iPhone-AlertView文本字段使用iOS6进行切换

Question

我的UIAlertView文本字段使用iOS6时出现问题。文本字段一直移动到顶部。当我使用iOS7时，文本字段位于正确的位置。有人能帮我吗？这是代码：

UIAlertView *message = [[UIAlertView alloc] initWithTitle:@"Item?"
                                                  message:nil
                                                 delegate:self
                                        cancelButtonTitle:@"Cancel"
                                        otherButtonTitles:@"Add another", @"Done",nil];
[message setAlertViewStyle:UIAlertViewStylePlainTextInput];
[message textFieldAtIndex:0].autocapitalizationType = UITextAutocapitalizationTypeWords;
[message show];

文本字段显示在标题文本上（此处：项目？）

Answer 1

你试过这个吗：

-(void)willPresentAlertView:(UIAlertView *)alertView {
if ([[[UIDevice currentDevice] systemVersion] floatValue] <7) 
   {
    [alertView setFrame:CGRectMake(17, 30, 286, 280)];
    NSArray *subviewArray = [alertView subviews];
    UILabel *message = (UILabel *)[subviewArray objectAtIndex:2];
    [message setFrame:CGRectMake(10, 46, 260, 20)];
    UIButton *cancelbutton = (UIButton *)[subviewArray objectAtIndex:3];
    [cancelbutton setFrame:CGRectMake(10, 125, 260, 42)];
    UIButton *savebutton = (UIButton *)[subviewArray objectAtIndex:4];
    [savebutton setFrame:CGRectMake(10, 170, 260, 42)];
    UIButton *saveAddbutton = (UIButton *)[subviewArray objectAtIndex:5];
    [saveAddbutton setFrame:CGRectMake(10, 220, 260, 42)];
    UITextField *textfield = (UITextField *)[subviewArray objectAtIndex:6];
    [textfield setFrame:CGRectMake(10, 80, 266, 50)];
    UITextField *placeTF = (UITextField *)[subviewArray objectAtIndex:7];
    [placeTF setFrame:CGRectMake(15, 70, 256, 50)];
   }
}

Answer 2

实际上，这可以通过检测系统版本手动修复。以下是在这篇文章中做到这一点的正确方法

Answer 3

试试这个代码，它会工作的。

- (IBAction)showAlert:(id)sender
{
    UIAlertView *alertView = [[UIAlertView alloc] init];
    alertView.delegate = self;
    alertView.title = @"Item?";
    alertView.message = nil;
    alertView.alertViewStyle = UIAlertViewStylePlainTextInput;
    [alertView addButtonWithTitle:@"Cancel"];
    [alertView addButtonWithTitle:@"Add another"];
    [alertView addButtonWithTitle:@"Done"];
    [alertView show];
}