swift - 在 swift 中用字符串中的其他字符替换多个字符的更简单方法是什么？

Question

我目前正在尝试设置一个字符串以添加到 HTTP POST 请求中，用户可以在其中键入文本并点击“enter”并发送请求。

我知道多个字符 (^,+,<,>) 可以替换为单个字符 ('_')，如下所示:

userText.replacingOccurrences(of: "[^+<>]", with: "_"

我目前正在使用以下的多项功能:

.replacingOccurrences(of: StringProtocol, with:StringProtocol)

像这样:

let addAddress = userText.replacingOccurrences(of: " ", with: "_").replacingOccurrences(of: ".", with: "%2E").replacingOccurrences(of: "-", with: "%2D").replacingOccurrences(of: "(", with: "%28").replacingOccurrences(of: ")", with: "%29").replacingOccurrences(of: ",", with: "%2C").replacingOccurrences(of: "&", with: "%26")

有没有更有效的方法？

Answer 1

您正在做的是使用百分比编码手动对字符串进行编码。

如果是这样，这将帮助您:

addingPercentEncoding(withAllowedCharacters:)

Returns a new string made from the receiver by replacing all characters not in the specified set with percent-encoded characters.

https://developer.apple.com/documentation/foundation/nsstring/1411946-addingpercentencoding

对于您的具体情况，这应该有效:

userText.addingPercentEncoding(withAllowedCharacters: .alphanumerics)