我正在使用
请问有人能解释一下如何解决这个问题吗？我不太确定这是否完全相关，但我收到了错误消息，例如
此外，我已经尝试使用
以下是初始启动录制的按钮。
WKWebView在我的应用中显示全屏YouTube视频，并使用AVCaptureSession在浏览和播放YouTube视频时在后台记录音频和视频。当按下按钮时，捕获会话开始。然而，在录制过程中，当选择并开始播放全屏YouTube视频时，它会立即意外地结束录制，因为调用了处理录制结束的委托方法。请问有人能解释一下如何解决这个问题吗？我不太确定这是否完全相关，但我收到了错误消息，例如
_BSMachError：（os / kern）无效能力（20）_BSMachError：（os / kern）无效名称（15）和无法同时满足约束。，虽然后者似乎是指一个单独的AutoLayout问题。任何帮助都将不胜感激。此外，我已经尝试使用
UIWebView代替WKWebView。当我使用UIWebView时，问题在于当视频正在录制时，YouTube视频甚至无法播放。它只会打开并停留在黑屏的0:00。以下是初始启动录制的按钮。
- (void) buttonClickedStart:(UIButton*)sender //button to start/end recording {
if (!WeAreRecording) {
[self setupVideoCapture];
//----- START RECORDING -----
WeAreRecording = YES;
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryRecord error:nil];
//Create temporary URL to record the video to for later viewing
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *basePath = [paths objectAtIndex:0];
NSString *outputPath = [[NSString alloc] initWithFormat:@"%@", [basePath stringByAppendingPathComponent:@"output.mp4"]];
if ([[NSFileManager defaultManager] isDeletableFileAtPath:outputPath])
[[NSFileManager defaultManager] removeItemAtPath:outputPath error:NULL];
NSURL *outputURL = [[NSURL alloc] initFileURLWithPath:outputPath];
[MovieFileOutput startRecordingToOutputFileURL:outputURL recordingDelegate:self];
self.outputURLs = outputURL;
}
else {
//----- STOP RECORDING -----
WeAreRecording = NO;
[MovieFileOutput stopRecording];
}
}
当按钮被按下时，将调用此方法。它会设置并启动被称为CaptureSession的捕获会话。
- (void)setupVideoCapture {
// Sets up recording capture session
CaptureSession = [[AVCaptureSession alloc] init];
// Add video input to capture session
AVCaptureDevice *VideoDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
if (VideoDevice) {
NSError *error;
VideoInputDevice = [[AVCaptureDeviceInput alloc] initWithDevice:[self CameraWithPosition:AVCaptureDevicePositionFront] error:&error];
if (!error) {
if ([CaptureSession canAddInput:VideoInputDevice])
[CaptureSession addInput:VideoInputDevice];
}
}
// Add audio input to capture session
AVCaptureDevice *audioCaptureDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeAudio];
NSError *error = nil;
AVCaptureDeviceInput *audioInput = [AVCaptureDeviceInput deviceInputWithDevice:audioCaptureDevice error:&error];
if (audioInput) {
[CaptureSession addInput:audioInput];
}
// Add movie file output to the capture session
MovieFileOutput = [[AVCaptureMovieFileOutput alloc] init];
[MovieFileOutput setMovieFragmentInterval:kCMTimeInvalid];
if ([CaptureSession canAddOutput:MovieFileOutput])
[CaptureSession addOutput:MovieFileOutput];
// Set the output properties (you don't really need to see this code)
[self CameraSetOutputProperties]; // (We call a method as it also has to be done after changing camera)
[CaptureSession setSessionPreset:AVCaptureSessionPresetMedium];
//----- START THE CAPTURE SESSION RUNNING -----
[CaptureSession startRunning];
}
这是声明并设置WKWebView的地方。
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
// Add recording button
CGSize screenSize = [[UIScreen mainScreen] bounds].size;
CGRect rect = CGRectMake(0, 0, screenSize.width, 337);
UIButton *start = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[start addTarget:self action:@selector(buttonClickedStart:) forControlEvents:UIControlEventTouchUpInside];
[start setFrame:CGRectMake(30, 338, 35, 35)];
[start setTitle:@"" forState:UIControlStateNormal];
[start setExclusiveTouch:YES];
[start setBackgroundImage:[UIImage imageNamed:@"start.png"] forState:UIControlStateNormal];
[self.view addSubview:start];
// Add web view
webView = [[WKWebView alloc] initWithFrame:rect];
[self.view addSubview:webView];
NSString *webSite = @"http://www.youtube.com";
NSURL *url = [NSURL URLWithString:webSite];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
webView.navigationDelegate = self;
webView.UIDelegate = self;
[webView loadRequest:request]; // Load up Youtube
[self.view addSubview:webView];
}