Control the execution of a Function

Question

I have an action from my UIButton that calls a function. Eg:

-(void)function:(id)sender{
    // execute some code here
}

• When I click on the UIButton this function will start
• If I click again, and the function isn't finished - I would like to stop the function, and call it again
• If the function has finished, just call the function again

Is this possible?

Answer 1

Basically you can work with an ivar to indicate that function has not finished executing. Something like:

    BOOL isFinished;

    -(void)function:(id)sender{

            if(!isFinished) {
                // stop your process
                // start it again
                // and indicate that it's running (isFinished is still false)
            }
            else {
                isFinished = NO;
                // just start your process
            }
        }

When your function/process has finished, set isFinished = YES; from there.