CGAffineTransformTranslate在iOS 3.1.3中不起作用

Question

我试图将UIAlertView从它在屏幕中心的默认位置移动到顶部。我正在使用下面的代码，它适用于iOS 4，但它不会继续使用3.
任何人都有任何想法？

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

解决方案是：

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);
    }