UIAlertController with dictionary and blocks

IntroViewController.m

- (IBAction)tamLanguageChangeButton:(id)sender {
    __weak __typeof(self)weakSelf = self;
    UIAlertController *alert;
    
    // if user vill tap to already selected language
    void (^cancelBlock)(UIAlertAction * _Nonnull action) =  ^(UIAlertAction * _Nonnull action) {
        dispatch_async(dispatch_get_main_queue(), ^{
            [weakSelf dismissViewControllerAnimated:YES completion:nil];
        });
    };
    
    //if user tap to different language
    __block NSMutableDictionary *actionLanguageDict = [NSMutableDictionary dictionary];
    void (^handlerBlock)(UIAlertAction * _Nonnull action) = ^(UIAlertAction * _Nonnull action) {
        [weakSelf showLoader];

        NSSet *keysSet = [actionLanguageDict keysOfEntriesPassingTest:^BOOL(NSString *key, UIAlertAction *obj, BOOL * _Nonnull stop) {
            return [obj isEqual:action];
        }];
        
        if (keysSet.count) {
            NSString *code = keysSet.allObjects.firstObject;
            
            ASConfiguration *config = SharedAppConfig;
            NSArray *array = [config.languagesList filteredArrayUsingPredicate:[NSPredicate predicateWithBlock:^BOOL(ASLanguage *lang, NSDictionary<NSString *,id> * _Nullable bindings) {
                return [lang.code isEqualToString:code];
            }]];
            
            if (array.count) {
                config.language = array.firstObject;
                [SharedAppDelegate saveConfig];
                
                [SharedNetworkSingleton languageDidChangedCompletionCompletion:^{
                    [weakSelf updateTranslatedItems];
                    [weakSelf hideLoader];
                }];
            }
        }
    };
    
    //alert itself
    alert = [UIAlertController alertControllerWithTitle:@"Please select preferred language" message:nil preferredStyle:UIAlertControllerStyleActionSheet];
    
    UIAlertAction *action;
    BOOL selected;
    UIAlertActionStyle style;
    
    NSArray *langList = [SharedAppConfig languagesList];
    for (ASLanguage *lang in langList) {
        selected = [[SharedAppConfig language] isEqual:lang];
        style = selected ? UIAlertActionStyleDestructive : UIAlertActionStyleDefault;
        
        action = [UIAlertAction actionWithTitle:lang.title style:style handler:(selected ? cancelBlock : handlerBlock)];
        [alert addAction:action];
        [actionLanguageDict setObject:action forKey:lang.code];
    }
    
    [alert addAction:[UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleCancel handler:nil]];
    [self presentViewController:alert animated:YES completion:nil];
}