Please avoid constant colors

[yurkins]

In my project textfields backgroundColor is transparent,
tintColor is a custom color.
Disabled state is a custom color...

You can put blocks events and / or delegate methods developers can write logic for their cases. Maybe someone doesn't need to be white/red background or display a message in case a field has invalid value ...

Please review methods:

//********************************************************************
(void)setup {
if ([self respondsToSelector:@selector(setTintColor:)])
[self setTintColor:[UIColor blackColor]];
...
}

//********************************************************************
(BOOL) validate{
self.backgroundColor = [UIColor colorWithRed:255 green:0 blue:0 alpha:0.5];
...
[self setBackgroundColor:[UIColor whiteColor]];
...
}

//********************************************************************
(void)setNeedsBackground
{
if (!_enabled)
[self setBackgroundColor:[UIColor lightGrayColor]];
}