spritekit游戏中的声音效果开启/关闭

Question

在gameScene.m中，我们如何在玩游戏时使用skspritenode打开/关闭音乐，使用下面的代码我可以完美地播放声音，但是每当用户想要时打开或关闭游戏中的声音以播放自己的ipad。

//.h file 
#import <SpriteKit/SpriteKit.h> 
@interface MyScene : SKScene 


//.m file 
#import "MyScene.h" 
#import <AVFoundation/AVAudioPlayer.h> 
@interface MyScene() <SKPhysicsContactDelegate> 
@end 

@import AVFoundation; 

@implementation MyScene 
{AVAudioPlayer *_AudioPlayer;} 



-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { 
if (_gameLayer.speed > 0) { 
    //for flying plane 
    _playerPlane.physicsBody.velocity = CGVectorMake(0, 0); 
    [_playerPlane.physicsBody applyImpulse:CGVectorMake(0, 14)]; 
    [self jumpsound]; 
} 
-(void)didBeginContact:(SKPhysicsContact *)contact{ 
     _gameLayer.speed = 0; 
     [self removeAllActions]; 
     skspritenodeGameOver.hidden = NO; 
     [self hitSound];} 

- (void)jumpsound 
{ 
NSURL *file = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"jump" ofType:@"wav"]]; 
_AudioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:file error:nil]; 

[_AudioPlayer setVolume:0.5]; 
[_AudioPlayer play]; 
} 

- (void)hitsound 
{ 
    NSURL *file = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"jump" ofType:@"wav"]]; 
_AudioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:file error:nil]; 

[_AudioPlayer setVolume:0.5]; 
[_AudioPlayer play]; 
} 
@end 

Answer 1

要将声音效果添加到您的游戏中，我建议使用playSoundFileNamed SKAction而不是AVAudioPlayer。下面是如何做到这一点的例子：

@property BOOL playSounds; 

// Define action to play a sound effect 
_playJumpSound = [SKAction playSoundFileNamed@"jump.wav" waitForCompletion:NO]; 

// Play sound effect only if playSounds is set 
if (_playSounds) { 
    [self runAction:_playJumpSound]; 
} 

编辑：添加听起来方法。声音只会在_playSounds == YES时播放。

- (void) playJumpSound 
{ 
    if (_playSounds) { 
     [self runAction:_playJumpSound]; 
    } 
} 

- (void) playHitSound 
{ 
    if (_playSounds) { 
     [self runAction:_playHitSound]; 
    } 
}