录制视频

#import <MobileCoreServices/MobileCoreServices.h>

<UIVideoEditorControllerDelegate>//编辑视频

@property (strong, nonatomic) NSString *pathToRecordedVideo;

- (IBAction)editVideo:(id)sender;

- (IBAction)takePicture:(id)sender
{
    // Make sure camera is available
    if ([UIImagePickerController
         isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera] == NO)
    {
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error"
                                                        message:@"Camera Unavailable"
                                                       delegate:self
                                              cancelButtonTitle:@"Cancel"
                                              otherButtonTitles:nil, nil];
        [alert show];
        return;
    }
    if (self.imagePicker == nil)
    {
        self.imagePicker = [[UIImagePickerController alloc] init];
        self.imagePicker.delegate = self;
        self.imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
        self.imagePicker.mediaTypes = [UIImagePickerController
                                  availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];
        self.imagePicker.allowsEditing = YES;
        
    }
    [self presentViewController:self.imagePicker animated:YES completion:NULL];
}

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    NSString * mediaType = [info objectForKey: UIImagePickerControllerMediaType];
    
    if (CFStringCompare((__bridge CFStringRef) mediaType, kUTTypeMovie, 0) == kCFCompareEqualTo)
    {
        NSString * moviePath = [[info objectForKey: UIImagePickerControllerMediaURL] path];

        self.pathToRecordedVideo = moviePath;

        if (UIVideoAtPathIsCompatibleWithSavedPhotosAlbum (moviePath))
        {
            UISaveVideoAtPathToSavedPhotosAlbum (moviePath, nil, nil, nil);
        }
    }
    UIImage * image = (UIImage *)[info objectForKey:UIImagePickerControllerEditedImage];
    UIImageWriteToSavedPhotosAlbum (image, nil, nil , nil);
    self.imageView.image = image;
    self.imageView.contentMode = UIViewContentModeScaleAspectFill;
    [self dismissViewControllerAnimated:YES completion:NULL];
}

- (void) imagePickerControllerDidCancel: (UIImagePickerController *) picker
{
    [self dismissViewControllerAnimated:YES completion:NULL];
}

- (IBAction)editVideo:(id)sender
{
    if (self.pathToRecordedVideo)
    {
        UIVideoEditorController *editor = [[UIVideoEditorController alloc] init];
        editor.videoPath = self.pathToRecordedVideo;
        editor.delegate = self;
        [self presentViewController:editor animated:YES completion:NULL];
    }
    else
    {
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error" message:@"No Video Recorded Yet" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:nil, nil];
        [alert show];
    }
}

-(void)videoEditorController:(UIVideoEditorController *)editor didSaveEditedVideoToPath:(NSString *)editedVideoPath
{
    self.pathToRecordedVideo = editedVideoPath;
    if (UIVideoAtPathIsCompatibleWithSavedPhotosAlbum (editedVideoPath))
    {
        UISaveVideoAtPathToSavedPhotosAlbum (editedVideoPath, nil, nil, nil);
    }
    [self dismissViewControllerAnimated:YES completion:NULL];
}

-(void)videoEditorControllerDidCancel:(UIVideoEditorController *)editor
{
    [self dismissViewControllerAnimated:YES completion:NULL];
}