如何在Swift中使用包含相同键的多个值的查询参数构建URL? [英] How can I build a URL with query parameters containing multiple values for the same key in Swift?

问题描述

我正在iOS应用程序中使用AFNetworking，并且对于它发出的所有GET请求，我都会从基本URL构建URL，然后使用NSDictionary键值对添加参数.

I am using AFNetworking in my iOS app and for all the GET requests it makes, I build the url from a base URL and than add parameters using NSDictionary Key-Value pairs.

问题是我需要为不同的值使用相同的键.

The problem is that I need same key for different values.

以下是我需要最终URL看起来像的一个示例-

Here is an example of what I need the finally URL to look like -

http://example.com/. ....& id = 21212& id = 21212& id = 33232

在NSDictionary中，不可能在相同的键中具有不同的值.所以我尝试了NSSet但没有用.

It's not possible in NSDictionary to have different values in same keys. So I tried NSSet but did not work.

let productIDSet: Set = [prodIDArray]
let paramDict = NSMutableDictionary()
paramDict.setObject(productIDSet, forKey: "id")

推荐答案

您需要的只是URLComponents(或Obj-C中的NSURLComponents).基本思想是为您的ID创建一堆查询项.您可以将以下代码粘贴到运动场中:

All you need is URLComponents (or NSURLComponents in Obj-C). The basic idea is to create a bunch of query items for your id's. Here's code you can paste into a playground:

import Foundation
import XCPlayground

let queryItems = [URLQueryItem(name: "id", value: "1"), URLQueryItem(name: "id", value: "2")]
var urlComps = URLComponents(string: "www.apple.com/help")!
urlComps.queryItems = queryItems
let result = urlComps.url!
print(result)

您应该会看到

www.apple.com/help?id=1&id=2

www.apple.com/help?id=1&id=2

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