UILabel文本阴影不能是任何颜色而是灰色

Question

So I'm setting UILabel.shadowColor to a non-gray color, but the shadow always appears as opaque 50% gray (or so). For example, I tried setting the shadow to red and I still see gray. Has anyone else seen this? (This is the UILabel inside a custom nav bar back button)

Answer 1

I ran into this same problem while trying to add a non-gray drop shadow to a UIButton 's titleLabel . The solution appears to be to set the properties of the button's layer instead:

button.titleLabel.layer.shadowColor = [UIColor whiteColor].CGColor;
button.titleLabel.layer.shadowOffset = CGSizeMake(0, 1);
button.titleLabel.layer.shadowOpacity = 1;
button.titleLabel.layer.shadowRadius = 0;

shadowOpacity is necessary for the effect to appear at all, and shadowRadius has to be set explicitly since the default is 3.0 (very blurry).

This solution requires #import <QuartzCore/QuartzCore.h> .

Answer 2

你确定你没有将backgroundColor与shadowColor混淆吗？