A modified take on the iMessage/Contacts App style of putting initials in a circle. This one uses UIVibrancyEffect and UIBlurEffect instead of a custom drawRect.
This ONLY works on multicolored backgrounds.
CNBlurredAbbreviatedLabel *label = [[CNBlurredAbbreviatedLabel alloc] initWithFrame: frame];
// Optional properties
// label.color = [UIColor blueColor];
// label.colorAlpha = 0.5;
// label.labelRadiusFactor = 2.01;
[view addSubView: label];
Alternatively, simply drop a UIView into a storyboard VC and set it's class in the Identity inspector to CNBlurredAbbreviatedLabel.
Setting property labelRadiusFactor which is the the base View's layer.cornerRadius property to 2.0, which calculates the bounds.size.width/2.0, causes UIBlurEffect to not function properly. Why?
ANSWER: Because the docs for UIVisualEffectView clearly state that changing the alpha of the same will result in undefined behaviour. Removing the call to
blurView.backgroundColor = [self.color colorWithAlphaComponent:self.colorAlpha];
fixes the issue even when labelRadiusFactor is 2.0. To get the desired effect, change the backgroundColor property of the contentView.