MPMoviePlayerController加载来自Photo库的视频，播放速度非常快

Question

// CameraViewController.h

@interface CameraViewController：UIViewController {

UIImagePickerController *_picker;

}

@property（强，非原子）IBOutlet UIImageView * imageView;

@property（nonatomic，retain）MPMoviePlayerController * player;

• （IBAction）loadImage：（UIButton *）sender;

// CameraViewController.m

@interface CameraViewController（）

@property（强，非原子）MPMoviePlayerController * playView;

@end

@implementation CameraViewController

@synthesize imageView = _imageView;

@synthesize player = _player;

@synthesize playView = _playView;

• （无效）viewDidLoad中

{

[super viewDidLoad];

_picker = [[UIImagePickerController alloc] init];

}

• （无效）didReceiveMemoryWarning

{

[super didReceiveMemoryWarning];

}

• （IBAction）loadImage：（UIButton *）sender {

  _picker.delegate = self;

  _picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

  NSArray * mediaTypes = [NSArray arrayWithObjects：（NSString *）kUTTypeImage，（NSString *）kUTTypeMovie，nil];

  _picker.mediaTypes = mediaTypes;

  [self presentViewController：_picker animated：YES completion：NULL];

}

pragma mark -ImagePicker Delegate

• （void）imagePickerController：（UIImagePickerController *）picker didFinishPickingMediaWithInfo：（NSDictionary *）info {

  UIImage * image = nil;

  NSURL * imageURL = nil;

  imageURL = [info valueForKey：UIImagePickerControllerMediaURL];

  if（imageURL == nil）{

  image = [info valueForKey:UIImagePickerControllerEditedImage];
  
  if (image == nil) {
  
      image = [info valueForKey:UIImagePickerControllerOriginalImage];
  
      _imageView.image = image;
  
  }
  
  else {
  
  }
  

  }

  其他{

  self.player = [[MPMoviePlayerController alloc] initWithContentURL：imageURL];

      [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(movieFinishedCallback:) name:MPMoviePlayerPlaybackDidFinishNotification object:self.player];
  
      self.player.view.frame = CGRectMake(10.0, 10.0, 200.0, 200.0);
  
      self.player.view.backgroundColor = [UIColor clearColor];
  
      self.player.movieSourceType = MPMovieSourceTypeFile;
  
      [self.player prepareToPlay];
  
      [self.view addSubview:self.player.view];
  
      [self.player play];
  

  }

  [picker dismissViewControllerAnimated：YES completion：NULL];

}

• （void）imagePickerControllerDidCancel：（UIImagePickerController *）picker {

  [picker dismissViewControllerAnimated：YES completion：NULL];

}

pragma mark - 用户定义

• （void）movieFinishedCallback：（NSNotification *）通知{

  MPMoviePlayerViewController * player = [通知对象];

  [[NSNotificationCenter defaultCenter] removeObserver：self name：MPMoviePlayerPlaybackDidFinishNotification object：player];

  [player.view removeFromSuperview];

}

将立即调用movieFinishedCallback：方法，因此视频无法完全播放。

如何解决？

Answer 1

Apple建议：

使用AVPlayer播放iPod库，相机胶卷或iTunes文件共享中的视频。