更改UISearchBar iOS 7的字体大小和字体样式

Question

如何在iOS 7中更改UISearchBar的字体大小和字体样式？

UITextField *textField = [[searchBar subviews] objectAtIndex:1];
[textField setFont:[UIFont fontWithName:@"Helvetica" size:20]];

在iOS 6中工作,但它在iOS 7中崩溃了

Answer 1

试试这个,它适用于iOS 5.0及以上版本:( iOS 7也)

- (void)viewDidLoad
{

[[UITextField appearanceWhenContainedIn:[UISearchBar class], nil] setFont:[UIFont fontWithName:@"Helvetica" size:20]];

}

适用于iOS 8

- (void)viewDidLoad
    {

[[UITextField appearanceWhenContainedIn:[UISearchBar class], nil] setDefaultTextAttributes:@{
            NSFontAttributeName: [UIFont fontWithName:@"Helvetica" size:20],
      }];

    }

Answer 2

在iOS 7.1上,我接受的答案对我不起作用.我不得不改变它:

[[UITextField appearanceWhenContainedIn:[UISearchBar class], nil] setDefaultTextAttributes:@{
            NSFontAttributeName: [UIFont fontWithName:@"Avenir-Heavy" size:20.],
}];

Answer 3

iOS 10 Swift 3:

UITextField.appearance(whenContainedInInstancesOf: [UISearchBar.self]).defaultTextAttributes = [NSFontAttributeName:UIFont(name: "Avenir-Heavy", size: 22)!]