如何从不同控制器控制AV播放器

Question

我有2个ViewControllers，每个控制器都有几个按钮来播放和停止音频。该音频已经被部署在一个单独的模型，以便能够从两个ViewControllers访问，但我不知道这是正确的方式...

#import <UIKit/UIKit.h> 
#import "AudioController.h" 

@interface NowViewController : UIViewController 

@property (nonatomic, strong) AudioController *AudioModel; 

- (IBAction)PauseButton:(UIButton *)sender; 
- (IBAction)PlayButton:(UIButton *)sender; 

@end 

#import "NowViewController.h" 

@interface NowViewController() 

@end 

@implementation NowViewController 

- (void)viewDidLoad{ 

    [super viewDidLoad]; 
    self.AudioModel = [[AudioController alloc] init]; 

} 

- (IBAction)PlayButton:(UIButton *)sender { 

    [self.AudioModel PlayAudio]; 

} 

- (IBAction)PauseButton:(UIButton *)sender { 

    [self.AudioModel PauseAudio]; 
} 

@end 

#import <UIKit/UIKit.h> 

#import "AudioController.h" 

@interface CategoriesViewController : UIViewController 

@property (nonatomic, strong) AudioController *AudioModel; 

- (IBAction)PauseButton:(UIButton *)sender; 
- (IBAction)PlayButton:(UIButton *)sender; 

@end 

#import "NowViewController.h" 

@interface NowViewController() 

@end 

@implementation NowViewController 

- (void)viewDidLoad{ 
    [super viewDidLoad]; 
    self.AudioModel = [[AudioController alloc] init]; 
} 

- (IBAction)PlayButton:(UIButton *)sender { 
    [self.AudioModel PlayAudio]; 
} 

- (IBAction)PauseButton:(UIButton *)sender { 
    [self.AudioModel PauseAudio]; 
} 

@end 

我的问题是，如果我从一个页面播放音频和导航到另外一个的话，我不能停止的声音。同样的道理，我不能在多任务中播放/暂停。这里的AudioModel的代码：

#import <Foundation/Foundation.h> 
#import <AVFoundation/AVFoundation.h> 

@interface AudioController : NSObject{ 

    AVPlayer *Player; 
} 

- (void)PlayAudio; 
- (void)PauseAudio; 

@end 

#import "AudioController.h" 

@implementation AudioController 

- (void)PlayAudio { 
    Player = [[AVPlayer alloc] initWithURL:[NSURL URLWithString:url]]; 
    [Player play]; 
} 

- (void)PauseAudio { 

    [Player pause]; 
} 

NSString *url = @"http://jo.my/xxx"; 

@end 

感谢您的帮助！

Answer 1

您正在为每个控制器的viewDidLoad方法创建AudioController类的两个不同实例。

您可以通过多种方式解决您的问题。例如，在单例中转换AudioController类。