Swift 中的可点击图像作为导航栏标题

Question

我浏览了这里讨论的几个主题：

设置标题图片
为标题使用按钮

但是，我试图将两者结合起来，即，将可点击的图像（按钮）作为标题。

不幸的是，虽然下面的代码编译图像分配为按钮时不显示。有什么建议吗？

func addNavBarImage() {
    let navController = navigationController!

    let button =  UIButton(type: .custom)
    var image = UIImage(named: "textLogo")
    image = image?.withRenderingMode(.alwaysOriginal)

    let bannerWidth = navController.navigationBar.frame.size.width
    let bannerHeight = navController.navigationBar.frame.size.height

    let bannerX = bannerWidth / 2 - image!.size.width  / 2
    let bannerY = bannerHeight / 2 - image!.size.height / 2

    button.frame = CGRect(x: bannerX, y: bannerY, width: bannerWidth, height: bannerHeight)
    button.imageView?.contentMode = .scaleAspectFit
    button.imageView?.image = image

    button.addTarget(self, action: #selector(self.logoTapped), for: .touchUpInside)
    self.navigationItem.titleView = button
}

Answer 1

创建 UIImageView，将其添加为 titleView 并将 UITapGestureRecognizer 添加到您的 UIImageView

let imageView = UIImageView()
imageView.image = UIImage.named("yourImage")
// do any settings to your imageView
let titleTap = UITapGestureRecognizer(target: self, action: #selector(titlePressed))
self.navigationItem.titleView = imageView
self.navigationItem.titleView?.isUserInteractionEnabled = true
self.navigationItem.titleView?.addGestureRecognizer(titleTap)

Answer 2

我的工作代码。

let button =  UIButton(type: .custom)
button.setImage(UIImage (named: "your_image"), for: .normal)
button.frame = CGRect(x: 0, y: 0, width: 100, height: 40)
button.backgroundColor = UIColor.clear
button.setTitle("Button", for: .normal)
button.addTarget(self, action: #selector(self.clickOnButton), for: .touchUpInside)
self.navigationItem.titleView = button

这里可以看到最后一行的button直接设置为navigationItem的titleView，这样就会在导航栏中间添加button

按钮的操作方法如下：

@objc func clickOnButton(button: UIButton) {
    print("Title Tapped")
}

Swift 中的可点击图像作为导航栏标题

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