ios - 如何读取UINavigationController中标题的字体？

Question

如何获取UINavigationController中标题的UIFont？我试图像这样阅读它:

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.title = @"Some text here";
}

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
    NSLog(@"navigation bar title attributes = %@", self.navigationController.navigationBar.titleTextAttributes);
    NSLog(@"title font = %@", [self.navigationController.navigationBar.titleTextAttributes objectForKey:UITextAttributeFont]);
}

结果令人失望。 titleTextAttributes 字典只包含一个键/值，不是字体。

navigation bar title attributes = {
    NSColor = "UIDeviceWhiteColorSpace 1 1";
}
title font = (null)

Answer 1

您可以访问导航栏的 subview 以获取标题和字体

for (UIView *sv in self.navigationController.navigationBar.subviews)
{
    if (sv.subviews.count > 0 && [sv.subviews[0] isKindOfClass:[UILabel class]])
    {
        UILabel *lbl = (UILabel *)sv.subviews[0];
        NSLog(@"%@",lbl.font);
        break;
    }
}

控制台输出

<UICTFont: 0xd8a3e50> font-family: "Helvetica-Light"; font-weight: normal; font-style: normal; font-size: 16.00pt