如何設置導航欄標題的字體大小

Question

我嘗試設置導航標題和其他項目的fontsize。 我怎樣才能做到這一點 ？

我們可以使用uinavigationbar.setTitleTextAttributes方法設置此方法，但是這個方法不存在（不再存在）

有人知道該怎么辦嗎？

navigationBar = UINavigationBar(frame: CGRectMake(0, 0, fDialogWidth, navbarHeigth))
        let navigationItem = UINavigationItem()
        navigationItem.title = sTitle;
        // Create left and right button for navigation item
        let leftButton = UIBarButtonItem(title: sBacklabel, style: UIBarButtonItemStyle.Plain, target: self, action: "backAction:")
        let rightButton = UIBarButtonItem(title: saddBookmark, style: UIBarButtonItemStyle.Plain, target: self, action: "addBookmarkAction:")



        // Create two buttons for the navigation item
        navigationItem.leftBarButtonItem = leftButton
        navigationItem.rightBarButtonItem = rightButton
        navigationBar.items = [navigationItem];

        navigationBar.frame = CGRectMake(0, 0, screenwidth, navbarHeigth);

Answer 1

將這些行添加到viewDidLoad()方法：

self.navigationController?.navigationBar.topItem?.title = "Your title" 
self.navigationController?.navigationBar.titleTextAttributes = [ NSFontAttributeName: UIFont(name: "Your Font", size: 34)!, NSForegroundColorAttributeName: UIColor.whiteColor()]

Answer 2

嘗試這個...

 let titleAttributes = [
        NSFontAttributeName: UIFont(name: "your font name", size: 15)!
    ]
 self.navigationController?.navigationBar.titleTextAttributes = titleAttributes

如果您正在使用系統字體

 let titleAttributes = [
        NSFontAttributeName: UIFont.systemFontOfSize(15)
 ]
 self.navigationController?.navigationBar.titleTextAttributes = titleAttributes

Answer 3

更新swift 4

大概你想用系統fontsize 30和黃色設置UINavigationbar的tittle。 語法可能如下所示：

navigationItem.title = "Your Title"    
navigationController?.navigationBar.titleTextAttributes = [NSAttributedStringKey.font: UIFont.systemFont(ofSize: 30),NSAttributedStringKey.foregroundColor: UIColor.yellow]