Waiting for multiple blocks to finish

Question

I have those methods to retrieve some object information from the internet:

- (void)downloadAppInfo:(void(^)())success
                failure:(void(^)(NSErr         


        

Answer 1

Here is my solution without any dispatch_group.

+(void)doStuffWithCompletion:(void (^)(void))completion{
    __block NSInteger stuffRemaining = 3;

    void (^dataCompletionBlock)(void) = ^void(void) {
        stuffRemaining--;

        if (!stuffRemaining) {
            completion();
        }
    };

    for (NSInteger i = stuffRemaining-1; i > 0; i--) {
        [self doOtherStuffWithParams:nil completion:^() {
            dataCompletionBlock();
        }];
    }
}