ios - 在 Swift 2 中使用 Parse 获取 Twitter 个人资料图片

Question

我正在尝试使用 swift 2 获取 Twitter 个人资料图片。

此链接描述了它是如何为 swift 完成的: Getting Twitter profile image with Parse in Swift

但问题是 NSURLConnection 现在已被弃用并被 NSURLSession 取代。 PFTwitterUtils.twitter()?.signRequest 需要一个 NSMutableURLRequest 但是从提到的替换同步请求的方法中我得到了一个 NSURLRequest。如何使代码工作？

我试图编写这段代码来让它工作，但被难住了:

     if PFTwitterUtils.isLinkedWithUser(PFUser.currentUser()!) {

        let screenName = PFTwitterUtils.twitter()?.screenName!


        let requestString = NSURL(string: "https://api.twitter.com/1.1/users/show.json?screen_name=" + screenName!)
        let request = NSURLRequest(URL: requestString!, cachePolicy: .ReloadIgnoringLocalAndRemoteCacheData, timeoutInterval: 5.0)


        PFTwitterUtils.twitter()?.signRequest(request)

        var response: NSURLResponse?
        var error: NSError?



        let session = NSURLSession.sharedSession()

        session.dataTaskWithRequest(request, completionHandler: {(data, response, error) in
            print(data)
            print(response)
            print(error)
        }).resume()



        if error == nil {

            let result = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.AllowFragments, error: &error)


            let names: String! = result?.objectForKey("name") as! String

            let separatedNames: [String] = names.componentsSeparatedByString(" ")

            //self.firstName = separatedNames.first!
            //self.lastName = separatedNames.last!


            let urlString = result?.objectForKey("profile_image_url_https") as! String

            let hiResUrlString = urlString.stringByReplacingOccurrencesOfString("_normal", withString: "", options: NSStringCompareOptions.LiteralSearch, range: nil)


            let twitterPhotoUrl = NSURL(string: hiResUrlString)
            let imageData = NSData(contentsOfURL: twitterPhotoUrl!)
            let twitterImage: UIImage! = UIImage(data:imageData!)
        }

NSURLConnection throws after updating to Swift 2.0

Answer 1

根据您的代码，我能够使用以下方法获取要检索的 Twitter 图片:

if PFTwitterUtils.isLinkedWithUser(PFUser.currentUser()!) {

    let screenName = PFTwitterUtils.twitter()?.screenName!
    let requestString = NSURL(string: "https://api.twitter.com/1.1/users/show.json?screen_name=" + screenName!)
    let request = NSMutableURLRequest(URL: requestString!, cachePolicy: .ReloadIgnoringLocalAndRemoteCacheData, timeoutInterval: 5.0)
    PFTwitterUtils.twitter()?.signRequest(request)
    let session = NSURLSession.sharedSession()

    session.dataTaskWithRequest(request, completionHandler: {(data, response, error) in
        print(data)
        print(response)
        print(error)

        if error == nil {
            var result: AnyObject?
            do {
                result = try NSJSONSerialization.JSONObjectWithData(data!, options: NSJSONReadingOptions.AllowFragments)
            } catch let error2 as NSError? {
                print("error 2 \(error2)")
            }

            let names: String! = result?.objectForKey("name") as! String
            let separatedNames: [String] = names.componentsSeparatedByString(" ")

            //self.firstName = separatedNames.first!
            //self.lastName = separatedNames.last!

            let urlString = result?.objectForKey("profile_image_url_https") as! String
            let hiResUrlString = urlString.stringByReplacingOccurrencesOfString("_normal", withString: "", options: NSStringCompareOptions.LiteralSearch, range: nil)
            let twitterPhotoUrl = NSURL(string: hiResUrlString)
            let imageData = NSData(contentsOfURL: twitterPhotoUrl!)
            let twitterImage: UIImage! = UIImage(data:imageData!)
        }
    }).resume()
}

我将结果处理整合到数据任务中，并修复了 Swift 2 的 JSONObjectWithData:options: 调用。