在导航栏中的后退按钮不能在ios 11中被轻拍

Question

它工作正常，直到最近的更新，我认为导航项目应该与AutoLayout概念一起工作。我一直在使用这样的：

let button = UIButton(frame: CGRect(origin: CGPoint.zero, size: CGSize(width: 30, height: 30))) 
button.setImage(UIImage(named: "BackIcon"), for: UIControlState()) 
button.imageEdgeInsets = UIEdgeInsetsMake(0, -20, 0, 0) 
button.addTarget((target != nil ? target! : self), action: backAction, for: .touchUpInside) 
navigationItem.leftBarButtonItem = UIBarButtonItem(customView: button) 

我应该做的改变，使其顺利的原因目前不被调用上，每一个水龙头，通常它采取2-3次的得到挖掘同一地区。

Answer 1

重写下面的方法在我的自定义UIView类的伎俩为我：

override var intrinsicContentSize: CGSize { 
     return UILayoutFittingExpandedSize 
    } 

Answer 2

这对我在iOS 11上工作。退房，看看它是否适合你。

let btnLeftMenu = UIButton.init(type: .system) 
    let image = UIImage(named: "Back"); 
    btnLeftMenu.setImage(image, for: .normal) 
    btnLeftMenu.setTitle("BACK", for: .normal); 
    btnLeftMenu.imageEdgeInsets = UIEdgeInsetsMake(0, -30, 0, 0) 
    btnLeftMenu.titleEdgeInsets = UIEdgeInsetsMake(0, -30, 0, 0) 
    btnLeftMenu.sizeToFit() 
    btnLeftMenu.tintColor = UIColor.white 
    btnLeftMenu.titleLabel?.font = UIFont.init(name: "Avenir-Heavy", size: 16.0) 
    btnLeftMenu.addTarget(self, action: #selector (CustomMessageVC.backButtonAction(_:)), for: .touchUpInside) 
    let barButton = UIBarButtonItem(customView: btnLeftMenu) 
    self.navigationItem.leftBarButtonItem = barButton 

[编辑]

大概的宽度和图像高度是小的。您可以使用Xcode调试中的实时Viewstack检查后端宽度和高度。点击图片右侧的第二个按钮查看ViewStack。如果宽度和高度是问题，那么增加按钮的宽度和高度，使图像居中，使用imageView属性来适应宽高比。那应该可以解决你的问题。快乐的编码。

Answer 3

工作对我来说：

let backButton = UIBarButtonItem(title: "Back", 
      style: .done, 
      target: self, 
      action: #selector(moveBack)) 
navigationItem.setLeftBarButton(backButton, animated: false) 

打开查看调试和检查框架leftBarButtonItem。您应该注意leftBarButton，因为它不会从UIView继承并在运行时生成帧。

Answer 4

发现这个麻烦潜伏在我们的应用程序，以及现在的iOS 11出来，所以这是我的解决方案。这并不完美，因为您需要为按钮设置框架，但是可以完成这项工作，并且可以在iOS 9.3/10.3.1/11.1（可能介于两者之间）上运行。点击区域正常，用户体验良好。

前：

后：

我称这种现象viewDidLoad：

func setNavbarButtons() { 
    // setup the left and right nav bar buttons 

    // manually define the frame for the buttons 
    let buttonWidth: CGFloat = 44 
    var buttonHeight: CGFloat = buttonWidth 

    // if possible, use the nav bar height as the button height, else fall back to the manual value above 
    if let frame = self.navigationController?.navigationBar.frame { 
     buttonHeight = frame.height 
    } 

    // apply this to the left inset for the left button, right inset for the right button, so the image is pushed to the left/right respectively 
    // (hence the negative value) 
    // setting this to 0 will center the image in the button and we don't want that 
    let edgeInset = -(buttonWidth/2) 

    // setup a button to hold the image (left) 
    let leftButton = UIButton(type: .custom) 
    let backIcon = UIImage(named: "Back with shadow") 
    backIcon!.isAccessibilityElement = true 
    backIcon!.accessibilityLabel = "Back" 

    // no title text 
    leftButton.setTitle("", for: .normal) 
    leftButton.setImage(backIcon, for: .normal) 
    leftButton.sizeToFit() 
    leftButton.addTarget(self, action: #selector(self.didTapLeftNavbarButton), for: .touchUpInside) 

    // define left button frame and inset 
    leftButton.frame.size.width = buttonWidth 
    leftButton.frame.size.height = buttonHeight 
    leftButton.contentEdgeInsets = UIEdgeInsetsMake(0, edgeInset, 0, 0) 

    // finally setup a UIBarButtonItem to hold the UIButton (arg) 
    let leftBarButtonItem = UIBarButtonItem(customView: leftButton) 
    leftBarButtonItem.title = "" 

    // set it 
    self.navigationItem.setLeftBarButton(leftBarButtonItem, animated: true) 

    // rinse/wash/repeat for right button 
    let rightButton = UIButton(type: .custom) 
    let shareIcon = UIImage(named: "Share") 
    shareIcon!.isAccessibilityElement = true 
    shareIcon!.accessibilityLabel = "Share" 

    // no title text 
    rightButton.setTitle("", for: .normal) 
    rightButton.setImage(shareIcon, for: .normal) 
    rightButton.sizeToFit() 
    rightButton.addTarget(self, action: #selector(self.didTapActionButton(_:)), for: .touchUpInside) 

    // define right button frame and inset 
    rightButton.frame.size.width = buttonWidth 
    rightButton.frame.size.height = buttonHeight 
    rightButton.contentEdgeInsets = UIEdgeInsetsMake(0, 0, 0, edgeInset) 

    let rightBarButtonItem = UIBarButtonItem(customView: rightButton) 
    rightBarButtonItem.title = "" 

    self.navigationItem.setRightBarButton(rightBarButtonItem, animated: true) 
}