alternate of sleep command in x code - iphone developement

Question

I have implemented following in my application.

for(i=0;!stopThroughButtons && i<totalMovements;i++){
  [NSThread detachNewThreadSelector:@selector(moveNeedle) toTarget:self withObject:nil];
  sleep(0.3);
 }

Here sleep is a function with argument of unsigned int type.

Sleep method uses seconds to sleep.

I want to give the timing in milliseconds to sleep.

Which best alternate is available?

thanks in advance for sharing your knowledge.

sagar

Answer 1

You probably want nanosleep() instead, which takes nanoseconds. Bear in mind these sleep times are not accurate though, so what you really have is the ability to specify it more accurately than a few hundredths of seconds.

Answer 2

Two options:
int usleep(useconds_t useconds) will use microseconds
int nanosleep(const struct timespec *rqtp, struct timespec *rmtp) will use nanoseconds

Answer 3

There's also NSThread's +sleepForTimeInterval:, which takes time in fractional seconds. For example:

[NSThread sleepForTimeInterval:0.05];

should sleep for 50 milliseconds.

Answer 4

As has been mentioned in the other thread you started, you probably don't want to sleep on the main thread, as that blocks event delivery and freezes the UI. Instead of looping and sleeping, you probably want to fire a timer and perform your action when the timer fires.