我正在尝试使用广播扩展程序从我的应用中进行流式传输。问题是RPBroadcastActivityViewController似乎不起作用。当我显示它时，我会弹出一个对话框，询问“ AppName是否想流传输到BroadcastExtensionSetupUI”，而不是我期望的选择器视图。之后，如果我查看viewDebugger，我看到RPBroadcastActivityViewController在顶部但100％透明，则delegate的{{1}}从未被调用，并且应用程序似乎冻结了。请注意，如果我从控制中心的apples ui开始，则可以流式播放。
UIActivityViewController这是通过一个帮助类传递的，该帮助类传递了应该显示 var accessToken : String
@objc public init(accessToken : String) {
self.accessToken = accessToken
super.init()
RPScreenRecorder.shared().delegate = self
NotificationCenter.default.addObserver(forName: UIScreen.capturedDidChangeNotification, object: UIScreen.main, queue: OperationQueue.main) { (notification) in
if self.broadcastPickerView != nil && self.screenTrack == nil {
//let isCaptured = UIScreen.main.isCaptured
}
}
}
deinit {
NotificationCenter.default.removeObserver(self)
}
@available(iOS 12.0, *)
func setupPickerView(view : UIView) {
// Swap the button for an RPSystemBroadcastPickerView.
#if !targetEnvironment(simulator)
let pickerView = RPSystemBroadcastPickerView(frame: CGRect(x: 0,
y: 0,
width: view.bounds.width,
height: 80))
pickerView.translatesAutoresizingMaskIntoConstraints = false
pickerView.preferredExtension = TLScreenSharingHelper.kBroadcastExtensionBundleId
// Theme the picker view to match the white that we want.
if let button = pickerView.subviews.first as? UIButton {
button.imageView?.tintColor = UIColor.white
}
view.addSubview(pickerView)
self.broadcastPickerView = pickerView
let centerX = NSLayoutConstraint(item:pickerView,
attribute: NSLayoutConstraint.Attribute.centerX,
relatedBy: NSLayoutConstraint.Relation.equal,
toItem: view,
attribute: NSLayoutConstraint.Attribute.centerX,
multiplier: 1,
constant: 0);
view.addConstraint(centerX)
let centerY = NSLayoutConstraint(item: pickerView,
attribute: NSLayoutConstraint.Attribute.centerY,
relatedBy: NSLayoutConstraint.Relation.equal,
toItem: view,
attribute: NSLayoutConstraint.Attribute.centerY,
multiplier: 1,
constant: -10);
view.addConstraint(centerY)
let width = NSLayoutConstraint(item: pickerView,
attribute: NSLayoutConstraint.Attribute.width,
relatedBy: NSLayoutConstraint.Relation.equal,
toItem: view,
attribute: NSLayoutConstraint.Attribute.width,
multiplier: 0.75,
constant: 0);
view.addConstraint(width)
let height = NSLayoutConstraint(item: pickerView,
attribute: NSLayoutConstraint.Attribute.height,
relatedBy: NSLayoutConstraint.Relation.equal,
toItem: view,
attribute: NSLayoutConstraint.Attribute.height,
multiplier: 0.75,
constant: 0);
view.addConstraint(height)
#endif
}
//MARK: Start screen share entry point
@objc public func startScreenBroadcast(fromViewController vc: UIViewController) {
// Use RPSystemBroadcastPickerView when available (iOS 12+ devices).
if #available(iOS 12.0, *) {
self.setupPickerView(view:vc.view)
}
//set token for the extension to use
let sharedUserDefaults = UserDefaults(suiteName: kSharedUserDefaultsKey)
sharedUserDefaults?.set(accessToken, forKey: kSharedUserDefaultsAccessTokenKey)
sharedUserDefaults?.synchronize()
if let controller = self.broadcastController {
controller.finishBroadcast { [unowned self] error in
DispatchQueue.main.async {
self.broadcastController = nil
}
}
} else {
// This extension should be the broadcast upload extension UI, not broadcast update extension
RPBroadcastActivityViewController.load(withPreferredExtension:TLScreenSharingHelper.kBroadcastExtensionSetupUiBundleId) {
(broadcastActivityViewController, error) in
if let broadcastActivityViewController = broadcastActivityViewController {
broadcastActivityViewController.delegate = self
broadcastActivityViewController.modalPresentationStyle = .popover
vc.present(broadcastActivityViewController, animated: true)
}
}
}
}
//MARK: RPBroadcastActivityViewControllerDelegate
public func broadcastActivityViewController(_ broadcastActivityViewController: RPBroadcastActivityViewController, didFinishWith broadcastController: RPBroadcastController?, error: Error?) {
DispatchQueue.main.async {
self.broadcastController = broadcastController
self.broadcastController?.delegate = self
broadcastActivityViewController.dismiss(animated: true) {
self.startBroadcast()
}
}
}
func startBroadcast() {
self.broadcastController?.startBroadcast { error in
DispatchQueue.main.async {
if let theError = error {
print("Broadcast controller failed to start with error:", theError as Any)
} else {
print("Broadcast controller started.")
}
}
}
}
的{{1}}。
为什么这个UIViewController是透明的？