UILabel background color detection?

Question

Is it possible to detect the colour of a particular UILabel programatically?

The intention for these lines of code, is to change the background from a red colour, to a white colour. Increase the brightness for a brief second then reduce the brightness and follow up with a label background colour back to red.

The issue is that sometimes, the brightness will increase without the background colour changing. Thus resulting in a major flaw in the design for the application. Which is private.

    self.label.backgroundColor = [UIColor colorWithRed:255.0/255 green:255.0/255 blue:255.0/255 alpha: 1.0];
    [UIScreen mainScreen].brightness = 1.0;
    [self performSelector:@selector(resetColor) withObject:self afterDelay:0.05f ];

- (void)resetColor {
    [UIScreen mainScreen].brightness = 0.0;
    self.label.backgroundColor = [UIColor colorWithRed:255.0/255 green:0.0/255 blue:0.0/255 alpha:0.5];

Can anyone see why it would randomly not change the background colour beforehand?

And mainly, is it possible to do the following?

if (self.label.backgroundColor == [UIColor whiteColor]){ or while (self.label.backgroundColor == [UIColor whiteColor){

?

Answer 1

your function:

[self performSelector:@selector(resetColor) withObject:self afterDelay:0.05f ];

which of this function called?

to compare the color are extactly the same: use isEqual: instead of == ie

if ([self.label.backgroundColor isEqual:[UIColor whiteColor]])

otherwise, you should compare the all of Color's elements, ie RGBA