Question

我正在将自定义UIView子类的nib文件加载到我的viewcontroller中。这里的问题是，当我将方向更改为横向时，视图仍然以纵向框架显示。我希望它的框架也可以在横向模式下设置。

下面是我的代码： -

class CustomPopUpView: UIView {

@IBOutlet weak var vWtitle: UIView!
@IBOutlet weak var lblTitle: UILabel!
@IBOutlet weak var lblContent: UILabel!
@IBOutlet weak var vwAlertSub: UIView!
@IBOutlet weak var btnCenter: UIButton!

var view: UIView!

func xibSetup() {
    view = loadViewFromNib()
    view.frame = bounds
    view.autoresizingMask = [UIViewAutoresizing.flexibleWidth, UIViewAutoresizing.flexibleHeight]
    addSubview(view)
    lblTitle.adjustsFontSizeToFitWidth = true
    view.backgroundColor = UIColor.black.withAlphaComponent(0.6)
    self.showAnimate()
}

func loadViewFromNib() -> UIView {
    let bundle = Bundle(for: type(of: self))
    let nib = UINib(nibName: "CustomPopUpView", bundle: bundle)
    let view = nib.instantiate(withOwner: self, options: nil)[0] as! UIView
    return view
}

override func layoutSubviews(){
    super.layoutSubviews()
    print("LayoutSubViews...............")
   // view.frame = bounds
}

func showAnimate()
{
    self.transform = CGAffineTransform(scaleX: 1.3, y: 1.3)
    self.alpha = 0.0;
    UIView.animate(withDuration: 0.25, animations: {
        self.alpha = 1.0
        self.transform = CGAffineTransform(scaleX: 1.0, y: 1.0)
    });
}

func removeAnimate()
{
    UIView.animate(withDuration: 0.25, animations: {
        self.transform = CGAffineTransform(scaleX: 1.3, y: 1.3)
        self.alpha = 0.0;
    }, completion:{(finished : Bool)  in
        if (finished)
        {
            self.removeFromSuperview()
        }
    });
}


init(frame: CGRect, titleTxt:String, contentText: String, leftButtonText:String, rightButtonText:String) {
    super.init(frame: frame)

    xibSetup()
    lblTitle.text = titleTxt
    lblContent.text = contentText

    if leftButtonText.characters.count > 0 {
        btnLeft.isHidden = false
        btnLeft.setTitle(leftButtonText,for: .normal)
    }
    else {
        btnLeft.isHidden = true
    }
    if rightButtonText.characters.count > 0 {
        btnRight.isHidden = false
        btnRight.setTitle(rightButtonText,for: .normal)
    }
    else {
        btnRight.isHidden = true
    }
}

required init?(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)
}



@IBAction func btnCenterTapped(_ sender: Any) {
    self.removeAnimate()
}

我是否需要在layoutsubviews方法中再次设置框架？或者UIView方向改变还有其他方法吗？（就像我们对viewcontroller的方向方法“viewWillLayoutSubviews”）

一样

Answer 1

此方法将帮助您抓取方向更改。因此，如果您想在横向更新某些内容以及您的笔尖高度或某些内容，请使用此方法更改代码。

override func viewWillTransitionToSize(size: CGSize, withTransitionCoordinator coordinator: UIViewControllerTransitionCoordinator) {
        if UIDevice.currentDevice().orientation.isLandscape.boolValue {
            print("Landscape")
            //Change your code here for landscape
        } else {
            print("Portrait")
            //Change your code here for portrait
        }
    }

Swift 3版本：

override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
        super.viewWillTransition(to: size, with: coordinator)

    }

Answer 2

我认为自从布局出来后，再次设置框架不正确。 in swift override func layoutSubviews() { super.layoutSubviews() self.setNeedsDisplay() } 因为 layoutSubviews（）是一种查看方法。

或者您可以在 viewDidLoad NSNotificationCenter.defaultCenter().addObserver(self, selector: "functionThatYouWantTriggeredOnRotation", name: UIDeviceOrientationDidChangeNotification, object: nil)

中观察

或者，您可以只为viewWillTransition提供覆盖，而不必为UIDeviceOrientationDidChangeNotification添加观察者。

override func viewWillTransitionToSize(size: CGSize,
  withTransitionCoordinator coordinator: UIViewControllerTransitionCoordinator)
{
    if UIDevice.currentDevice().orientation.isLandscape {
            //do your thing
        }
}

Answer 3

Swift 4.2版本：

这是在UIView子类内部处理此问题的一种方法。

首先，您需要在UIView子类中设置观察者。

 override init(frame: CGRect) {
        super.init(frame:frame)
        NotificationCenter.default.addObserver(self, selector: #selector(updateLayout), name: UIDevice.orientationDidChangeNotification, object: nil)
     //UI setup
    }

比起targer功能，您可以为自定义视图设置新框架。

@objc func updateLayout(){
        if UIDevice.current.orientation.isLandscape {
            self.frame = CGRect(.....)
        } else {
            self.frame = CGRect(......)
        }
    }

Dontr忘记在UIView的deinit方法中删除Obsserver。

 deinit {
        NotificationCenter.default.removeObserver(self,
                                                  name: UIDevice.orientationDidChangeNotification,
                                                  object: nil)
}

使用Swift更改子类中方向更改的自定义视图框架

3 个答案: