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我有两个视图，其中一个是mainVideoView（灰色），另一个是subVideoView（红色）。它们都是UIApplication.shared.keyWindow的子视图。当一个窗口的子视图被删除时，视图大小会自动设置为窗口大小
当我尝试，并尽量减少他们（使用func minimiseOrMaximiseViews，它们会最小化（如下面的图所示）。
之后，我想从窗口中删除subVideoView。我尝试删除的那一刻subVideoView（使用func removeSubVideoViewFromVideoView()调用func minimiseOrMaximiseViews），mainVideoView放大到全屏尺寸，我不确定为什么会发生这种情况，我希望它保持在相同的尺寸下。可以做到这一点吗？
这是我如何设置的意见
func configureVideoView(){
videoView.backgroundColor = UIColor.darkGray
videoView.tag = 0 // To identify view during animation
// ADDING TAP GESTURE TO MAXIMISE THE VIEW WHEN ITS SMALL
let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(handleTap(gestureRecognizer:)))
videoView.addGestureRecognizer(tapGestureRecognizer)
// ADDING PAN GESTURE RECOGNISER TO MAKE VIDEOVIEW MOVABLE INSIDE PARENT VIEW
videoView.addGestureRecognizer(UIPanGestureRecognizer(target: self, action: #selector(self.dragView)))
guard let window = UIApplication.shared.keyWindow else{
return
}
window.addSubview(videoView)
videoView.translatesAutoresizingMaskIntoConstraints = false
let viewsDict = ["videoView" : videoView] as [String : Any]
// SETTING CONSTRAINTS
window.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "H:|[videoView]|", options: [], metrics: nil, views: viewsDict))
window.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "V:|[videoView]|", options: [], metrics: nil, views: viewsDict))
window.layoutIfNeeded() // Lays out subviews immediately
window.bringSubview(toFront: videoView) // To bring subView to front
print("Videoview constraints in configureVideoView \(videoView.constraints)")
}
func configureSubVideoView(){
subVideoView.backgroundColor = UIColor.red
subVideoView.tag = 1 // To identify view during animation
subVideoView.isHidden = true
// Adding Pan Gesture recogniser to make subVideoView movable inside parentview
subVideoView.addGestureRecognizer(UIPanGestureRecognizer(target: self, action: #selector(self.dragView)))
// Constraining subVideoView to window to ensure that minimising and maximising animation works properly
constrainSubVideoViewToWindow()
}
func constrainSubVideoViewToWindow(){
//self.subVideoView.setNeedsLayout()
guard let window = UIApplication.shared.keyWindow else{
print("Window does not exist")
return
}
guard !window.subviews.contains(subVideoView)else{ // Does not allow to go through the below code if the window already contains subVideoView
return
}
if self.videoView.subviews.contains(subVideoView){ // If videoView contains subVideoView remove subVideoView
subVideoView.removeFromSuperview()
}
window.addSubview(subVideoView)
// Default constraints to ensure that the subVideoView is initialised with maxSubVideoViewWidth & maxSubVideoViewHeight and is positioned above buttons
let bottomOffset = buttonDiameter + buttonStackViewBottomPadding + padding
subVideoView.translatesAutoresizingMaskIntoConstraints = false
let widthConstraint = NSLayoutConstraint(item: subVideoView, attribute: .width, relatedBy: .equal, toItem: nil, attribute: NSLayoutAttribute.notAnAttribute, multiplier: 1.0, constant: maxSubVideoViewWidth)
let heightConstraint = NSLayoutConstraint(item: subVideoView, attribute: .height, relatedBy: .equal, toItem: nil, attribute: NSLayoutAttribute.notAnAttribute, multiplier: 1.0, constant: maxSubVideoViewHeight)
let rightConstraint = NSLayoutConstraint(item: subVideoView, attribute: .trailing, relatedBy: .equal, toItem: window, attribute: .trailing, multiplier: 1.0, constant: -padding)
let bottomConstraint = NSLayoutConstraint(item: subVideoView, attribute: .bottom, relatedBy: .equal, toItem: window, attribute: .bottom, multiplier: 1.0, constant: -bottomOffset)
var constraintsArray = [NSLayoutConstraint]()
constraintsArray.append(widthConstraint)
constraintsArray.append(heightConstraint)
constraintsArray.append(rightConstraint)
constraintsArray.append(bottomConstraint)
window.addConstraints(constraintsArray)
window.layoutIfNeeded() // Lays out subviews immediately
subVideoView.setViewCornerRadius()
window.bringSubview(toFront: subVideoView) // To bring subView to front
}
这是我如何动画的意见和消除subVideoView
func minimiseOrMaximiseViews(animationType: String){
let window = UIApplication.shared.keyWindow
let buttonStackViewHeight = buttonsStackView.frame.height
if animationType == "maximiseView" {
constrainSubVideoViewToWindow()
}
UIView.animate(withDuration: 0.3, delay: 0, options: [],
animations: { [unowned self] in // "[unowned self] in" added to avoid strong reference cycles,
switch animationType {
case "minimiseView" :
self.hideControls()
// Minimising self i.e videoView
self.videoView.frame = CGRect(x: self.mainScreenWidth - self.videoViewWidth - self.padding,
y: self.mainScreenHeight - self.videoViewHeight - self.padding,
width: self.videoViewWidth,
height: self.videoViewHeight)
// Minimising subVideoView
self.subVideoView.frame = CGRect(x: self.mainScreenWidth - self.minSubVideoViewWidth - self.padding * 2,
y: self.mainScreenHeight - self.minSubVideoViewHeight - self.padding * 2,
width: self.minSubVideoViewWidth,
height: self.minSubVideoViewHeight)
window?.layoutIfNeeded()
self.videoView.setViewCornerRadius()
self.subVideoView.setViewCornerRadius()
print("self.subVideoView.frame AFTER setting: \(self.subVideoView.frame)")
default:
break
}
}) { [unowned self] (finished: Bool) in // This will be called when the animation completes, and its finished value will be true
if animationType == "minimiseView" {
// **** Removing subVideoView from videoView ****
self.removeSubVideoViewFromVideoView()
}
}
}
func removeSubVideoViewFromVideoView(){
//self.subVideoView.setNeedsLayout()
guard let window = UIApplication.shared.keyWindow else{
return
}
guard !self.videoView.subviews.contains(subVideoView)else{ // Does not allow to go through the below code if the videoView already contains subVideoView
return
}
if window.subviews.contains(subVideoView) { // removing subVideoView from window
subVideoView.removeFromSuperview() // *** CAUSE OF ISSUE ***
}
guard !window.subviews.contains(subVideoView) else{
return
}
videoView.addSubview(subVideoView)
}