如何在 swift %@ 中更改部分动态字符串的颜色？

Question

I am using the following placeholder in my string: %@

For instance my string is String(format: "greetings %@", str)

How can I provide a specific color for this dynamic placeholder?

Answer 1

You can modify the attributes for a NSRange within an attributed string. But rather than build it with a format string and retroactively going back and updating the attributes for a NSRange , I'd just create an attributed string for the string to be appended, setting its attributes before you append it:

let name = NSAttributedString(string: str, attributes: [.foregroundColor: UIColor.green])

let greeting = NSMutableAttributedString(string: "greetings ")
greeting.append(name)

label.attributedText = greeting

That yields: