Show next ViewController in block

I have next simple code, for downloading info from service.

UIViewController *nextController;

[request authWithBlock:^(NSDictionary *result, NSError *error) 
    // Result of auth request
    if (!nextController) nextController = [UIViewController alloc] init];
    [navigationController pushViewController: nextController];

And I need show next view when request return success. I want to know - this code are correct, or I must create and show viewcontroller in another place, not in block?



Your code format is correct. But you can improve your code by below

__weak typeof(self) weakSelf = self;
[request authWithBlock:^(NSDictionary *result, NSError *error) 
    // Result of auth request
    if (!error)
        UIViewController *nextController = [UIViewController alloc] init];
        // pass result to nexview controller if you want..
        [weakSelf.navigationController pushViewController: nextController];


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