SKAction playSoundFileNamed通过iphone扬声器没有音频

Question

Has anyone had issues playing audio via the SKAction playSoundFileNamed using iOS Sprite Kit through the external speaker of your iOS device? I have the following code that plays the M4A file with no issue through the headphones; however, no audio is played when I unplug the headphones stepping through code it executes just no sound. I have another app that does not use this method and it plays with no issue.

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    /* Called when a touch begins */

    for (UITouch *touch in touches) {
        CGPoint location = [touch locationInNode:self];
        SKAction *sound = [SKAction playSoundFileNamed:@"blast.m4a" waitForCompletion:NO];
        [self runAction:sound];
 }

Answer 1

I had a similar issue but was able to fix it by setting AudioSession category to Playback. This causes the audio to be routed through the phone's speaker when headphones aren't plugged in.

// at the top of AppDelegate.m
#import <AVFoundation/AVFoundation.h>

// in application:didFinishLaunchingWithOptions:
NSError *error;
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:&error];

You can find more information about this in Apple's Audio Session Programming Guide .

Answer 2

刚刚更新我今天安装了IOS 7.0.4并重新测试，现在我在外部扬声器上有音频，所以我假设它是IOS 7.0.3中的一个错误，因为这是我对设备的唯一改动。