ios URL（字符串:)始终不起作用 [英] ios URL(string: ) not working always

问题描述

let testurl = "http://akns-
images.eonline.com/eol_images/Entire_Site/2018029/rs_1024x759-
180129200032-1024.lupita-nyongo-angela-bassett-black-panther-
premiere.ct.012918.jpg?fit=inside|900:auto"

if let url = URL(string: testurl){
    print("valid")
}else {
   print("invalid")
}

这会打印为无效的网址。但是在Web浏览器中显示图像。我已经看到很多方法，但是它会抛出Apple警告，使用 stringByAddingPercentEncodingWithAllowedCharacters ，这不会一直有效。

This prints as an invalid URL. But shows the image in web browser. I have seen lot of methods but it throws Apple warning to use stringByAddingPercentEncodingWithAllowedCharacters and this doesn't work always.

我更喜欢一个解决方案来清理网址而不编码完整的urlstring。在初始步骤对其进行编码可能是一个摩擦，当传递到外部库时，将重新编码url并使其无效。

I would prefer a solution to clean-up the url without encoding the complete urlstring. Encoding it at initial step can be a friction when passing to external libraries which will re-encode the url and make it invalid.

推荐答案

我想我找到了答案。仍将检查是否有任何副作用，欢迎提出意见：

I think I have found my answer. Still will be checking for any side effects, comments are welcome:

let urlst = "http://akns-
images.eonline.com/eol_images/Entire_Site/2018029/rs_1024x759-
180129200032-1024.lupita-nyongo-angela-bassett-black-panther-
premiere.ct.012918.jpg?fit=inside|900:auto"
extension String {
 func getCleanedURL() -> URL? {
    guard self.isEmpty == false else {
        return nil
    }
    if let url = URL(string: self) {
        return url
    } else {
        if let urlEscapedString = self.addingPercentEncoding(withAllowedCharacters: CharacterSet.urlQueryAllowed) , let escapedURL = URL(string: urlEscapedString){
            return escapedURL
        }
    }
    return nil
 }
}

这不会对完整的URL进行编码但只编码无效的查询字符（例如url中的'|'）。因此，它仍然可以作为字符串或有效URL传递。

This does not encode the complete URL but encodes only the invalid query characters (in eg url its '|'). Thus it can still be passed around as a string or a valid URL.

这篇关于ios URL（字符串:)始终不起作用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！