在我的iOS应用中，我使用AVCaptureSession和叠加来录制视频。但是，没有任何内容保存到我的相册中。我在这做错了什么？当我运行NSLog时，控制台显示预期的路径，但是一旦视图加载，它就会运行didFinishRecording代码，而不是在记录结束时。
//
// LiveCam.m
// P3 Media
//
// Created by Candace Brassfield on 7/29/16.
// Copyright © 2016 316 Apps. All rights reserved.
//
#import "LiveCam.h"
@interface LiveCam ()
@end
@implementation LiveCam
@synthesize session;
-(void)viewWillAppear:(BOOL)animated {
NSNumber *value = [NSNumber numberWithInt:UIInterfaceOrientationLandscapeLeft];
[[UIDevice currentDevice] setValue:value forKey:@"orientation"];
NSDate *today = [NSDate date];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"MMM d hh:mm:ss a"];
// display in 12HR/24HR (i.e. 11:25PM or 23:25) format according to User Settings
NSString *currentTime = [dateFormatter stringFromDate:today];
NSError* error4 = nil;
AVAudioSession* audioSession = [AVAudioSession sharedInstance];
[audioSession setCategory:AVAudioSessionCategoryAmbient error:&error4];
OSStatus propertySetError = 0;
UInt32 allowMixing = true;
propertySetError |= AudioSessionSetProperty(kAudioSessionProperty_OtherMixableAudioShouldDuck, sizeof(allowMixing), &allowMixing);
// Activate the audio session
error4 = nil;
if (![audioSession setActive:YES error:&error4]) {
NSLog(@"AVAudioSession setActive:YES failed: %@", [error4 localizedDescription]);
}
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectoryPath = [paths objectAtIndex:0];
self.session = [[AVCaptureSession alloc] init];
[self.session beginConfiguration];
self.session.sessionPreset = AVCaptureSessionPreset1280x720;
self.navigationController.navigationBarHidden = YES;
NSError *error = nil;
AVCaptureDevice *audioCaptureDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeAudio];
NSError *error2 = nil;
AVCaptureDeviceInput *audioInput = [AVCaptureDeviceInput deviceInputWithDevice:audioCaptureDevice error:&error2];
AVCaptureDevice *device;
AVCaptureDevicePosition desiredPosition = AVCaptureDevicePositionBack;
// find the front facing camera
device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
// get the input device
AVCaptureDeviceInput *deviceInput = [AVCaptureDeviceInput deviceInputWithDevice:device error:&error];
AVCaptureMovieFileOutput *movieFileOutput = [[AVCaptureMovieFileOutput alloc] init];
NSString *archives = [documentsDirectoryPath stringByAppendingPathComponent:@"archives"];
NSString *editedfilename = [[@"ComeOnDown" lastPathComponent] stringByDeletingPathExtension];
NSString *datestring = [[editedfilename stringByAppendingString:@" "] stringByAppendingString:currentTime];
NSLog(@"%@", datestring);
NSString *outputpathofmovie = [[archives stringByAppendingPathComponent:datestring] stringByAppendingString:@".mp4"];
NSURL *outputURL = [[NSURL alloc] initFileURLWithPath:outputpathofmovie];
[self.session addInput:audioInput];
[self.session addInput:deviceInput];
[self.session addOutput:movieFileOutput];
[self.session commitConfiguration];
[self.session startRunning];
AVCaptureVideoPreviewLayer *previewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:self.session];
previewLayer.backgroundColor = [[UIColor blackColor] CGColor];
previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
previewLayer.connection.videoOrientation = AVCaptureVideoOrientationLandscapeRight;
CALayer *overlayLayer = [CALayer layer];
CALayer *overlayLayer2 = [CALayer layer];
UIImage *overlayImage = [UIImage imageNamed:@"LiveBorder.png"];
[overlayLayer setContents:(id)[overlayImage CGImage]];
overlayLayer.frame = CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height);
[overlayLayer setMasksToBounds:YES];
CALayer *rootLayer = [self.view layer];
[rootLayer setMasksToBounds:YES];
[previewLayer setFrame:[rootLayer bounds]];
[rootLayer addSublayer:previewLayer];
[rootLayer addSublayer:overlayLayer];
[rootLayer addSublayer:label2.layer];
movieFileOutput.movieFragmentInterval = kCMTimeInvalid;
[movieFileOutput startRecordingToOutputFileURL:outputURL recordingDelegate:self];
//self.session = nil;
if (error) {
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:
[NSString stringWithFormat:@"Failed with error %d", (int)[error code]]
message:[error localizedDescription]
delegate:nil
cancelButtonTitle:@"Dismiss"
otherButtonTitles:nil];
[alertView show];
}
[super viewWillAppear:YES];
}
-(void)viewWillDisappear:(BOOL)animated {
self.navigationController.navigationBarHidden = NO;
}
-(void)captureOutput:(AVCaptureFileOutput *)captureOutput didStartRecordingToOutputFileAtURL:(NSURL *)fileURL fromConnections:(NSArray *)connections {
}
-(void)video:(NSString *)videoPath didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo{
NSLog(@"Finished with error: %@", error);
}
- (void)captureOutput:(AVCaptureFileOutput *)captureOutput didFinishRecordingToOutputFileAtURL:(NSURL *)outputFileURL fromConnections:(NSArray *)connections error:(NSError *)error {
//finished
NSString *proud = [[NSString alloc] initWithString:[outputFileURL path]];
NSLog(@"Finished%@", proud);
UISaveVideoAtPathToSavedPhotosAlbum(proud, self, @selector(video:didFinishSavingWithError: contextInfo:), (__bridge void *)(proud));
}
-(IBAction)goBackNow {
[myAVPlayer stop];
[self.session stopRunning];
// [captureView performSelector:@selector(stopRecording) withObject:nil afterDelay:0.0];
NSString *outputPath = [[NSString alloc] initWithFormat:@"%@/%@", [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0], @"output.mp4"];
UISaveVideoAtPathToSavedPhotosAlbum(outputPath, self, @selector(video:didFinishSavingWithError: contextInfo:), (__bridge void *)(outputPath));
[self.navigationController popToRootViewControllerAnimated:YES];
self.navigationController.navigationBarHidden = NO;
//[self.navigationController popToRootViewControllerAnimated:YES];
}
-(void)allDone {
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
答案 0 :(得分：0)
尝试在Path to video之后添加此代码并检查：
UISaveVideoAtPathToSavedPhotosAlbum(url.path, self, @selector(video:didFinishSavingWithError:contextInfo:), nil);
在viewcontroller中添加此方法
- (void)video:(NSString *)videoPath didFinishSavingWithError:(NSError *)error contextInfo: (void *) contextInfo {
if (error == nil) {
[[[UIAlertView alloc] initWithTitle:@"Saved to camera roll" message:@"" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil] show];
} else {
[[[UIAlertView alloc] initWithTitle:@"Failed to save" message:error.localizedDescription delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil] show];
}
}
希望它适合你。！