MPMoviePlayerController 从照片库加载视频，播放速度如此之快

Question

// CameraViewController.h

@interface CameraViewController : UIViewController{

UIImagePickerController *_picker;

}

@property (strong, nonatomic) IBOutlet UIImageView *imageView;

@property (nonatomic, 保留) MPMoviePlayerController *player;

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

// CameraViewController.m

@interface CameraViewController ()

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

@结束

@implementation CameraViewController

@synthesize imageView = _imageView;

@synthesize player = _player;

@synthesize playView = _playView;

• (void)viewDidLoad

{

[super viewDidLoad];

_picker = [[UIImagePickerController alloc] init];

}

• (void)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 委托

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

  UIImage *image = nil;

  NSURL *imageURL = nil;

  imageURL = [信息 valueForKey:UIImagePickerControllerMediaURL];

  如果 (imageURL == nil) {

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

  }

  否则 {

  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];
  

  }

  [pickerdismissViewControllerAnimated:YES 完成:NULL];

}

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

  [pickerdismissViewControllerAnimated:YES 完成:NULL];

}

pragma mark - 用户定义

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

  MPMoviePlayerViewController *player = [通知对象];

  [[NSNotificationCenter defaultCenter] removeObserver:self 名称：MPMoviePlayerPlaybackDidFinishNotification 对象：播放器];

  [player.view removeFromSuperview];

}

movieFinishedCallback:方法会被立即调用，所以视频不能完全播放。

如何解决？

Answer 1

苹果建议：

使用 AVPlayer 播放来自 iPod 库、相机胶卷或通过 iTunes 文件共享的视频。