更改UISearchBar中的取消按钮字体

Question

我正在自定义搜索栏并努力改变＆＃34;取消＆＃34;的字体。在搜索栏中键入时弹出的按钮。到目前为止，这是我尝试的（将UIView转换为UIBarButton失败）：

for subView in controller.searchBar.subviews  {

    if let cancelButton = subView as? UIBarButtonItem {
        cancelButton.setTitleTextAttributes([ NSFontAttributeName: font ], forState: UIControlState.Normal)
    }
}

Answer 1

迅速：

if #available(iOS 9.0, *) {
     UIBarButtonItem.appearanceWhenContainedInInstancesOfClasses([UISearchBar.self]).setTitleTextAttributes([NSFontAttributeName : UIFont.systemFontOfSize(15, weight: UIFontWeightLight)], forState: .Normal)
} else {
     // Fallback on earlier versions
}

Objective-C：

[[UIBarButtonItem appearanceWhenContainedIn:[UISearchBar class], nil] setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:
                                                  [UIColor blueColor], 
                                                  UITextAttributeTextColor, 
                                                  [UIColor darkGrayColor], 
                                                  UITextAttributeTextShadowColor, 
                                                  [NSValue valueWithUIOffset:UIOffsetMake(0, -1)], 
                                                  UITextAttributeTextShadowOffset,
                                                  nil] 
                                        forState:UIControlStateNormal];

Answer 2

在包含搜索栏的视图中，例如：

class ViewController: UIViewController {

    @IBOutlet weak var searchBar: UISearchBar!

    // ...

    override func viewDidLoad() {
        super.viewDidLoad()

        // ... other init code

        // search bar "Cancel" color
        searchBar.tintColor = UIColor.redColor();

        // search bar "Cancel": custom text and font
        for sView in searchBar.subviews {
            for ssView in sView.subviews {
                if ssView.isKindOfClass(UIButton.self) {
                    let cancelButton = ssView as! UIButton
                    cancelButton.setTitle("Custom", forState: .Normal)
                    cancelButton.titleLabel?.font = UIFont(name: "GillSans-BoldItalic", size: 14.0)
                    break
                }
            }
        }
    }

    // ...
}

产生以下结果：

对于不同的字体，请参阅http://iosfonts.com，有关颜色，请参阅UIColor Class Reference。