ios - Swift 4 转换错误 - 类型 'NSAttributedStringKey' 没有成员 'foregroundColorNSAttributedStringKey'

Question

我将我的代码从 Swift 3 转换为 Swift 4 但出现此错误:

Type 'NSAttributedStringKey' has no member 'foregroundColorNSAttributedStringKey'

我的代码是:

let labelText = NSMutableAttributedString(string: (self.productDetailsInfo?.productAttributes?[indexPath.row].Name as String?)!)
labelText.append(NSAttributedString(string:"*"))
let selectedRange = NSMakeRange(labelText.length - 1, 1);
labelText.addAttribute(NSAttributedStringKey.foregroundColorNSAttributedStringKey.foregroundColor, value: UIColor.red, range: selectedRange)
labelText.addAttribute(NSAttributedStringKey.baselineOffset, value: 2, range: selectedRange)

Answer 1

替换行

  labelText.addAttribute(NSAttributedStringKey.foregroundColorNSAttributedStringKey.foregroundColor, value: UIColor.red, range: selectedRange)

与

  labelText.addAttribute(NSAttributedStringKey.foregroundColor, value: UIColor.red, range: selectedRange)

您还可以使用addAttributes 方法一次为一个范围设置多个属性

  labelText.addAttributes([NSAttributedStringKey.foregroundColor:UIColor.red,NSAttributedStringKey.backgroundColor:UIColor.blue], range: selectedRange)