iOS Blocks - defining UIView animation-like blocks

cocoa, cocoa-touch, ios, objective-c, objective-c-blocks

Solution

You can have a method declaration such as:

- (void) performAnimationWithCompletion:(void (^)(BOOL finished))completion {

[UIView animateWithDuration:0.5 animations:^{
            // your own animation code 
            // ...
            } completion:^(BOOL finished) {
                // your own completion code

                // if completion block defined, call it
                if(completion){
                    completion(YES);
                }
            }];

}

Then, you can call it with:

[instance performAnimationWithCompletion:^(BOOL complete){
      // define block code to be executed on completion
}];

Problem

I'm trying to create a custom block like the `UIView` animation blocks. Basically I want to be able to pass either a method or any number of instructions and also provide a completion handler. My question is how would I specify the arguments part of the block definition?

Original source