Usage.m

- (void)alertWithTitle:(NSString *)title
               message:(NSString *)message
                 close:(NSString *)closeText
                action:(NSString *)actionText
                  then:(void (^)(void))block
{
    if ([UIAlertController class]) {
        UIAlertController *alert = [UIAlertController alertControllerWithTitle:title
                                                                       message:message
                                                                preferredStyle:UIAlertControllerStyleAlert];
        if (closeText) {
            [alert addAction:[UIAlertAction actionWithTitle:closeText style:UIAlertActionStyleCancel handler:nil]];
        }
        if (actionText) {
            [alert addAction:[UIAlertAction actionWithTitle:closeText style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
                if (block) block();
            }]];
        }
        [self presentViewController:alert animated:YES completion:nil];
    } else {
        AlertViewCallback *callback = nil;
        if (block) {
            callback = [AlertViewCallback callback:block];
        }
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:title
                                                        message:message
                                                       delegate:callback
                                              cancelButtonTitle:closeText
                                              otherButtonTitles:nil];
        if (actionText) {
            [alert addButtonWithTitle:actionText];
        }
        [alert show];
    }
}