Question

override func viewDidLayoutSubviews() {
    super.viewDidLayoutSubviews()
    let height = CGFloat(84)
    self.navigationController?.navigationBar.frame = CGRect(x: 0, y: 0, width: self.view.frame.width, height: height)
}

此代码只是在titleView上方插入空格。点（0,0）处的自定义titleView在其上方有大约20个点。高度> 40开始从navBar运行。

Answer 1

您可以使用自定义视图替换导航栏。这更加简单灵活。隐藏导航栏并实现自定义视图。

class ViewController : UIViewController {

    var navBar: UINavigationBar = UINavigationBar()

    override func viewDidLoad() {
        super.viewDidLoad()
        self.setCustomNavBarView()
    }

    func setCustomNavBarView() {
        self.navBar.frame = CGRect(x: 0, y: 0, width: 350, height: 50)  // Set you custom width and Height
        self.navBar.backgroundColor = UIColor.gray
        self.view.addSubview(navBar)

    }
}

关于如何做到这一点的简单tutorial：

希望这会有所帮助!!

Answer 2

您可以继承UINavigationBar：

class CustomNavigationBar: UINavigationBar {
    override func sizeThatFits(_ size: CGSize) -> CGSize {
        let newSize :CGSize = CGSize(width: self.frame.size.width,height: 84)
        return newSize
    }
}

然后创建导航控制器并使用初始化程序来使用自定义导航栏类。

let nav = UINavigationController(navigationBarClass:CustomNavigationBar.self,toolbarClass: nil)

保留UINavigationBar的所有现有行为，并采用您的自定义高度。

OR

就像你已经尝试过的那样：

override func viewDidAppear(_ animated: Bool) {
    super.viewDidAppear(animated)
    let height: CGFloat = 84 //whatever height you want
    let bounds = self.navigationController!.navigationBar.bounds
    self.navigationController?.navigationBar.frame = CGRect(x: 0, y: 0, width: bounds.width, height: bounds.height + height)

}

或者：您可以尝试此解决方案Changing the height of the Navigation bar iOS Swift

Answer 3

        class ViewController: UIViewController {
        var navBar: UINavigationBar = UINavigationBar()
        override func viewDidLoad() {
            super.viewDidLoad()
            // Do any additional setup after loading the view, typically from a nib.    
            self.setCustomNavBarView()
    }
`func setCustomNavBarView() {
            self.navBar.frame = CGRect(x: 0, y: 0, width: 350, height: 100)  // Set you custom width and Height
            self.navBar.backgroundColor = UIColor.gray
            self.view.addSubview(navBar)
        }
    `

swift 3更新了代码

如何以编程方式更改Swift中navigationBar的高度？

3 个答案: