5分鐘後停止方法執行

Question

如何在一定時間後停止執行方法？ 我如下調用方法：

[NSTimer scheduledTimerWithTimeInterval:5.0f 
           target:self 
           selector:@selector(doSomeTask) userInfo:nil repeats:YES]; 

在這裏，我已經給5秒鐘的時間間隔。所以這個方法每5秒鐘會被調用一次，所以一旦達到指定的時間我想停止這個方法的執行。

Answer 1

嘗試創建NSTimer，將一段時間只有一次之後調用：

NSTimer *previous [NSTimer scheduledTimerWithTimeInterval:5.0f target:self selector:@selector(doSomeTask) userInfo:nil repeats:YES]; 

[NSTimer scheduledTimerWithTimeInterval:300 target:self selector:@selector(stopPrevious) userInfo:nil repeats:NO]; 

-(void)stopPrevious{ 
    [previous invalidate]; 
} 

Answer 2

你可以嘗試這樣的

NSTimer *reachTimer; 
NSInteger secondsLeft; 

- (void)viewDidLoad { 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view. 
    secondsLeft = 0; 

reachTimer = [NSTimer scheduledTimerWithTimeInterval:5.0f target:self selector:@selector(updateCounter:) userInfo:nil repeats:YES]; 

} 

-(void)updateCounter:(NSTimer *)theTimer{ 
secondsLeft = secondsLeft+5; 

if(secondsLeft>=300) // 60sec * 5min= 300 
{ 
    [reachTimer invalidate]; 
} 

} 

Answer 3

如果你想5分鐘後停止您的電話。然後執行這樣

@interface YourClass() { 
     int count; 
    } 

@end 
    - (void)viewDidLoad { 
     count = 5; 
     NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:5.0f 
            target:self 
            selector:@selector(doSomeTask) userInfo:nil repeats:YES]; 

    } 
    -(void) doSomeTask 
    { 
      count = count + 5; 
      if (count==300) 
      { 
       [timer invalidate]; 
       timer=nil; 
      } 
    } 

Answer 4

由5拍攝計數器變量，並增加每個呼叫（如時間間隔爲5秒）等

counter = counter+5; 

    -(void) doSomeTask { 

    if (counter<=60) { // 5 min = 300 300/5 = 60 

     // Write method body here 

     counter = counter+5 
     } 

     else { 
      [timer invalidate]; 
     } 
    } 

Answer 5

#define TIMER_LIFE_IN_SECONDS 300.0 
@interface YourClass() { 
    NSTimeInterval _startTime; 
} 

self.timer = [NSTimer scheduledTimerWithTimeInterval:5.0f target:self selector:@selector(doSomeTask) userInfo:nil repeats:YES]; 
_startTime = [NSDate timeIntervalSinceReferenceDate]; 


- (void) doSomeTask 
{ 
    // do thing 

    NSTimeInterval now = [NSDate timeIntervalSinceReferenceDate]; 
    if (now - _startTime > TIMER_LIFE_IN_SECONDS) { 
     [self.timer invalidate]; 
     self.timer = nil; 
    } 
} 

Answer 6

嘗試此;

int count; 
NSTimer *timer; 

-(void)startTimertillLimit:(int)limit { 
    count = 0; 
    timer = [NSTimer scheduledTimerWithTimeInterval:5 
               target:self 
              selector:@selector(doSomething:) 
              userInfo:[NSString stringWithFormat:@"%d",limit] 
              repeats:YES]; 
} 

-(void)doSomething:(NSTimer*)sender 
{ 
    int limit = (int)[sender.userInfo intValue]; 
    count = count + 5; 
    if (count > limit) 
    { 
     [timer invalidate]; 
     timer=nil; 
     count = 0; 
    } 
}