带有UIImage标题的导航栏

Question

我想通过使用徽标图像（而不是纯文本）作为导航栏的标题来自定义应用程序的外观。当我使用此代码let logo = UIImage(named: "logo.png")self.navigationItem.titleView = logo;我收到错误“ UIImage无法转换为UIView”。如何正确执行此操作？

Answer 1

放在里面 UIImageView

let logo = UIImage(named: "logo.png")

let imageView = UIImageView(image:logo)

self.navigationItem.titleView = imageView

Answer 2

我用这个 它适用于iOS 8

override func viewDidLoad() {

    super.viewDidLoad()

    // Do any additional setup after loading the view.

    let image = UIImage(named: "YOURIMAGE")

    navigationItem.titleView = UIImageView(image: image)

}

这是一个示例，您如何使用CGRect做到这一点。

override func viewDidLoad() {

    super.viewDidLoad()

    // Do any additional setup after loading the view.

    let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 38, height: 38))

    imageView.contentMode = .ScaleAspectFit

    let image = UIImage(named: "YOURIMAGE")

    imageView.image = image

    navigationItem.titleView = imageView

}

希望这会有所帮助。

Answer 3

对于Swift 4，您可以调整imageView的大小

 let logoContainer = UIView(frame: CGRect(x: 0, y: 0, width: 270, height: 30))

 let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 270, height: 30))

 imageView.contentMode = .scaleAspectFit

 let image = UIImage(named: "your_image")

 imageView.image = image

 logoContainer.addSubview(imageView)

 navigationItem.titleView = logoContainer