ios - Objective-C delay action with blocks

Question

I know that there are several ways of delaying an action in Objective-C like:

performSelector:withObject:afterDelay:

or using NSTimer.

But there is such a fancy thing called blocks where you can do something like this:

[UIView animateWithDuration:1.50 delay:0 options:(UIViewAnimationOptionCurveEaseOut|UIViewAnimationOptionBeginFromCurrentState) animations:^{

    }completion:^(BOOL finished){
}];

Unfortunately, this method applies only to animating things.

How can I create a delay with a block in one method so I don't have to use all those @selectors and without the need to create a new separate method? Thanks!

Answer 1

use dispatch_after:

double delayInSeconds = 2.0;
dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, delayInSeconds * NSEC_PER_SEC);
dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
    //code to be executed on the main queue after delay
    [self doSometingWithObject:obj1 andAnotherObject:obj2];
});