([NSFontAttributeName: UIFont(name: "FontName-Regular", size: 14.0)!],
for: .normal)