MPVolumeView가 ios 8에서 작동하지 않습니다.

Question

재생되는 동영상의 볼륨을 변경하고 싶습니다. 내가 MPVolumeView를 사용해야한다는 것을 알고, 다음 코드는 ios 6.1 (ipod touch 4g에서 테스트)에서 완벽하게 작동했지만 ios 8.1 (시뮬레이터 버전 8.1 (550.3))에서는 작동하지 않습니다. - 볼륨 슬라이더가 나타나지 않습니다. . 내가 놓친 것을 도와주세요.

#import "ViewController.h" 
#import <MediaPlayer/MediaPlayer.h> 

@interface ViewController() 

@property (retain, nonatomic) MPMoviePlayerController *player; 
@property (retain, nonatomic) MPVolumeView *volumeView; 

@end 

@implementation ViewController 

- (void)viewDidLoad { 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view, typically from a nib. 

    NSURL *movieUrl = [[NSBundle mainBundle] URLForResource:@"IMG_0001" withExtension:@"MOV"]; 
    self.player = [[MPMoviePlayerController alloc] initWithContentURL:movieUrl]; 
    self.player.view.frame = self.view.bounds; 

    // Here is where you set the control Style like fullscreen or embedded 
    self.player.controlStyle = MPMovieControlStyleEmbedded; 
    self.player.scalingMode = MPMovieScalingModeAspectFit; 
    self.player.allowsAirPlay = YES; 
    [self.view addSubview:self.player.view]; 

    [self.player prepareToPlay]; 
    [self.player play]; 

    self.volumeView = [ [MPVolumeView alloc] init]; 
    [self.volumeView setShowsVolumeSlider:YES]; 
    [self.volumeView setShowsRouteButton:YES]; 
    self.volumeView.frame = CGRectMake(0, 0, self.view.bounds.size.width, 30); 
    // show volume view border 
    self.volumeView.layer.borderColor = [[UIColor redColor] CGColor]; 
    self.volumeView.layer.borderWidth = 1.0f; 

    // next 6 lines - is my try to add slider images, but no luck again 
    UIImage *sliderThumbImage = [UIImage imageNamed:@"sliderthumb.png"]; 
    UIImage *sliderMinTrackImage = [UIImage imageNamed:@"slidermintrack.png"]; 
    UIImage *sliderMaxTrackImage = [UIImage imageNamed:@"slidermaxtrack.png"]; 
    [self.volumeView setMinimumVolumeSliderImage:sliderMinTrackImage forState:UIControlStateNormal]; 
    [self.volumeView setMaximumVolumeSliderImage:sliderMaxTrackImage forState:UIControlStateNormal]; 
    [self.volumeView setVolumeThumbImage:sliderThumbImage forState:UIControlStateNormal]; 

    [self.view addSubview:self.volumeView]; 
} 

@end 

P. xCode 6.1

Answer 1

슬프게도 시뮬레이터에서 볼륨 바가 표시되지 않습니다. 장치에서 테스트해야합니다.