Custom completion block for my own method

Question

I have just discovered completion blocks:

 completion:^(BOOL finished){


                     }];

What do I need to do to have my own method take a completion block?

Answer 1

1) Define your own completion block,

typedef void(^myCompletion)(BOOL);

2) Create a method which takes your completion block as a parameter,

-(void) myMethod:(myCompletion) compblock{
    //do stuff
    compblock(YES);
}

3)This is how you use it,

[self myMethod:^(BOOL finished) {
    if(finished){
        NSLog(@"success");
    }
}];