调用 https://itunes.apple.com/lookup?id 正在缓存 json

Question

我在向https://itunes.apple.com/lookup?id=APPID 发出请求时遇到了一个非常奇怪的问题

如果我在浏览器中尝试此 url，它会为我提供应用程序的当前版本。但如果我从 iOS 应用程序调用它，它会给我旧的。

这是我正在使用的代码

let stringUrl : String = "https://itunes.apple.com/lookup?id=APPID"

    let req : NSMutableURLRequest = NSMutableURLRequest(url: URL(string: stringUrl)!, cachePolicy: NSURLRequest.CachePolicy.reloadIgnoringCacheData, timeoutInterval: 10.0)
    req.httpMethod = "get"

    let manager = AFHTTPRequestOperationManager()
    manager.responseSerializer = AFJSONResponseSerializer()

    let r = manager.httpRequestOperation(with: req as URLRequest!,
        success: { (operation: AFHTTPRequestOperation?,responseObject: Any?) in
            if let responseDic :Dictionary<String, AnyObject> = responseObject as? Dictionary<String, AnyObject> {

                let currentVersion: String = Bundle.main.object(forInfoDictionaryKey: "CFBundleShortVersionString") as! String

                let results = responseDic.first?.value as! Array<AnyObject>

                let dic =  results.first as! Dictionary<String,AnyObject>
                let version : String = dic["version"] as! String
                //let version : String = responseDic.object(forKey: "results")?[0].object(forKey: "version") as! String

                self.isUpToDate = currentVersion == version

                delegate.onVersionReceived(version)
            }
        },
        failure: { (operation: AFHTTPRequestOperation?,error: Error?) in

    })
    r.start()

知道发生了什么吗？

Answer 1

Pablo Martinez wrote in a comment:

我认为是缓存。我在 url 中添加了一个随机参数，它解决了我的问题。

这也解决了我的问题。其他人绝对应该先尝试一下。