设置颜色以编程方式绘制的视图

Question

I'm in the middle of fixing my UITextView to not show underneath the keyboard, but instead to resize it to the correct constraints. This is probably a stupid question and there is most likely an easy fix alongside this stupid question, but I need to colour the view, that is currently black, to a whiteColor - and it seems that I'm blanking on the correct line of code to do so. I have searched Stack Overflow and Google for sometime but I have not found a single line of code that doesn't return error(s).

The black rectangle behind the keyboard.

- (void)keyboardDidShow:(NSNotification *)aNotification {
    NSDictionary* info = [aNotification userInfo];
    CGRect kbRect = [[info objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];
    kbRect = [[self view] convertRect:kbRect fromView:nil];
    CGSize kbSize = kbRect.size;
    CGRect aRect = self.view.frame;

    /* This should work, but doesn't quite qet the job done */
    //    UIEdgeInsets insets = self.textView.contentInset;
    //    insets.bottom = kbSize.height;
    //    self.textView.contentInset = insets;
    //
    //    insets = self.textView.scrollIndicatorInsets;
    //    insets.bottom = kbSize.height;
    //    self.textView.scrollIndicatorInsets = insets;

    /* Instead, we just adjust the frame of the uitextview */
    aRect.size.height -= kbSize.height + VERTICAL_KEYRBOARD_MARGIN;
    self.companyTextField.frame = aRect;

    // If active text field is hidden by keyboard, scroll it so it's visible
    // Your application might not need or want this behavior.
    if (!CGRectContainsPoint(aRect, self.companyTextField.frame.origin) ) {
        CGPoint scrollPoint = CGPointMake(0.0, self.companyTextField.frame.origin.y - kbSize.height);
        [self.companyTextField setContentOffset:scrollPoint animated:YES];
    }
}

Answer 1

Assuming self.companyTextField is what you're talking about:

self.companyTextField.backgroundColor = [UIColor whiteColor];

If you're talking about the main view:

self.view.backgroundColor = [UIColor whiteColor];

Answer 2

Set the background color of the container view to white. (the main window view) and also the scrollview background color to white.

Or if you have another view behind it set it to white.

Edit: Your code shows a scrollview, check its color.