更改UINavigationController标题的字体

Question

我可以更改我的UINavigationController的字体吗？- > 标题

Answer 1

从iOS 5开始,您可以通过外观代理更改字体.

https://developer.apple.com/documentation/uikit/uiappearance

以下将为所有UINavigationControllers设置标题字体.

  NSMutableDictionary *titleBarAttributes = [NSMutableDictionary dictionaryWithDictionary: [[UINavigationBar appearance] titleTextAttributes]];
  [titleBarAttributes setValue:[UIFont fontWithName:@"Didot" size:16] forKey:NSFontAttributeName];
  [[UINavigationBar appearance] setTitleTextAttributes:titleBarAttributes];

要设置后退按钮的字体,请执行以下操作:

  NSMutableDictionary *attributes = [NSMutableDictionary dictionaryWithDictionary: [[UIBarButtonItem appearance] titleTextAttributesForState:UIControlStateNormal]];
  [attributes setValue:[UIFont fontWithName:@"Didot" size:12] forKey:NSFontAttributeName];
  [[UIBarButtonItem appearance] setTitleTextAttributes:attributes forState:UIControlStateNormal];

要设置iOS 11+中可用的大型标题的字体,请执行以下操作:

if (@available(iOS 11.0, *)) {
    NSMutableDictionary *largeTitleTextAttributes = [NSMutableDictionary dictionaryWithDictionary: [[UINavigationBar appearance] largeTitleTextAttributes]];
    [largeTitleTextAttributes setValue:[UIFont fontWithName:@"Didot" size:32] forKey:NSFontAttributeName];
    [[UINavigationBar appearance] setLargeTitleTextAttributes:largeTitleTextAttributes];
}

Answer 2

对于iOS8 +,您可以使用:

[self.navigationController.navigationBar setTitleTextAttributes:@{ NSFontAttributeName: [UIFont fontWithName:@"MyFont" size:18.0f],
                                                                   NSForegroundColorAttributeName: [UIColor whiteColor]
                                                                   }];

Answer 3

标题视图可以是任何视图.因此,只需创建一个UILabel或其他更改字体的位置,并将该新视图分配给导航项的title属性.

Answer 4

一个例子:

-(void) viewWillAppear:(BOOL)animated {

    [super viewWillAppear:animated];

    CGRect frame = CGRectMake(0, 0, 400, 44);
    UILabel *label = [[[UILabel alloc] initWithFrame:frame] autorelease];
    label.backgroundColor = [UIColor clearColor];
    label.font = [FontHelper fontFor:FontTargetForNavigationHeadings];
    label.textAlignment = UITextAlignmentCenter;
    label.textColor = [UIColor whiteColor];
    label.text = self.navigationItem.title;
    // emboss in the same way as the native title
    [label setShadowColor:[UIColor darkGrayColor]];
    [label setShadowOffset:CGSizeMake(0, -0.5)];
    self.navigationItem.titleView = label;
}