swift：导航栏中的标题字体

Question

在AppDelegate.swift中的

我有以下代码：

let nav1 = UINavigationController()
    let mainView = ViewController(nibName: nil, bundle: nil) //ViewController = Name of your controller
    nav1.viewControllers = [mainView]
nav1.navigationBar.topItem?.title = "JT"
    nav1.navigationController?.navigationBar.titleTextAttributes = [ NSFontAttributeName: UIFont(name: "AvenirNext-UltraLight", size: 24)!,  NSForegroundColorAttributeName: UIColor.whiteColor()]

但最后一行不会更改导航栏标题的字体 我应该怎么做？

Answer 1

您可以通过Storyboard更改导航栏标题属性或尝试此操作：

nav1.navigationBar.titleTextAttributes = [NSFontAttributeName: UIFont(name: "AvenirNext-UltraLight", size: 24)!,  NSForegroundColorAttributeName: UIColor.whiteColor()]

Answer 2

您可以像这样创建自己的titleView：

 let label=UILabel(frame: nav1.navigationBar.frame)
    label.textAlignment=NSTextAlignment.Center
    label.font=UIFont(name: "FONT HERE", size: 27)
    label.text="TITLE HERE"
    label.textColor=UIColor.blackColor()
    for item in nav1.navigationBar.items!{
       item.titleView=label 
    }