Question

I have a program that test a condition inside a if loop continuously during the run of the programme. But i want this if condition to become true or active for certain period of time(say for 5ms) and then deactivate the if condition for next 10ms. Then continue this pattern continuously until user close the program. I have no idea to approach this, please help me!

Answer 1

I have a Suggestion for you…

Make a method and call this method when you want to start the process with TRUE value.

-(void)yourProcessMethod(BOOL _flag){

  if(_flag){
      //Execute your process 
      //now check for time is it 5ms or not
      if(time elapsed < 5ms){
          [self yourProcessMethod(TRUE)];
      }else{
          [self yourProcessMethod(FALSE)];
      }
  }else{
      //Execute your process (or do nothing if you want to stop it for 10 ms)
      //now check for time is it 10ms or not
      if(time elapsed < 10ms){
          [self yourProcessMethod(FALSE)];
      }else{
          [self yourProcessMethod(TRUE)];
      }

  }
}

EDITED :-

You can use this Piece of code for Checking time elapsed for executing.

NSDate *start = [NSDate date];
// do stuff...
NSTimeInterval timeInterval = [start timeIntervalSinceNow];

timeInterval is the difference between start and now, in seconds, with sub-millisecond precision.

Calculate the time Elapsed i.e timeInterval and check its value and compare it that whether it is < 5ms or 10 [self yourProcessMethod(TRUE/FALSE)];.

I hope this Helps you. 🙂 If yes, you can accept the answer or UpVote it 🙂