Question

我正在使用被动ui并且我遇到了问题，主要是在我的登录方法中我想显示进度对话框，尝试登录然后关闭对话框并返回最终结果。

问题的基本伪代码是：

class GameViewController: UIViewController, ADBannerViewDelegate,
        ADInterstitialAdDelegate, SKProductsRequestDelegate,
    SKPaymentTransactionObserver, ChartboostDelegate, FBAdViewDelegate {

    var productID: NSString!
    let defaults = NSUserDefaults.standardUserDefaults()

    override func viewDidLoad() {
        super.viewDidLoad()
        if let scene = GameScene.unarchiveFromFile("GameScene") as? GameScene {
            // Configure the view.
            let skView = self.view as! SKView
            skView.showsFPS = false
            skView.showsNodeCount = false
            skView.multipleTouchEnabled = true

            /* Sprite Kit applies additional optimizations to improve rendering performance */
            skView.ignoresSiblingOrder = true

            /* Set the scale mode to scale to fit the window */
            scene.scaleMode = SKSceneScaleMode.AspectFill
            //scene.size = skView.bounds.size
            skView.presentScene(scene)
            loadFbAds()
        }

        func loadFbAds() {
            if defaults.boolForKey("removeAdsPurchased") == false {
                let width = self.view.frame.size.width
                let height = self.view.frame.size.height / 10

                let adView: FBAdView = FBAdView(placementID:"placement_id", adSize:kFBAdSize320x50, rootViewController:self)
                adView.frame = CGRect(x: 0, y: self.view.frame.size.height - 50, width: width, height: height)
                self.view.addSubview(adView)

                adView.delegate = self
                FBAdSettings.addTestDevice("testdevice")
                adView.loadAd()

                println("worksssssssssfsdfsdfsdfsdf")
            }
        }

        func adView(adView: FBAdView!, didFailWithError error: NSError!) {
            adBannerView = ADBannerView(frame: CGRect.zeroRect)
            adBannerView.center = CGPoint(x: adBannerView.center.x, y: view.bounds.size.height - adBannerView.frame.size.height / 2)
            adBannerView.delegate = self
            adBannerView.hidden = false
            view.addSubview(adBannerView)

            adView.hidden = true
        }
}

private IObservable<bool> AttemptLogin(CredentialPair pair) { return Dialogs.ShowProgress("logging in", "doing stuff...") .SelectMany(progressController => DoTheActualLogin(pair)) .Subscribe(boolForWhetherLoginSucceeded => { }); }会返回ShowProgress
IObservable<ProgressController>会返回DoTheActualLogIn

问题是在执行登录后，我需要针对进度控制器调用close方法。

我似乎找不到让控制器进一步顺序的方法。

我确定有一个组合器用于我缺失的序列/用于做类似事情的技术。

Answer 1

我认为这就是你所追求的：

(from progressController in Dialogs.ShowProgress("logging in", "doing stuff...")
 from result in DoTheActualLogin(pair)
 select new { result, progressController  })
 .Subscribe(anon => {...}, ex => {...})

Answer 2

Chris的答案很好，特别是如果你必须在链的下游使用progressController。如果你只需要在登录后进行清理，你可以这样做：

{% if wholesaler == 'True' -%}
    <!-- CONTENT TO SHOW TO MEMBER OF THIS SECURE ZONE -->
{% elsif customer == 'True' -%}
    <!-- CONTENT TO SHOW TO MEMBER OF THIS SECURE ZONE -->
{% else -%}
    <!-- CONTENT TO SHOW TO EVERYONE ELSE -->
{% endif -%}

通过可观察序列的线程参数

2 个答案: