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I set shadow on NSMutableAttributedString, it works on other version of iOS but not iOS 13, the next is my code

let shadow = NSShadow.init()
            shadow.shadowColor = UIColor.red
            shadow.shadowBlurRadius = 20
            
            attr.addAttribute(NSAttributedString.Key.shadow, value: shadow, range: NSRange.init(location: 0, length: (text as NSString).length))

It works well on UILabel attributedText，but not works well on CATextLayer string On iOS13

danfei91
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  • For shadows use the CALayer `.layer` property of the label (or other view). There are properties on it that you can set to make a shadow. – Fogmeister Jul 27 '22 at 06:46

1 Answers1

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iOS 14 or later

let shadow = NSShadow.init()
shadow.shadowColor = UIColor.red
shadow.shadowBlurRadius = 20
attr.addAttribute(NSAttributedString.Key.shadow, value: shadow, range: NSRange.init(location: 0, length: (text as NSString).length))
subLayer.string = attr

ios 13 or earlier

let shadow = NSShadow.init()
shadow.shadowColor = UIColor.red
shadow.shadowBlurRadius = 20
attr.addAttribute(NSAttributedString.Key.shadow, value: shadow, range: NSRange.init(location: 0, length: (text as NSString).length))

subLayer.shadowRadius = 20
subLayer.shadowColor = UIColor.red.cgColor
subLayer.shadowOpacity = 1
subLayer.string = attr
danfei91
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  • 5