Question

我试图更改UIBarButtonItem字体。 ViewControllers加载时效果很好。但是，如果我点击条形按钮，或向右滑动就像移动到上一个ViewController（但然后回到当前的ViewController），字体会变回系统字体。这是我在AppDelegate中设置的内容：

NSDictionary* barButtonItemAttributes = @{NSFontAttributeName: [UIFont fontWithName:@"SourceSansPro-Light" size:20.0f]};
[[UIBarButtonItem appearance] setTitleTextAttributes: barButtonItemAttributes forState:UIControlStateNormal];
[[UIBarButtonItem appearance] setTitleTextAttributes: barButtonItemAttributes forState:UIControlStateHighlighted];
[[UIBarButtonItem appearance] setTitleTextAttributes: barButtonItemAttributes forState:UIControlStateSelected];
[[UIBarButtonItem appearance] setTitleTextAttributes: barButtonItemAttributes forState:UIControlStateDisabled];

这是我的观点的一个例子WillAppear：

- (void) viewWillAppear:(BOOL)animated {
    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Done" style:UIBarButtonItemStylePlain target:self action:@selector(doneButtonPressed)];
    self.navigationItem.rightBarButtonItem.tintColor = [UIColor colorWithRed:141.0/255.0 green:209.0/255.0 blue:205.0/255.0 alpha:1.0];
}

我是以某种方式更改字体，还是我滥用外观代理？

Answer 1

问题是tintColor设置与标题文本属性冲突。注释掉那条线，一切都会很好。

如果您要使用标题文本属性，请将文本颜色合并到这些属性中：

NSDictionary* barButtonItemAttributes =
@{NSFontAttributeName:
      [UIFont fontWithName:@"Georgia" size:20.0f],
  NSForegroundColorAttributeName:
      [UIColor colorWithRed:141.0/255.0 green:209.0/255.0 blue:205.0/255.0 alpha:1.0]  
 };

Answer 2

通过在viewDidLoad方法中使用此方法，您可以一次性设置自定义文本，字体，大小等。

UIView *customBarButtonView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 50, 30)];

UIButton *buttonDone = [UIButton buttonWithType:UIButtonTypeSystem];
[buttonDone addTarget:self action:@selector(doneButtonPressed:) forControlEvents:UIControlEventTouchUpInside];

buttonDone.frame = CGRectMake(10, 0, 50, 30);

buttonDone.titleLabel.textColor = [UIColor colorWithRed:141.0/255.0 green:209.0/255.0 blue:205.0/255.0 alpha:1.0];
buttonDone.titleLabel.font = [UIFont fontWithName:@"SourceSansPro-Light" size:20.0f];
[buttonDone setTitle:@"Done" forState:UIControlStateNormal];
[customBarButtonView addSubview:buttonDone];

self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithCustomView:customBarButtonView];

Answer 3

_myrButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"French KeyBoard" style:UIBarButtonItemStylePlain target:self action:@selector(RbuttonItemdown:)];

NSDictionary* itemTextAttributes = @{NSFontAttributeName:[UIFont fontWithName:@"Georgia" size:12.0f], NSForegroundColorAttributeName:[UIColor blueColor], NSBackgroundColorAttributeName:[UIColor lightGrayColor]};

[_myrButtonItem setTitleTextAttributes:itemTextAttributes forState:UIControlStateNormal];

[self.navigationItem setRightBarButtonItem:_myrButtonItem];

您可以使用以下所有内容：

NSString *const  NSFontAttributeName ;
NSString *const  NSParagraphStyleAttributeName ;
NSString *const  NSForegroundColorAttributeName ;
NSString *const  NSBackgroundColorAttributeName ;
NSString *const  NSLigatureAttributeName ;
NSString *const  NSKernAttributeName ;
NSString *const  NSStrikethroughStyleAttributeName ;
NSString *const  NSUnderlineStyleAttributeName ;
NSString *const  NSStrokeColorAttributeName ;
NSString *const  NSStrokeWidthAttributeName ;
NSString *const  NSShadowAttributeName ;
NSString *const  NSTextEffectAttributeName ;
NSString *const  NSAttachmentAttributeName ;
NSString *const  NSLinkAttributeName ;
NSString *const  NSBaselineOffsetAttributeName ;
NSString *const  NSUnderlineColorAttributeName ;
NSString *const  NSStrikethroughColorAttributeName ;
NSString *const  NSObliquenessAttributeName ;
NSString *const  NSExpansionAttributeName ;
NSString *const  NSWritingDirectionAttributeName ;
NSString *const  NSVerticalGlyphFormAttributeName;

点击时，iOS 7 UIBarButtonItem字体会发生变化

3 个答案: