Eu tenho um campo de texto, preciso mostrar o cursor e ocultar o teclado. Parece ok no IOS 6 e IOS 5. Mas no IOS 7 eu posso ver uma pequena linha branca na parte inferior.

Meu código é

UIScrollView *scrollview = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 1024, 768)];
[scrollview setDelegate:self];
[self.view addSubview:scrollview];
[self.view bringSubviewToFront:scrollview];
[scrollview setBackgroundColor:[UIColor blackColor]];

scrollview.contentSize = CGSizeMake(768, 1024);


UITextField *textField = [[UITextField alloc] initWithFrame:CGRectMake(10, 10, 500, 100)];
textField.borderStyle = UITextBorderStyleRoundedRect;
textField.autocorrectionType = UITextAutocorrectionTypeNo;
textField.keyboardType = UIKeyboardTypeDefault;
textField.returnKeyType = UIReturnKeyDone;
textField.clearButtonMode = UITextFieldViewModeWhileEditing;
textField.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
textField.returnKeyType = UIReturnKeyDone;
[textField setUserInteractionEnabled:YES];
[textField setEnabled:YES];
[scrollview addSubview:textField];

// Here I need to show the cursor without showing keyboard
UIView* dummyView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 1, 1)];
((UITextField*)textField).inputView = dummyView;
[((UITextField*)textField) becomeFirstResponder];

Alguém pensando em como consertar isso?