Updated graphics can be retrieved using the UIKit Artwork Extractor . (Or get an update icon from one of the many free iphone icon sets, like Glyphish )
To place it in a UITextField, as in Safari, set the rightView UITextField property to a UIImageView or UIButton with the image set to the updated image.
UITextField* myTextField = [[[UITextField alloc] initWithFrame: CGRectMake(0,0,200,44)] autorelease]; myTextField.rightView = [[[UIImageView alloc] initWithImage: [UIImage imageNamed: @"UIButtonBarRefresh.png"]] autorelease];
You need to use UIButton instead of UIImageView if you want to receive TouchUpInside notification for update button.
source share