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

Posted 2023-03-08

【中文标题】MPMoviePlayerController 从照片库加载视频，播放速度如此之快

【英文标题】：MPMoviePlayerController load video from Photo library,play so fast

【发布时间】：2013-07-31 12:43:40

【问题描述】：

// 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？

【问题讨论】：

嗯，你能帮帮我吗？

【参考方案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。