CGAffineTransformTranslateがiOS 3.1.3で動作しない

Question

私はUIAlertViewを画面中央のデフォルト位置から上に移動しようとしています。下記のコードを使用していますが、iOS 4でも動作しますが、3では動きません。
誰もが考えていますか？

 
UIAlertView *newSubscriptionAlertView = [[UIAlertView alloc] initWithTitle:@"Ndrysho abonimin" message:@" " delegate:self cancelButtonTitle:@"Anullo" otherButtonTitles:@"Ruaj", nil]; 
    subscriptionNameField = [[UITextField alloc] initWithFrame:CGRectMake(12.0, 45.0, 260.0, 22.0)]; 
    subscriptionNameField.text = [[subscriptions objectAtIndex:changeCode] title]; 
    subscriptionNameField.autocorrectionType = UITextAutocorrectionTypeNo; 
    subscriptionNameField.autocapitalizationType = UITextAutocapitalizationTypeNone; 
    [subscriptionNameField setBackgroundColor:[UIColor whiteColor]]; 
    [newSubscriptionAlertView addSubview:subscriptionNameField]; 
    [subscriptionNameField becomeFirstResponder]; 
    [subscriptionNameField release]; 
    CGAffineTransform moveUp = CGAffineTransformTranslate(newSubscriptionAlertView.transform, 0.0, 0.0); 
    [newSubscriptionAlertView setTransform:moveUp]; 
    [newSubscriptionAlertView show]; 
    [newSubscriptionAlertView release]; 

Answer 1

解決策はこれです：

 
if (!([[[UIDevice currentDevice] systemVersion] floatValue] > 4.0)) { 
//This is for iOS versions below 4.0 
     changeFolderAlertView.transform = CGAffineTransformMakeTranslation(0.0f, 70.0f); 
    } else { 
//This is for iOS4.0+ 
     changeFolderAlertView.transform = CGAffineTransformMakeTranslation(0.0f, 0.0f); 
    }