我收到一个错误
No visible @interfcae GlobalMediaPlayer declares selector add sublayer
.h
#import <Foundation/Foundation.h>
#import <AVFoundation/AVFoundation.h>
@interface GlobalMediaPlayer : NSObject
+(GlobalMediaPlayer *)sharedInstance;
-(void)playFromURL:(NSString *)url;
.m
#import "GlobalMediaPlayer.h"
static GlobalMediaPlayer *sharedInstance = nil;
@interface GlobalMediaPlayer ()
{
AVPlayer *avPlayer;
}
@end
@implementation GlobalMediaPlayer
-(id)init{
if(self = [super init]){
}
return self;
}
+(GlobalMediaPlayer *)sharedInstance{
if(!sharedInstance){
sharedInstance = [[[self class] alloc] init];
}
return sharedInstance;
}
-(void)playFromURL:(NSString *)url{
avPlayer = [AVPlayer playerWithURL:[NSURL URLWithString:@"http://www.someurl/something.mp3"]];
AVPlayerLayer *avPlayerLayer = [AVPlayerLayer playerLayerWithPlayer:avPlayer];
avPlayerLayer.frame = CGRectMake(0, 0, 1920, 1020);
//[self addSublayer:avPlayerLayer]; <---- No visible @interfcae GlobalMediaPlayer declares selector add sublayer error
[avPlayer play];
}
使用它
[[GlobalMediaPlayer sharedInstance] playFromURL:resourceUrl];
最佳答案
将 AVPlayer
代码包装在单例中并没有真正的优势,因为播放器需要能够在 CALayer
中呈现其视频,因此通常最好让UIViewController
中将要呈现内容的播放器代码。
所以在你的 View Controller 中:
@interface MyViewController: UIViewController
@property (nonatomic, strong) AVPlayer *player;
@property (nonatomic, weak) AVPlayerLayer *playerLayer;
@end
- (void)playFromURL:(NSString *)url {
//Instantiate the player and player layer
AVPlayer *player = [AVPlayer playerWithURL:url];
AVPlayerLayer *playerLayer = [AVPlayerLayer playerLayerWithPlayer:player];
//Add the player layer as a sublayer of the desired view or subview
playerLayer.frame = self.view.frame;
[self.view.layer addSublayer:playerLayer];
[player play];
//Retain a reference to the player and player layer for controls/removal
self.avPlayer = player;
self.playerLayer = playerLayer;
}
编辑 我从您的示例代码中注意到该 URL 指向一个 MP3。在这种情况下,您根本不需要担心创建 AVPlayerLayer
的问题。只需实例化播放器并调用 play
就足够了。
关于ios - 添加子层 AVPlayer 共享实例/管理器时出错,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/32769827/