编码url swift withAllowedCharacters不工作 编码%20为%2520 (意味着编码%为%25)

Question

以下是我的URL编码代码

extension String {
var encoded: String {
    return self.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed) ?? ""
  }
}

但我面临的问题是，如果url中包含%20，它被编码为%2520，尽管我已经添加了 urlQueryAllowed

原文网址：/mydomain.inretailers_data_v2retailer32017372-Tea%20Coffee%20Vending%20Machine.JPG https:/mydomain.inretailers_data_v2retailer32017372-Tea%20Coffee%20Vending%20Machine.JPG

编码的网址。https:/mydomain.inretailers_data_v2retailer32017372-Tea%2520Coffee%2520Vending%2520Machine.JPG。

Answer 1

如果你有一个已经编码的URL字符串，你首先需要删除百分比编码，然后再重新应用。

如果你不确定你的URL是否已经编码，你可以简单地使用一个 if let 关于 removingPercentEncoding 并根据其结果，要么调用 addingPercentEncoding 在原始的URL上或在您删除编码的URL上。

let alreadyEncodedURLString = "https://mydomain.in/retailers_data_v2/retailer/320/17372-Tea%20Coffee%20Vending%20Machine.JPG"
if let unencodedURLString = alreadyEncodedURLString.removingPercentEncoding {
    unencodedURLString.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)
} else {
    alreadyEncodedURLString.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)
}