Swift如何在标签中的文本周围添加背景颜色? [英] Swift how to add background color just around text in a label?

问题描述

如何在兴趣变量内的每个变量周围添加背景色?文字周围没有空格.

How do you add a background color around each variable inside the interests variable? Just around text not the spaces.

var interests = "\(int01)     \(int02)     \(int03)     \(int04)     \(int05)     \(int06)"

我希望它看起来像这样:

I want it to look like this:

推荐答案

您可以使用正则表达式查找除空格以外的任何内容，使用while循环在字符串中查找其出现的位置，并使用这些范围更改的背景色属性字符串:

You can use a regex to find anything but white spaces, use a while loop to find its occurrences in a string and use those ranges to change the background color of an attributed string:

快捷键4

let mutable = NSMutableAttributedString(string: interests)
var startIndex = interests.startIndex
while let range = interests.range(of: "\\S+", options: .regularExpression, range: startIndex..<interests.endIndex) {
    mutable.addAttribute(.backgroundColor, value: UIColor.cyan, range: NSRange(range, in: interests))
    startIndex = range.upperBound
}
label.attributedText = mutable

注意:如果您想在文本周围添加空格，可以将正则表达式更改为" \\S+ "，并且不要忘记在原始兴趣字符串的开头和结尾添加空格.

Note: If you would like to add space around your text you can change your regex to " \\S+ " and don't forget to add spaces at the begin and at the end of your original interests string.

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