ios에서 타이머에 스레드를 사용하는 방법 _ 검색편

구글에 다음으로 검색

nstimer multi thread

이건 메인스레드에서만 사용가능한건가?

백그라운드 개념도 있던데,  사용불가한가?

NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(timer) userInfo:nil repeats:NO];

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

    self.timer = [NSTimer timerWithTimeInterval:0.5 target:self selector:@selector(countDown) userInfo:nil repeats:YES];

    [[NSRunLoop mainRunLoop] addTimer:self.timer forMode:NSRunLoopCommonModes];

NSRunLoopCommonModes : 

모드로 이것을 사용해야, 보통은 다른 작업을 할때, 타이머가 멈추는데..

타이머가 멈추는 것을 막을 수 있다

NSRunLoop를 사용

http://jaminya.com/index.php/en/component/content/article/39-ios/54-multithreading-nstimer

069.-(void) startOperation {

070. 

071.    // run task A for 1/10 second

072.    timerA = [NSTimer timerWithTimeInterval:1.0/10.0

073.                                              target:self

074.                                            selector:@selector(taskA)

075.                                            userInfo:nil

076.                                             repeats:YES];

077.     

078.    // run task B for 1/10 second

079.    timerB = [NSTimer timerWithTimeInterval:1.0/10.0

080.                                     target:self

081.                                   selector:@selector(taskB)

082.                                   userInfo:nil

083.                                    repeats:YES];

084. 

085.    NSRunLoop *loop = [NSRunLoop mainRunLoop];

086.    [loop addTimer:timerA forMode:NSDefaultRunLoopMode];

087.    [loop addTimer:timerB forMode:NSDefaultRunLoopMode];

088. 

089.}

090. 

091.-(void) stopOperation

092.{

093.    [timerA invalidate];

094.    [timerB invalidate];

095.}

096. 

- See more at: http://jaminya.com/index.php/en/component/content/article/39-ios/54-multithreading-nstimer#sthash.gG5iI1L0.dpuf

타이머 셋팅부분

If you need this so timers still run when you scroll your views (or maps), you need to schedule them on different run loop mode. Replace your current timer:

[NSTimer scheduledTimerWithTimeInterval:0.5
                                 target:self
                               selector:@selector(timerFired:)
                               userInfo:nil repeats:YES];

With this one:

NSTimer *timer = [NSTimer timerWithTimeInterval:0.5
                                           target:self
                                         selector:@selector(timerFired:)
                                         userInfo:nil repeats:YES];
[[NSRunLoop mainRunLoop] addTimer:timer forMode:NSRunLoopCommonModes];

참고하면 좋을듯

http://stackoverflow.com/questions/8304702/how-do-i-create-a-nstimer-on-a-background-thread

구현된 상세코드

-------- 샘플 코드 ----------

void _funcTimer()

{

NSDateFormatter *formatter = [[NSDateFormatter alloc] init];

[formatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];

    

    NSString * strTime =[ NSString stringWithFormat:@"%@", [formatter stringFromDate:[NSDate date]]];

    

    NSLog(@"%@", strTime);

    

    [formatter release];

}

+(dispatch_source_t) setTimer

{    

    dispatch_source_t timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER,

                                                     0, 0, dispatch_get_main_queue());

    

    uint64_t interval = 2ull*NSEC_PER_SEC; // NSEC_PER_MSEC

    

    uint64_t leeway = 1ull*NSEC_PER_SEC;

    

    if (timer)

    {

        dispatch_source_set_timer(timer, dispatch_walltime(NULL, 0), interval, leeway);

        

        dispatch_source_set_event_handler_f(timer, (dispatch_function_t)&_funcTimer);

        

        dispatch_resume(timer);

    }

    

    return timer;

}

+(void) endTimer:(dispatch_source_t) timer

{

    if (timer)

        dispatch_release(timer);

    

    timer = nil;

}

TCP/IP 사용 관련하여 코딩되어있는부분.

알맞은 부분만 추출해 볼 필요 있음

NSTimer *readtimer;
NSThread *readthread;

 readtimer= [[NSTimer scheduledTimerWithTimeInterval:TimerTime target:self 
            selector:@selector(recvthreadfunc:)
            userInfo:nil
             repeats:YES]retain];
 
 close(sockfd);
 
    [super viewDidLoad];
}

-(void*)recvthreadfunc:(NSTimer *)aTimer{
 readthread = [[NSThread alloc] initWithTarget:self selector:@selector(recvthreadfunc:)object:nil];
 [readthread start];
 return 0;
}
- (void *)recvthreadfunc:(id)anObject{
 if((n=read(c_socket , recvbuff,sizeof(recvbuff)))>0){
  recvbuff[n]='\0';
  NSLog(@"%s",recvbuff);
  write(c_socket,recvbuff,n);
 }

[출처] [iPhone] 쓰레드(Thread) 타이머(Timer) 셋트|작성자 한아랑