在UINavigationController的后退按钮更改字体(change font of ba

我试图改变文本的字体颜色在我的后退按钮在我UINavigationControllerBar

    [[UIBarButtonItem appearance] setTitleColor:[UIColor redColor] forState:UIControlStateNormal];

给我这个错误：[_UIBarItemAppearance setTitleColor：forState：]：无法识别的选择发送到实例0x69aeb70'

任何帮助吗？ 谢谢！

Answer 1:

使用此相反，默认使用的功能在iOS 5中

UIBarButtonItem *backbutton =  [[UIBarButtonItem alloc] initWithTitle:@"back" style:UIBarButtonItemStyleBordered target:nil action:nil];    

    [backbutton setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:
                                                   [UIColor blackColor],UITextAttributeTextColor,[UIFont fontWithName:TEXTFONT size:16.0f],UITextAttributeFont,
                                                   nil] forState:UIControlStateNormal]; 

Answer 2:

NSMutableDictionary *attributes = [NSMutableDictionary dictionary];
[attributes setValue:[UIColor colorWithRed:(163.0f/255.0f) green:(0.0f) blue:(0.0f) alpha:1.0f] forKey:UITextAttributeTextColor];
[attributes setValue:[UIColor clearColor] forKey:UITextAttributeTextShadowColor];
[attributes setValue:[NSValue valueWithUIOffset:UIOffsetMake(0.0, 0.0)] forKey:UITextAttributeTextShadowOffset];
[[UIBarButtonItem appearance] setTitleTextAttributes:attributes forState:UIControlStateNormal];

似乎工作！

Answer 3:

[[UIBarButtonItem appearance] setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:
                                                     [UIFont fontWithName:kDefaultFont size:16.0f],UITextAttributeFont,
                                                     nil] forState:UIControlStateNormal];

Answer 4:

和美丽的解决方案iOS7 +（因为属性名称），：

NSShadow *shadow = [NSShadow new];
[shadow setShadowColor: [UIColor colorWithWhite:0.0f alpha:0.750f]];
[shadow setShadowOffset: CGSizeMake(0.0f, 1.0f)];

[[UIBarButtonItem appearance] setTitleTextAttributes:@{
        NSFontAttributeName: [UIFont systemFontOfSize:24],
        NSForegroundColorAttributeName: [UIColor colorWithWhite:0.2 alpha:1.0],
        NSShadowAttributeName: shadow,
} forState:UIControlStateNormal];

Answer 5:

解决方案在斯威夫特4：

UIBarButtonItem.appearance().setTitleTextAttributes(
[
    NSAttributedStringKey.font: UIFont(name: "MyriadPro-SemiboldCond", size: 16)!,
    NSAttributedStringKey.foregroundColor: UIColor.white
], for: .normal)

在AppDelegate中添加这一点，它会被应用到应用的所有按钮。

文章来源: change font of back button on uinavigationcontroller