AVPLayer をバックグラウンドで動作させることはできません。アプリの起動時には完璧に動作しますが、(デバイスの) ホーム ボタンを押すと音が止まります。何が問題ですか？
これは APPNAME-.plist です:
<key>UIBackgroundModes</key>
<array>
<string>audio</string>
</array>
私はAppDelegate.hにこのコードを持っています:
#import <UIKit/UIKit.h>
#import <AVFoundation/AVFoundation.h>
#import <AudioToolbox/AudioToolbox.h>
次に AppDelegate.m で
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
NSURL *url = [NSURL URLWithString:@"mp3url"];
// You may find a test stream at <http://devimages.apple.com/iphone/samples/bipbop/bipbopall.m3u8>.
self.playerItem = [AVPlayerItem playerItemWithURL:url];
[_playerItem addObserver:self forKeyPath:@"status" options:0 context:&ItemStatusContext];
self.player = [AVPlayer playerWithPlayerItem:_playerItem];
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
self.viewController = [[ViewController alloc] initWithNibName:@"ViewController" bundle:nil];
self.window.rootViewController = self.viewController;
[self.window makeKeyAndVisible];
return YES;}
次に、このメソッドで：
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object
change:(NSDictionary *)change context:(void *)context {
if (context == &ItemStatusContext) {
NSLog(@"context?");
AVPlayer *thePlayer = (AVPlayer *)object;
if ([thePlayer status] == AVPlayerStatusFailed) {
NSLog(@"error");
// Respond to error: for example, display an alert sheet.
return;
}
if ([thePlayer status] == AVPlayerStatusReadyToPlay) {
NSLog(@"ready");
[[AVAudioSession sharedInstance] setDelegate:self];
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback
error:nil];
[[AVAudioSession sharedInstance] setActive:YES
error:nil];
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
[_player play];
return;
}
if ([thePlayer status] == AVPlayerStatusUnknown) {
NSLog(@"unknown");
}
// Deal with other status change if appropriate.
}
// Deal with other change notifications if appropriate.
[super observeValueForKeyPath:keyPath ofObject:object
change:change context:context];
return;
}