类似于PHP的字符串解析 [英] PHP-like string parsing

问题描述

我正在编写各种微型控制台，并且试图弄清楚如何从链接中提取内容.例如，在PHP中，这是一个请求变量 所以:

I'm writing a mini-console of sorts and I'm trying to figure out how to extract things from a link. For example, in PHP this is a request variable so:

http://somelink.com/somephp.php?variable1=10&variable2=20

然后PHP找出url参数并将其分配给变量.

Then PHP figures out the url parameters and assigns them to a variable.

我该如何在Swift中解析这样的内容?

因此，给定我要使用的字符串:variable1 = 10和variable2 = 20等，有没有简单的方法可以做到这一点?我尝试使用Google搜索功能，但实际上并不知道我要搜索的内容.

So, given the string I'd want to take: variable1=10 and variable2=20 etc, is there a simple way to do this? I tried googling around but didn't really know what I was searching for.

我有一种非常骇人听闻的方法，但这并不是可扩展的.

I have a really horrible hacky way of doing this but it's not really extendable.

推荐答案

您需要

为查询项添加subscript运算符可能会有所帮助:

You might find it helpful to add a subscript operator for the query items:

extension NSURLComponents {
    subscript(queryItemName: String) -> String? {
        // of course, if you do this a lot, 
        // cache it in a dictionary instead
        for item in self.queryItems ?? [] {
            if item.name == queryItemName {
                return item.value
            }
        }
        return nil
    }
}

if let components = NSURLComponents(string: urlStr) {
    components["variable1"] ?? "No value"
}

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