UIAlertViewを使って値を入力する方法

// Create Alert 

UIAlertView* av = [UIAlertView new]; 

av.delegate = self;

av.title = @"New Folder"; 

// Add Buttons 

[av addButtonWithTitle:@"OK"]; 

[av addButtonWithTitle:@"Cancel"]; 

// Make Space for Text View 

av.message = @"\n"; 

// Adjust the frame 

CGRect frame = av.frame; 

frame.origin.y -= -100.0f; 

av.frame = frame; 

// ここで　UITextFieldを追加してやる

UITextField* text 

= [[UITextField alloc] initWithFrame:CGRectMake(20.0, 45.0, 245.0, 25.0)]; 

text.borderStyle = UITextBorderStyleRoundedRect; 

[av addSubview:text]; 

[text becomeFirstResponder]; 

[av show]; 

NSLog(@"text->%@",text.text);

[text release];

[av release];