#import "RootViewController.h"
#import <AudioToolbox/AudioToolbox.h>
@interface RootViewController ()@end@implementation RootViewController- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];if (self) {// Custom initialization
    }return self;
}- (void)viewDidLoad
{[super viewDidLoad];[self creatUIButton];
}
-(void)creatUIButton{UIButton * btn=[UIButton buttonWithType:UIButtonTypeCustom];btn.frame=CGRectMake(100, 100, 100, 100);btn.backgroundColor=[UIColor grayColor];[btn setTitle:@"播放" forState:UIControlStateNormal];[btn setTitleColor:[UIColor cyanColor ] forState:UIControlStateNormal];[btn addTarget:self action:@selector(pressBtn:) forControlEvents:UIControlEventTouchUpInside];[self.view addSubview:btn];
}
-(void)pressBtn:(id)sender{//1.获取全路径 因为加载音效需要使用CFURLRef 来加载音乐，所以使用能和它相互转换的NSURL 来转换路径NSString * pathStr= [[NSBundle mainBundle]pathForResource:@"sound" ofType:@"wav"];NSURL * url=[NSURL fileURLWithPath:pathStr];//2.创建音效ID 一个ID代表一个音效文件
    SystemSoundID SID;//3.将音乐文件与ID绑定   将url 强转 将sid与之绑定AudioServicesCreateSystemSoundID((__bridge CFURLRef)url, &SID);//4.播放音效
    AudioServicesPlayAlertSound(SID);//5.当我们需要在音效播放结束时取消该音效则需要使用以下方法 函数名固定
    AudioServicesAddSystemSoundCompletion(SID, nil, nil,finishSound, nil);}
//该函数为系统方法，函数名，参数固定，不能修改
void finishSound(SystemSoundID SID,void * finish){//6.撤销SID
    AudioServicesDisposeSystemSoundID(SID);}