Change the font size of UISearchBar

Question

How can I change the font size of UISearchBar ?

Answer 1

The accepted answer is not the recommended way of applying font for UISearchBar. Better to avoid this approach and use the answers provided by @rafalkitta or @josema.

But be cautious, this will be applied to all the search bars through out the app. In order to apply this approach to a particular search bar: create a subclass of UISearchBar and set the defaultTextAttributes on the UITextField like below

Swift4:

    let defaultTextAttribs = [NSAttributedStringKey.font.rawValue: UIFont.boldSystemFont(ofSize: 21.0), NSAttributedStringKey.foregroundColor.rawValue:UIColor.red]
    UITextField.appearance(whenContainedInInstancesOf: [CustomSearchBar.self]).defaultTextAttributes = defaultTextAttribs

Obj-C(iOS11)

    UIFont *font = [UIFont boldSystemFontOfSize:21.0];
    UIColor *color = [UIColor redColor];
    NSDictionary * defaultTextAttribs = @{NSFontAttributeName:font, NSForegroundColorAttributeName: color};
    [UITextField appearanceWhenContainedInInstancesOfClasses:@[[CustomSearchBar class]]].defaultTextAttributes = defaultTextAttribs;