Question

i am using the following method in a uiview subclass:

[self performSelector:@selector(timeout) withObject:nil afterDelay:20];

The method is called after 20 seconds as expected.
In another method i try to cancel the perform request using the following code:

[NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(timeout) object:nil];

i’ve also tried

[NSRunLoop cancelPreviousPerformRequestsWithTarget:self selector:@selector(timeout) object:nil];

both messages don’t bring the expected result an the timeout method is still called.
can anybody explain me what i am doing wrong and how to do it the right way ?

cheers from austria
martin

Answer 1

Two points
1. Are both self same object??
2. Is [NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(timeout) object:nil]; performed on same thread on which you called [self performSelector:@selector(timeout) withObject:nil afterDelay:20]; ?

Check these two problems.