Question

If I have white text in my UITextField, the selection window (when selecting text) is invisible because the background on the little window is also white.

Any way to fix this?

Answer 1

Sure! The background color of the loupe always matches the backgroundColor property of the text field. (But not the background property.) Example:

textField.textColor = [UIColor whiteColor];
textField.backgroundColor = [UIColor blackColor];

If your text field absolutely requires a transparent background, you’ll have to fake it—by using a background image containing the graphics underneath the text field. You may do it manually—by taking a screenshot of your interface and cropping it—or programmatically, like this:

#import <QuartzCore/CALayer.h>
...
// `view` contains the graphics underneath the text field
UIGraphicsBeginImageContext(textField.bounds.size);
CGContextRef context = UIGraphicsGetCurrentContext();
CGPoint origin = [textField convertPoint:textField.bounds.origin toView:view];
CGContextTranslateCTM(context, -origin.x, -origin.y);
[view.layer renderInContext:context];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
textField.background = image;

Since the background is drawn on top of the background color, the text field will appear transparent, and you’ll be able to use any background color you want for the loupe.