Question

现在在iOS 11中，sizeThatFits方法未从UINavigationBar子类调用。更改UINavigationBar的帧会导致故障和错误的插入。那么，现在有关如何自定义导航栏高度的任何想法吗？

Answer 1

根据Apple开发人员的说法（查看here，here和here），不支持更改iOS 11中的导航栏高度。 Here他们建议做一些变通办法，例如在导航栏下面（但在其外面），然后删除导航栏边框。因此，您将在故事板中使用此功能：

在设备上看起来像这样：

现在，您可以执行其他答案中建议的变通方法：创建UINavigationBar的自定义子类，向其添加自定义大型子视图，覆盖sizeThatFits和layoutSubviews，然后为导航的顶级控制器设置additionalSafeAreaInsets.top到差异customHeight - 44px，但是条形视图仍然是默认的44px，即使视觉上一切看起来都很完美。我并没有尝试覆盖setFrame，但也许它有效，正如Apple开发人员在上面的一个链接中所写的那样：＆＃34; ...并且[支持]都没有改变框架由UINavigationController拥有的导航栏的导航栏（导航控制器会在它认为合适的情况下愉快地踩踏您的帧更改）。＆＃34;

在我的情况下，上面的解决方法使视图看起来像这样（调试视图以显示边框）：

正如你所看到的，视觉外观相当不错，additionalSafeAreaInsets正确推送内容，大导航栏可见，但是我在这个栏中有一个自定义按钮，只有下面的区域标准的44像素导航栏是可点击的（图像中的绿色区域）。标准导航栏高度以下的触摸不会到达我的自定义子视图，因此我需要调整导航栏本身的大小，Apple开发人员说不支持。

Answer 2

2018年1月7日更新

此代码支持XCode 9.2，iOS 11.2

我遇到了同样的问题。以下是我的解决方案。我认为身高是66.

如果有帮助，请选择我的答案。

创建CINavgationBar.swift

   import UIKit

@IBDesignable
class CINavigationBar: UINavigationBar {

    //set NavigationBar's height
    @IBInspectable var customHeight : CGFloat = 66

    override func sizeThatFits(_ size: CGSize) -> CGSize {

        return CGSize(width: UIScreen.main.bounds.width, height: customHeight)

    }

    override func layoutSubviews() {
        super.layoutSubviews()

        print("It called")

        self.tintColor = .black
        self.backgroundColor = .red



        for subview in self.subviews {
            var stringFromClass = NSStringFromClass(subview.classForCoder)
            if stringFromClass.contains("UIBarBackground") {

                subview.frame = CGRect(x: 0, y: 0, width: self.frame.width, height: customHeight)

                subview.backgroundColor = .green
                subview.sizeToFit()
            }

            stringFromClass = NSStringFromClass(subview.classForCoder)

            //Can't set height of the UINavigationBarContentView
            if stringFromClass.contains("UINavigationBarContentView") {

                //Set Center Y
                let centerY = (customHeight - subview.frame.height) / 2.0
                subview.frame = CGRect(x: 0, y: centerY, width: self.frame.width, height: subview.frame.height)
                subview.backgroundColor = .yellow
                subview.sizeToFit()

            }
        }


    }


}

设置故事板

设置自定义NavigationBar类

添加TestView +设置SafeArea

ViewController.swift

import UIKit

class ViewController: UIViewController {

    var navbar : UINavigationBar!

    @IBOutlet weak var testView: UIView!

    override func viewDidLoad() {
        super.viewDidLoad()

        //update NavigationBar's frame
        self.navigationController?.navigationBar.sizeToFit()
        print("NavigationBar Frame : \(String(describing: self.navigationController!.navigationBar.frame))")

    }

    //Hide Statusbar
    override var prefersStatusBarHidden: Bool {

        return true
    }

    override func viewDidAppear(_ animated: Bool) {

        super.viewDidAppear(false)

        //Important!
        if #available(iOS 11.0, *) {

            //Default NavigationBar Height is 44. Custom NavigationBar Height is 66. So We should set additionalSafeAreaInsets to 66-44 = 22
            self.additionalSafeAreaInsets.top = 22

        }

    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}

SecondViewController.swift

import UIKit

class SecondViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.


        // Create BackButton
        var backButton: UIBarButtonItem!
        let backImage = imageFromText("Back", font: UIFont.systemFont(ofSize: 16), maxWidth: 1000, color:UIColor.white)
        backButton = UIBarButtonItem(image: backImage, style: UIBarButtonItemStyle.plain, target: self, action: #selector(SecondViewController.back(_:)))

        self.navigationItem.leftBarButtonItem = backButton
        self.navigationItem.leftBarButtonItem?.setBackgroundVerticalPositionAdjustment(-10, for: UIBarMetrics.default)


    }
    override var prefersStatusBarHidden: Bool {

        return true
    }
    @objc func back(_ sender: UITabBarItem){

        self.navigationController?.popViewController(animated: true)

    }


    //Helper Function : Get String CGSize
    func sizeOfAttributeString(_ str: NSAttributedString, maxWidth: CGFloat) -> CGSize {
        let size = str.boundingRect(with: CGSize(width: maxWidth, height: 1000), options:(NSStringDrawingOptions.usesLineFragmentOrigin), context:nil).size
        return size
    }


    //Helper Function : Convert String to UIImage
    func imageFromText(_ text:NSString, font:UIFont, maxWidth:CGFloat, color:UIColor) -> UIImage
    {
        let paragraph = NSMutableParagraphStyle()
        paragraph.lineBreakMode = NSLineBreakMode.byWordWrapping
        paragraph.alignment = .center // potentially this can be an input param too, but i guess in most use cases we want center align

        let attributedString = NSAttributedString(string: text as String, attributes: [NSAttributedStringKey.font: font, NSAttributedStringKey.foregroundColor: color, NSAttributedStringKey.paragraphStyle:paragraph])

        let size = sizeOfAttributeString(attributedString, maxWidth: maxWidth)
        UIGraphicsBeginImageContextWithOptions(size, false , 0.0)
        attributedString.draw(in: CGRect(x: 0, y: 0, width: size.width, height: size.height))
        let image = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        return image!
    }




    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }



}

黄色是barbackgroundView。黑色不透明度是BarContentView。

我删除了BarContentView的backgroundColor。

那是它。

Answer 3

添加了：问题在iOS 11 beta 6中得到解决，因此下面的代码没有用^ _ ^

原始答案：

解决以下代码：

（我总是希望navigationBar.height + statusBar.height == 64 statusBar的隐藏是否为真）

 @implementation P1AlwaysBigNavigationBar

- (CGSize)sizeThatFits:(CGSize)size {
    CGSize sizeThatFit = [super sizeThatFits:size];
    if ([UIApplication sharedApplication].isStatusBarHidden) {
        if (sizeThatFit.height < 64.f) {
            sizeThatFit.height = 64.f;
        }
    }
    return sizeThatFit;
}

- (void)setFrame:(CGRect)frame {
    if ([UIApplication sharedApplication].isStatusBarHidden) {
        frame.size.height = 64;
    }
    [super setFrame:frame];
}

- (void)layoutSubviews
{
    [super layoutSubviews];

    if (![UIApplication sharedApplication].isStatusBarHidden) {
        return;
    }

    for (UIView *subview in self.subviews) {
        NSString* subViewClassName = NSStringFromClass([subview class]);
        if ([subViewClassName containsString:@"UIBarBackground"]) {
            subview.frame = self.bounds;
        }else if ([subViewClassName containsString:@"UINavigationBarContentView"]) {
            if (subview.height < 64) {
                subview.y = 64 - subview.height;
            }else {
                subview.y = 0;
            }
        }
    }
}
@end

Answer 4

这对我有用：

- (CGSize)sizeThatFits:(CGSize)size {
    CGSize sizeThatFit = [super sizeThatFits:size];
    if ([UIApplication sharedApplication].isStatusBarHidden) {
        if (sizeThatFit.height < 64.f) {
            sizeThatFit.height = 64.f;
        }
    }
    return sizeThatFit;
}

- (void)setFrame:(CGRect)frame {
    if ([UIApplication sharedApplication].isStatusBarHidden) {
        frame.size.height = 64;
    }
    [super setFrame:frame];
}

- (void)layoutSubviews
{
    [super layoutSubviews];

    for (UIView *subview in self.subviews) {
        if ([NSStringFromClass([subview class]) containsString:@"BarBackground"]) {
            CGRect subViewFrame = subview.frame;
            subViewFrame.origin.y = 0;
            subViewFrame.size.height = 64;
            [subview setFrame: subViewFrame];
        }
        if ([NSStringFromClass([subview class]) containsString:@"BarContentView"]) {
            CGRect subViewFrame = subview.frame;
            subViewFrame.origin.y = 20;
            subViewFrame.size.height = 44;
            [subview setFrame: subViewFrame];
        }
    }
}

Answer 5

使用Swift 4简化。

class CustomNavigationBar : UINavigationBar {

    private let hiddenStatusBar: Bool

    // MARK: Init
    init(hiddenStatusBar: Bool = false) {
        self.hiddenStatusBar = hiddenStatusBar
        super.init(frame: .zero)
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    // MARK: Overrides
    override func layoutSubviews() {
        super.layoutSubviews()

        if #available(iOS 11.0, *) {
            for subview in self.subviews {
                let stringFromClass = NSStringFromClass(subview.classForCoder)
                if stringFromClass.contains("BarBackground") {
                    subview.frame = self.bounds
                } else if stringFromClass.contains("BarContentView") {
                    let statusBarHeight = self.hiddenStatusBar ? 0 : UIApplication.shared.statusBarFrame.height
                    subview.frame.origin.y = statusBarHeight
                    subview.frame.size.height = self.bounds.height - statusBarHeight
                }
            }
        }
    }
}

Answer 6

虽然它在beta 4中已修复，但导航栏的背景图像似乎无法与实际视图一起缩放（您可以通过在视图层次结构查看器中查看来验证这一点）。目前的解决方法是覆盖自定义layoutSubviews中的UINavigationBar，然后使用此代码：

- (void)layoutSubviews
{
  [super layoutSubviews];

  for (UIView *subview in self.subviews) {
    if ([NSStringFromClass([subview class]) containsString:@"BarBackground"]) {
        CGRect subViewFrame = subview.frame;
        subViewFrame.origin.y = -20;
        subViewFrame.size.height = CUSTOM_FIXED_HEIGHT+20;
        [subview setFrame: subViewFrame];
    }
  }
}

如果您注意到，条形背景实际上具有-20的偏移量，使其显示在状态栏后面，因此上面的计算会将其添加到其中。

Answer 7

除了覆盖-layoutSubviews和-setFrame:之外，如果您不希望调整大小的导航栏隐藏您的内容，则应该检查新添加的UIViewController的additionalSafereaInsets属性（Apple Documentation）

Answer 8

在Xcode 9 Beta 6上我仍有问题。条形图总是看起来像素高44像素，它被推到状态栏下。

为了解决这个问题，我用@strangetimes代码创建了一个子类（在Swift中）

class NavigationBar: UINavigationBar {

  override func layoutSubviews() {
    super.layoutSubviews()

    for subview in self.subviews {
      var stringFromClass = NSStringFromClass(subview.classForCoder)
      print("--------- \(stringFromClass)")
      if stringFromClass.contains("BarBackground") {
        subview.frame.origin.y = -20
        subview.frame.size.height = 64
      }
    }
  }
}

我将栏放在低于状态栏的位置

let newNavigationBar = NavigationBar(frame: CGRect(origin: CGPoint(x: 0,
                                                                       y: 20),
                                                         size: CGSize(width: view.frame.width,
                                                                      height: 64)
      )
    )

Answer 9

这就是我使用的。如果您使用UISearchBar作为标题或其他修改条形内容大小的视图，它适用于常规内容（44.0像素），您必须相应地更新值。使用它需要您自担风险，因为它可能会在某些时候制动。

这是高度为90.0px的导航栏，适用于iOS 11及更早版本。对于iOS 11之前的版本，您可能需要为UIBarButtonItem添加一些插图才能看起来相同。

class NavBar: UINavigationBar {

    override init(frame: CGRect) {
        super.init(frame: frame)

        if #available(iOS 11, *) {
            translatesAutoresizingMaskIntoConstraints = false
        }
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    override func sizeThatFits(_ size: CGSize) -> CGSize {
        return CGSize(width: UIScreen.main.bounds.width, height: 70.0)
    }

    override func layoutSubviews() {
        super.layoutSubviews()

        guard #available(iOS 11, *) else {
            return
        }

        frame = CGRect(x: frame.origin.x, y:  0, width: frame.size.width, height: 90)

        if let parent = superview {
            parent.layoutIfNeeded()

            for view in parent.subviews {
                let stringFromClass = NSStringFromClass(view.classForCoder)
                if stringFromClass.contains("NavigationTransition") {
                    view.frame = CGRect(x: view.frame.origin.x, y: frame.size.height - 64, width: view.frame.size.width, height: parent.bounds.size.height - frame.size.height + 4)
                }
            }
        }

        for subview in self.subviews {
            var stringFromClass = NSStringFromClass(subview.classForCoder)
            if stringFromClass.contains("BarBackground") {
                subview.frame = CGRect(x: 0, y: 0, width: self.frame.width, height: 90)
                subview.backgroundColor = .yellow
            }

            stringFromClass = NSStringFromClass(subview.classForCoder)
            if stringFromClass.contains("BarContent") {
                subview.frame = CGRect(x: subview.frame.origin.x, y: 40, width: subview.frame.width, height: subview.frame.height)

            }
        }
    }
}

然后将它添加到UINavigationController子类中，如下所示：

class CustomBarNavigationViewController: UINavigationController {

    init() {
        super.init(navigationBarClass: NavBar.self, toolbarClass: nil)
    }

    override init(nibName nibNameOrNil: String?, bundle nibBundleOrNil: Bundle?) {
        super.init(nibName: nibNameOrNil, bundle: nibBundleOrNil)
    }

    override init(rootViewController: UIViewController) {
        super.init(navigationBarClass: NavBar.self, toolbarClass: nil)

        self.viewControllers = [rootViewController]
    }

    required public init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

}

Answer 10

我将导航栏的高度加倍，因此我可以在默认导航控件上方添加一行状态图标，方法是继承UINavigationBar并使用sizeThatFits覆盖高度。幸运的是，这具有相同的效果，并且更简单，副作用更少。我用iOS 8到11测试了它。把它放在你的视图控制器中：

- (void)viewDidLoad {
    [super viewDidLoad];
    if (self.navigationController) {
        self.navigationItem.prompt = @" "; // this adds empty space on top
    }
}

Answer 11

这对于常规导航栏效果很好。如果您使用LargeTitle，这将无法正常工作，因为titleView的大小不会是固定的44点高度。但是对于常规视图来说，就足够了。

就像@frangulyan苹果一样，建议在navBar下面添加一个视图并隐藏细线（阴影图像）。这是我在下面提出的。我将一个uiview添加到navigationItem的titleView中，然后在该uiview中添加了一个imageView。我删除了细线（阴影图像）。我添加的uiview是same exact color as the navBar。我在该视图中添加了uiLabel，仅此而已。

这是3d图像。扩展视图位于navBar下方的usernameLabel后面。它是灰色的，下面有一条细线。只需锚定您的collectionView或细细的分隔线下面的任何东西即可。

每行代码上方都说明了9个步骤：

class ExtendedNavController: UIViewController {

    fileprivate let extendedView: UIView = {
        let view = UIView()
        view.translatesAutoresizingMaskIntoConstraints = false
        view.backgroundColor = .white
        return view
    }()

    fileprivate let separatorLine: UIView = {
        let view = UIView()
        view.translatesAutoresizingMaskIntoConstraints = false
        view.backgroundColor = .gray
        return view
    }()

    fileprivate let usernameLabel: UILabel = {
        let label = UILabel()
        label.translatesAutoresizingMaskIntoConstraints = false
        label.font = UIFont.systemFont(ofSize: 14)
        label.text = "username goes here"
        label.textAlignment = .center
        label.lineBreakMode = .byTruncatingTail
        label.numberOfLines = 1
        return label
    }()

    fileprivate let myTitleView: UIView = {
        let view = UIView()
        view.backgroundColor = .white
        return view
    }()

    fileprivate let profileImageView: UIImageView = {
        let imageView = UIImageView()
        imageView.translatesAutoresizingMaskIntoConstraints = false
        imageView.clipsToBounds = true
        imageView.backgroundColor = .darkGray
        return imageView
    }()

    override func viewDidLoad() {
        super.viewDidLoad()
        view.backgroundColor = .white

        // 1. the navBar's titleView has a height of 44, set myTitleView height and width both to 44
        myTitleView.frame = CGRect(x: 0, y: 0, width: 44, height: 44)

        // 2. set myTitleView to the nav bar's titleView
        navigationItem.titleView = myTitleView

        // 3. get rid of the thin line (shadow Image) underneath the navigationBar
        navigationController?.navigationBar.setValue(true, forKey: "hidesShadow")
        navigationController?.navigationBar.layoutIfNeeded()

        // 4. set the navigationBar's tint color to the color you want
        navigationController?.navigationBar.barTintColor = UIColor(red: 249.0/255.0, green: 249.0/255.0, blue: 249.0/255.0, alpha: 1.0)

        // 5. set extendedView's background color to the same exact color as the navBar's background color
        extendedView.backgroundColor = UIColor(red: 249.0/255.0, green: 249.0/255.0, blue: 249.0/255.0, alpha: 1.0)

        // 6. set your imageView to get pinned inside the titleView
        setProfileImageViewAnchorsInsideMyTitleView()

        // 7. set the extendedView's anchors directly underneath the navigation bar
        setExtendedViewAndSeparatorLineAnchors()

        // 8. set the usernameLabel's anchors inside the extendedView
        setNameLabelAnchorsInsideTheExtendedView()
    }

    override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(true)

        // 9. **Optional** If you want the shadow image to show on other view controllers when popping or pushing
        navigationController?.navigationBar.setBackgroundImage(nil, for: .default)
        navigationController?.navigationBar.setValue(false, forKey: "hidesShadow")
        navigationController?.navigationBar.layoutIfNeeded()
    }

    func setExtendedViewAndSeparatorLineAnchors() {

        view.addSubview(extendedView)
        view.addSubview(separatorLine)

        extendedView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor).isActive = true
        extendedView.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive = true
        extendedView.trailingAnchor.constraint(equalTo: view.trailingAnchor).isActive = true
        extendedView.heightAnchor.constraint(equalToConstant: 29.5).isActive = true

        separatorLine.topAnchor.constraint(equalTo:  extendedView.bottomAnchor).isActive = true
        separatorLine.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive = true
        separatorLine.trailingAnchor.constraint(equalTo: view.trailingAnchor).isActive = true
        separatorLine.heightAnchor.constraint(equalToConstant: 0.5).isActive = true
    }

    func setProfileImageViewAnchorsInsideMyTitleView() {

        myTitleView.addSubview(profileImageView)

        profileImageView.topAnchor.constraint(equalTo: myTitleView.topAnchor).isActive = true
        profileImageView.centerXAnchor.constraint(equalTo: myTitleView.centerXAnchor).isActive = true
        profileImageView.widthAnchor.constraint(equalToConstant: 44).isActive = true
        profileImageView.heightAnchor.constraint(equalToConstant: 44).isActive = true

        // round the profileImageView
        profileImageView.layoutIfNeeded()
        profileImageView.layer.cornerRadius = profileImageView.frame.width / 2
    }

    func setNameLabelAnchorsInsideTheExtendedView() {

        extendedView.addSubview(usernameLabel)

        usernameLabel.topAnchor.constraint(equalTo: extendedView.topAnchor).isActive = true
        usernameLabel.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive = true
        usernameLabel.trailingAnchor.constraint(equalTo: view.trailingAnchor).isActive = true
    }
}

iOS 11导航栏高度自定义

11 个答案: