更改UISearchBar中的“取消”按鈕字體

Question

我正在自定義搜索欄，並努力更改在搜索欄中鍵入內容時彈出的“取消”按鈕的字體。 到目前為止，這是我嘗試過的方法（將UIView廣播到UIBarButton失敗）：

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
}

目標-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

在包含搜索欄的視圖中，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
                }
            }
        }
    }

    // ...
}

產生以下結果：

對於不同的字體，請參見http://iosfonts.com ；對於顏色，請參見《 UIColor類參考》 。