码迷,mamicode.com
首页 > 移动开发 > 详细

iOS后台运行播放无声音频 测试可行

时间:2018-05-10 14:24:51      阅读:264      评论:0      收藏:0      [点我收藏+]

标签:播放   hex   error   handler   测试   ber   orm   tom   res   

如果打回来了,就自认倒霉吧

制作无声音频。

 

 


 

@interface AppDelegate ()

{

NSInteger count;

}

 

@property(strong, nonatomic)NSTimer *mTimer;

@property(assign, nonatomic)UIBackgroundTaskIdentifier backIden;

 

- (void)applicationDidEnterBackground:(UIApplication *)application {

 

_mTimer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(countAction) userInfo:nil repeats:YES];

[[NSRunLoop currentRunLoop] addTimer:_mTimer forMode:NSRunLoopCommonModes];

[self beginTask];

 

}

//计时

-(void)countAction{

NSLog(@"%li",count++);

}

//申请后台

-(void)beginTask

{

NSLog(@"begin=============");

_backIden = [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:^{

 

NSLog(@"将要挂起=============");

[self endBack];

}];

}

//注销后台

-(void)endBack

{

NSLog(@"end=============");

[[UIApplication sharedApplication] endBackgroundTask:_backIden];

_backIden = UIBackgroundTaskInvalid;

}

- (void)applicationWillEnterForeground:(UIApplication *)application {

 

[self endBack];

 

}

 

 


 

#import <AVFoundation/AVFoundation.h>

 

 

 

@property(strong, nonatomic)AVAudioPlayer *mPlayer;

 

@property(assign, nonatomic)CGFloat mCount;

 

- (void)viewDidLoad {

[super viewDidLoad];

 

 

_mCount = 0;

 

NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:10 target:self selector:@selector(countTime) userInfo:nil repeats:YES];

[[NSRunLoop currentRunLoop] addTimer:timer forMode:NSRunLoopCommonModes];

 

 

}

 

-(void)countTime{

_mCount+=10;

NSLog(@"%f",_mCount);

 

if ([[UIApplication sharedApplication] backgroundTimeRemaining] < 60.) {//当剩余时间小于60时,开如播放音乐,并用这个假前台状态再次申请后台

NSLog(@"播放%@",[NSThread currentThread]);

[self playMusic];

//申请后台

[[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:^{

NSLog(@"我要挂起了");

}];

}

}

 

-(void)playMusic{

//1.音频文件的url路径,实际开发中,用无声音乐

NSURL *url=[[NSBundle mainBundle]URLForResource:@"wusheng.mp3" withExtension:Nil];

 

//2.创建播放器(注意:一个AVAudioPlayer只能播放一个url)

_mPlayer=[[AVAudioPlayer alloc]initWithContentsOfURL:url error:Nil];

 

//3.缓冲

[_mPlayer prepareToPlay];

_mPlayer.numberOfLoops = -1;

//4.播放

[_mPlayer play];

}

iOS后台运行播放无声音频 测试可行

标签:播放   hex   error   handler   测试   ber   orm   tom   res   

原文地址:https://www.cnblogs.com/xujiahui/p/9019173.html

(0)
(0)
   
举报
评论 一句话评论(0
登录后才能评论!
© 2014 mamicode.com 版权所有  联系我们:gaon5@hotmail.com
迷上了代码!