Chris Chris - 3 months ago 23
Objective-C Question

NSTimer with anonymous function / block?

I want to be able to schedule three small events in the future without having to write a function for each. How can I do this using

NSTimer
? I understand blocks facilitate anonymous functions but can they be used within
NSTimer
and if so, how?

[NSTimer scheduledTimerWithTimeInterval:gameInterval
target:self selector:@selector(/* I simply want to update a label here */)
userInfo:nil repeats:NO];

Answer

You can make use of dispatch_after if you want to achieve something similar to NSTimer and block execution.

Here is the sample code for the same:

    int64_t delayInSeconds = gameInterval; // Your Game Interval as mentioned above by you

    dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, delayInSeconds * NSEC_PER_SEC);

    dispatch_after(popTime, dispatch_get_main_queue(), ^(void){

        // Update your label here. 

    });

Hope this helps.