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nsmutableAttributedString文本颜色工作不正常

ios11 swift4 swift iphone ios

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cdub · 技术社区 · 7 年前

我有以下SWIFT 4.1代码:

    let timeduration = NSMutableAttributedString.init(string: "a dynamic string of time");

    timeduration.addAttribute(kCTFontAttributeName as NSAttributedStringKey, value: UIFont.systemFont(ofSize: 16), range: NSRange(location: 0, length: timeduration.length));
    timeduration.addAttribute(kCTForegroundColorAttributeName as NSAttributedStringKey, value: UIColor(red: 200/255, green: 200/255, blue: 200/255, alpha: 1.0), range: NSRange(location: 0, length: timeduration.length));
    timeduration.addAttribute(kCTFontAttributeName as NSAttributedStringKey, value: UIFont.systemFont(ofSize: 50), range: NSRange(location: 0, length: timecount));
    timeduration.addAttribute(kCTFontAttributeName as NSAttributedStringKey, value: UIFont.systemFont(ofSize: 25), range: NSRange(location: timecount, length: 2));

我使用的是Swift3,并使用Xcode的工具迁移到Swift4.1,但前景颜色似乎不起作用。xcode工具“fix”添加了kct代码。不过,字体名称和大小似乎起作用。

3 回复 | 直到 7 年前

1

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Pang Ajmal PraveeN 7 年前

这是解决你问题的方法。在swift 4.0及更高版本中,有一个名为nsattributedStringKey的结构,它定义字符串属性的键。

let timeduration = NSMutableAttributedString.init(string: "a dynamic string of time")

timeduration.addAttribute(NSAttributedStringKey.font, value: UIFont.systemFont(ofSize: 16), range: NSRange(location: 0, length: timeduration.length))

timeduration.addAttribute(NSAttributedStringKey.foregroundColor, value: 

UIColor(red: 200/255, green: 200/255, blue: 200/255, alpha: 1.0), range: 
NSRange(location: 0, length: timeduration.length))

timeduration.addAttribute(NSAttributedStringKey.font, value: UIFont.systemFont(ofSize: 50), range: NSRange(location: 0, length: timecount))

timeduration.addAttribute(NSAttributedStringKey.font, value: UIFont.systemFont(ofSize: 25), range: NSRange(location: timecount, length: 2))

2

0

BinaryGuy 7 年前

修理工给了你错误的钥匙。你想用这样的东西来代替:

timeduration.addAttribute(NSAttributedStringKey.foregroundColor, value: UIColor.red, range: NSRange(location: 0, length: timeduration.length))

其他人也一样。

您使用的键用于较低级别的核心文本内容。

3

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user9483522 7 年前

你可以这样做,我希望问题能得到解决:

let label = UILabel()
let labelText = "String Text"

let strokeTextAttributes = [
     NSAttributedStringKey.strokeColor : UIColor.black,
     NSAttributedStringKey.foregroundColor : UIColor.white,
     NSAttributedStringKey.strokeWidth : -2.0,
     NSAttributedStringKey.font : UIFont.boldSystemFont(ofSize: 18)
   ] as [NSAttributedStringKey : Any]

label.attributedText = NSAttributedString(string: labelText, attributes: strokeTextAttributes)