blocks|key|141282|text|如果您的segue存在于故事板中，并且在两个视图之间有一个segue标识符，则可以使用以下命令以编程方式调用它：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|141283|performSegue(withIdentifier:+"mySegueID",+sender:+nil)|code-block|syntax|javascript|141284|对于较旧的版本：|141285|performSegueWithIdentifier("mySegueID",+sender:+nil)|141286|您还可以执行以下操作：|141287|presentViewController(nextViewController,+animated:+true,+completion:+nil)|141288|或者，如果您在导航控制器中：|141289|self.navigationController?.pushViewController(nextViewController,+animated:+true)|141290|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|W|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|Y|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|10|8|@]|9|@]|A|$]]|$1|Q|3|R|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|S|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|T|$]]

If your segue exists in the storyboard with a segue identifier between your two views, you can just call it programmatically using:

<pre><code>performSegue(withIdentifier: "mySegueID", sender: nil)
</code></pre>

For older versions:

<pre><code>performSegueWithIdentifier("mySegueID", sender: nil)
</code></pre>

You could also do:

<pre><code>presentViewController(nextViewController, animated: true, completion: nil)
</code></pre>

Or if you are in a Navigation controller:

<pre><code>self.navigationController?.pushViewController(nextViewController, animated: true)
</code></pre>

blocks|key|2930259|text|您可以像这样使用segue：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2930260|self.performSegueWithIdentifier("push",+sender:+self)
override+func+prepareForSegue(segue:+UIStoryboardSegue!,+sender:+AnyObject!)+{
++++if+segue.identifier+==+"push"+{

++++}
}|code-block|syntax|javascript|2930261|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You can use segue like this:

<pre><code>self.performSegueWithIdentifier("push", sender: self)
override func prepareForSegue(segue: UIStoryboardSegue!, sender: AnyObject!) {
 if segue.identifier == "push" {

 }
}
</code></pre>

blocks|key|144988|text|你想做什么对于单元测试来说是非常重要的。基本上，您需要在视图控制器中创建一个小的本地函数。函数可以任意命名，只需包含performSegueWithIndentifier即可。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|144989|func+localFunc()+{
++++println("we+asked+you+to+do+it")
++++performSegueWithIdentifier("doIt",+sender:+self)
}|code-block|syntax|javascript|144990|接下来，更改您的实用程序类FBManager，使其包含一个接受函数参数的初始化器和一个变量，用于保存执行分段的ViewController函数。|144991|public+class+UtilClass+{

++++var+yourFunction+:+()+->+()

++++init+(someFunction:+()+->+())+{
++++++++self.yourFunction+=+someFunction
++++++++println("initialized+UtilClass")
++++}

++++public+convenience+init()+{
++++++++func+dummyLog+()+->+()+{
++++++++++++println("no+action+passed")
++++++++}
++++++++self.init(dummyLog)
++++}

++++public+func+doThatThing()+->+()+{
++++++++//+the+facebook+login+function
++++++++println("now+execute+passed+function")
++++++++self.yourFunction()
++++++++println("did+that+thing")
++++}
}|144992|(方便的init允许您在单元测试中使用它，而无需执行segue。)|144993|最后，在你有//todo:+segue到下一个视图的地方？，把一些东西放在下面的线上：|144994|self.yourFunction()|144995|在单元测试中，您可以简单地调用它，如下所示：|144996|let+f+=+UtilClass()
f.doThatThing()|144997|其中doThatThing是您的fbsessionstatechange，UtilClass是FBManager。|144998|对于实际的代码，只需将localFunc+(无括号)传递给FBManager类。|144999|entityMap^0|1M|R|0|0|D|9|0|0|0|0|0|0|0|11|9|0|B|9|0^^$0|@$1|2|3|4|5|6|7|14|8|@$9|15|A|16|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|17|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|18|8|@$9|19|A|1A|B|C]]|D|@]|E|$]]|$1|M|3|N|5|H|7|1B|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|1C|8|@]|D|@]|E|$]]|$1|Q|3|R|5|6|7|1D|8|@]|D|@]|E|$]]|$1|S|3|T|5|H|7|1E|8|@]|D|@]|E|$I|J]]|$1|U|3|V|5|6|7|1F|8|@]|D|@]|E|$]]|$1|W|3|X|5|H|7|1G|8|@]|D|@]|E|$I|J]]|$1|Y|3|Z|5|6|7|1H|8|@$9|1I|A|1J|B|C]]|D|@]|E|$]]|$1|10|3|11|5|6|7|1K|8|@$9|1L|A|1M|B|C]]|D|@]|E|$]]|$1|12|3|-4|5|6|7|1N|8|@]|D|@]|E|$]]]|13|$]]

What you want to do is really important for unit testing. Basically you need to create a small local function in the view controller. Name the function anything, just include the <code>performSegueWithIndentifier</code>.

<pre><code>func localFunc() {
 println("we asked you to do it")
 performSegueWithIdentifier("doIt", sender: self)
}
</code></pre>

Next change your utility class <code>FBManager</code> to include an initializer that takes an argument of a function and a variable to hold the ViewController's function that performs the segue.

<pre><code>public class UtilClass {

 var yourFunction : () -&gt; ()

 init (someFunction: () -&gt; ()) {
 self.yourFunction = someFunction
 println("initialized UtilClass")
 }

 public convenience init() {
 func dummyLog () -&gt; () {
 println("no action passed")
 }
 self.init(dummyLog)
 }

 public func doThatThing() -&gt; () {
 // the facebook login function
 println("now execute passed function")
 self.yourFunction()
 println("did that thing")
 }
}
</code></pre>

(The convenience init allows you to use this in unit testing without executing the segue.)

Finally, where you have //todo: segue to the next view???, put something along the lines of:

<pre><code>self.yourFunction()
</code></pre>

In your unit tests, you can simply invoke it as:

<pre><code>let f = UtilClass()
f.doThatThing()
</code></pre>

where doThatThing is your fbsessionstatechange and <code>UtilClass</code> is FBManager.

For your actual code, just pass <code>localFunc</code> (no parenthesis) to the FBManager class.

blocks|key|141305|text|您可以使用NSNotification|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|141306|在您的自定义类中添加post方法：|141307|NSNotificationCenter.defaultCenter().postNotificationName("NotificationIdentifier",+object:+nil)|code-block|syntax|javascript|141308|在ViewController中添加观察者：|141309|NSNotificationCenter.defaultCenter().addObserver(self,+selector:+"methodOFReceivedNotication:",+name:"NotificationIdentifier",+object:+nil)|141310|在你的ViewController中添加函数：|141311|func+methodOFReceivedNotication(notification:+NSNotification){
++++self.performSegueWithIdentifier("yourIdentifierInStoryboard",+sender:+self)
}|141312|entityMap^0|5|E|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Z|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|10|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|11|8|@]|D|@]|E|$]]|$1|O|3|P|5|J|7|12|8|@]|D|@]|E|$K|L]]|$1|Q|3|R|5|6|7|13|8|@]|D|@]|E|$]]|$1|S|3|T|5|J|7|14|8|@]|D|@]|E|$K|L]]|$1|U|3|-4|5|6|7|15|8|@]|D|@]|E|$]]]|V|$]]

You can use NSNotification

Add a post method in your custom class:

<pre><code>NSNotificationCenter.defaultCenter().postNotificationName("NotificationIdentifier", object: nil)
</code></pre>

Add an observer in your ViewController:

<pre><code>NSNotificationCenter.defaultCenter().addObserver(self, selector: "methodOFReceivedNotication:", name:"NotificationIdentifier", object: nil)
</code></pre>

Add function in you ViewController:

<pre><code>func methodOFReceivedNotication(notification: NSNotification){
 self.performSegueWithIdentifier("yourIdentifierInStoryboard", sender: self)
}
</code></pre>

blocks|key|2930314|text|你可以使用performSegueWithIdentifier函数来做这件事。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2930315|​|2930316|📷|atomic|2930317|2930318|语法:|BOLD|2930319|func+performSegueWithIdentifier(identifier:+String,+sender:+AnyObject?)|code-block|syntax|javascript|2930320|示例:|2930321|+performSegueWithIdentifier("homeScreenVC",+sender:+nil)|2930322|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/7bb4d32bc4bd40505e44082b8e0fecbc.png|imageAlt^0|5|Q|0|0|0|1|0|0|0|0|3|0|0|0|3|0|0^^$0|@$1|2|3|4|5|6|7|16|8|@$9|17|A|18|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|19|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|1A|8|@]|D|@$9|1B|A|1C|1|1D]]|E|$]]|$1|K|3|G|5|6|7|1E|8|@]|D|@]|E|$]]|$1|L|3|M|5|6|7|1F|8|@$9|1G|A|1H|B|N]]|D|@]|E|$]]|$1|O|3|P|5|Q|7|1I|8|@]|D|@]|E|$R|S]]|$1|T|3|U|5|6|7|1J|8|@$9|1K|A|1L|B|N]]|D|@]|E|$]]|$1|V|3|W|5|Q|7|1M|8|@]|D|@]|E|$R|S]]|$1|X|3|-4|5|6|7|1N|8|@]|D|@]|E|$]]]|Y|$Z|$5|10|11|12|E|$13|14|15|-4]]]]

You can do this thing using <code>performSegueWithIdentifier</code> function.

<a href="https://i.stack.imgur.com/31nGG.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/31nGG.png" alt="Screenshot"></a>

Syntax :

<pre><code>func performSegueWithIdentifier(identifier: String, sender: AnyObject?)
</code></pre>

Example :

<pre><code> performSegueWithIdentifier("homeScreenVC", sender: nil)
</code></pre>

blocks|key|142623|text|Swift+3+-还可与SpriteKit配合使用|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|142624|您可以使用NSNotification.|142625|示例：|142626|1.)在故事板中创建一个segue，并将标识符命名为"segue“|142627|2.)在要从中进行序列化的ViewController中创建一个函数。|142628|func+goToDifferentView()+{

++++self.performSegue(withIdentifier:+"segue",+sender:+self)

}|code-block|syntax|javascript|142629|3.)在ViewController的ViewDidLoad()中，您从创建观察者开始。|142630|NotificationCenter.default.addObserver(self,+selector:+#selector(goToDifferentView),+name:+"segue"+as+NSNotification.Name,+object:+nil)|142631|更新-上一次我使用它时，我不得不将.addObserver调用更改为以下代码以使错误静默。|CODE|142632|NotificationCenter.default.addObserver(self,+selector:+#selector(goToDifferentView),+name:+NSNotification.Name(rawValue:+"segue"),+object:+nil)|142633|4.)在要连接到的ViewController或场景中，将Post方法添加到要触发分段的任何位置。|142634|NotificationCenter.default.post(name:+"segue"+as+NSNotification.Name,+object:+nil)|142635|更新-上一次我使用它时，我不得不将.post调用更改为以下代码以使错误静默。|142636|NotificationCenter.default.post(NSNotification(name:+NSNotification.Name(rawValue:+"segue"),+object:+nil)+as+Notification)|142637|entityMap^0|0|7|9|C|0|5|E|0|0|3|0|0|0|0|0|0|0|2|H|C|0|0|0|0|0|2|H|5|0|0^^$0|@$1|2|3|4|5|6|7|1B|8|@$9|1C|A|1D|B|C]|$9|1E|A|1F|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|1G|8|@$9|1H|A|1I|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|1J|8|@$9|1K|A|1L|B|C]]|D|@]|E|$]]|$1|J|3|K|5|6|7|1M|8|@]|D|@]|E|$]]|$1|L|3|M|5|6|7|1N|8|@]|D|@]|E|$]]|$1|N|3|O|5|P|7|1O|8|@]|D|@]|E|$Q|R]]|$1|S|3|T|5|6|7|1P|8|@]|D|@]|E|$]]|$1|U|3|V|5|P|7|1Q|8|@]|D|@]|E|$Q|R]]|$1|W|3|X|5|6|7|1R|8|@$9|1S|A|1T|B|C]|$9|1U|A|1V|B|Y]]|D|@]|E|$]]|$1|Z|3|10|5|P|7|1W|8|@]|D|@]|E|$Q|R]]|$1|11|3|12|5|6|7|1X|8|@]|D|@]|E|$]]|$1|13|3|14|5|P|7|1Y|8|@]|D|@]|E|$Q|R]]|$1|15|3|16|5|6|7|1Z|8|@$9|20|A|21|B|C]|$9|22|A|23|B|Y]]|D|@]|E|$]]|$1|17|3|18|5|P|7|24|8|@]|D|@]|E|$Q|R]]|$1|19|3|-4|5|6|7|25|8|@]|D|@]|E|$]]]|1A|$]]

Swift 3 - Also works with SpriteKit

You can use NSNotification. 

Example:

1.) Create a segue in the storyboard and name the identifier "segue"

2.) Create a function in the ViewController you are segueing from.

<pre><code>func goToDifferentView() {

 self.performSegue(withIdentifier: "segue", sender: self)

}
</code></pre>

3.) In the ViewDidLoad() of your ViewController you are segueing from create the observer.

<pre><code>NotificationCenter.default.addObserver(self, selector: #selector(goToDifferentView), name: "segue" as NSNotification.Name, object: nil)
</code></pre>

Update -
Last time I used this I had to change the <code>.addObserver</code> call to the following code to silence the errors.

<pre><code>NotificationCenter.default.addObserver(self, selector: #selector(goToDifferentView), name: NSNotification.Name(rawValue: "segue"), object: nil)
</code></pre>

4.) In the ViewController or Scene you are segueing to, add the Post Method wherever you want the segue to be triggered.

<pre><code>NotificationCenter.default.post(name: "segue" as NSNotification.Name, object: nil)
</code></pre>

Update -
Last time I used this I had to change the <code>.post</code> call to the following code to silence the errors.

<pre><code>NotificationCenter.default.post(NSNotification(name: NSNotification.Name(rawValue: "segue"), object: nil) as Notification)
</code></pre>

blocks|key|142639|text|这对我很有效。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|142640|首先，在身份检查器中为情节提要中的视图控制器提供一个情节提要ID。然后使用以下示例代码(确保类、情节提要名称和情节提要ID与您正在使用的内容相匹配)：|142641|let+viewController:
UIViewController+=+UIStoryboard(
++++name:+"Main",+bundle:+nil
).instantiateViewControllerWithIdentifier("ViewController")+as+UIViewController
//+.instantiatViewControllerWithIdentifier()+returns+AnyObject!
//+this+must+be+downcast+to+utilize+it

self.presentViewController(viewController,+animated:+false,+completion:+nil)|code-block|syntax|javascript|142642|有关更多详细信息，请参阅http://sketchytech.blogspot.com/2012/11/instantiate-view-controller-using.html最好的祝福|offset|length|142643|entityMap|0|LINK|mutability|MUTABLE|url|http://sketchytech.blogspot.com/2012/11/instantiate-view-controller-using.html^0|0|0|0|C|26|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|X|8|@]|9|@$K|Y|L|Z|1|10]]|A|$]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]]]

This worked for me. 

First of all give the view controller in your storyboard a Storyboard ID inside the identity inspector. Then use the following example code (ensuring the class, storyboard name and story board ID match those that you are using):

<pre><code>let viewController:
UIViewController = UIStoryboard(
 name: "Main", bundle: nil
).instantiateViewControllerWithIdentifier("ViewController") as UIViewController
// .instantiatViewControllerWithIdentifier() returns AnyObject!
// this must be downcast to utilize it

self.presentViewController(viewController, animated: false, completion: nil)
</code></pre>

For more details see <a href="http://sketchytech.blogspot.com/2012/11/instantiate-view-controller-using.html" rel="nofollow noreferrer">http://sketchytech.blogspot.com/2012/11/instantiate-view-controller-using.html</a>
best wishes

blocks|key|2717808|text|如果您的segue存在于故事板中，并且两个视图之间有一个segue标识符，那么您可以使用以下命令以编程方式调用它|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2717809|self.performSegueWithIdentifier("yourIdentifierInStoryboard",+sender:+self)|code-block|syntax|javascript|2717810|如果您在导航控制器中|2717811|let+viewController+=+YourViewController(nibName:+"YourViewController",+bundle:+nil)++++++++
self.navigationController?.pushViewController(viewController,+animated:+true)|2717812|我会推荐你使用导航控制器的第二种方法。|2717813|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

If your segue exists in the storyboard with a segue identifier between your two views, you can just call it programmatically using

<pre><code>self.performSegueWithIdentifier("yourIdentifierInStoryboard", sender: self)
</code></pre>

If you are in Navigation controller

<pre><code>let viewController = YourViewController(nibName: "YourViewController", bundle: nil) 
self.navigationController?.pushViewController(viewController, animated: true)
</code></pre>

I will recommend you for second approach using navigation controller.

blocks|key|2717911|text|另一种选择是使用模式段|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2717912|步骤1:转到故事板，并为视图控制器提供故事板ID。您可以在右侧的身份检查器中找到更改情节提要ID的位置。让我们将情节提要ID称为ModalViewController|offset|length|style|BOLD|CODE|2717913|步骤2:打开“发送者”视图控制器(让我们称之为ViewController)，并将以下代码添加到其中|2717914|public+class+ViewController+{
++override+func+viewDidLoad()+{
++++showModalView()
++}

++func+showModalView()+{
++++if+let+mvc+=+UIStoryboard(name:+"Main",+bundle:+nil).instantiateViewController(withIdentifier:+"ModalViewController")+as?+ModalViewController+{
++++++self.present(mvc,+animated:+true,+completion:+nil)
++++}
++}
}|code-block|syntax|javascript|2717915|请注意，我们要打开的View+Controller也称为ModalViewController|2717916|第3步：要关闭ModalViewController，请在其中添加以下内容|2717917|public+class+ModalViewController+{
+++@IBAction+func+closeThisViewController(_+sender:+Any?)+{
++++++self.presentingViewController?.dismiss(animated:+true,+completion:+nil)
+++}
}|2717918|entityMap^0|0|0|4|J|5|1S|J|0|0|4|N|E|0|0|S|J|0|0|4|0|0^^$0|@$1|2|3|4|5|6|7|X|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Y|8|@$D|Z|E|10|F|G]|$D|11|E|12|F|G]|$D|13|E|14|F|H]]|9|@]|A|$]]|$1|I|3|J|5|6|7|15|8|@$D|16|E|17|F|G]|$D|18|E|19|F|H]]|9|@]|A|$]]|$1|K|3|L|5|M|7|1A|8|@]|9|@]|A|$N|O]]|$1|P|3|Q|5|6|7|1B|8|@$D|1C|E|1D|F|H]]|9|@]|A|$]]|$1|R|3|S|5|6|7|1E|8|@$D|1F|E|1G|F|G]]|9|@]|A|$]]|$1|T|3|U|5|M|7|1H|8|@]|9|@]|A|$N|O]]|$1|V|3|-4|5|6|7|1I|8|@]|9|@]|A|$]]]|W|$]]

Another option is to use modal segue

STEP 1: Go to the storyboard, and give the View Controller a Storyboard ID. You can find where to change the storyboard ID in the Identity Inspector on the right. 
Lets call the storyboard ID <code>ModalViewController</code>

STEP 2: Open up the 'sender' view controller (let's call it <code>ViewController</code>) and add this code to it

<pre><code>public class ViewController {
 override func viewDidLoad() {
 showModalView()
 }

 func showModalView() {
 if let mvc = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "ModalViewController") as? ModalViewController {
 self.present(mvc, animated: true, completion: nil)
 }
 }
}
</code></pre>

Note that the View Controller we want to open is also called <code>ModalViewController</code>

STEP 3: To close ModalViewController, add this to it

<pre><code>public class ModalViewController {
 @IBAction func closeThisViewController(_ sender: Any?) {
 self.presentingViewController?.dismiss(animated: true, completion: nil)
 }
}
</code></pre>

blocks|key|2717923|text|这对我很有效：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2717924|//Button+method+example
+@IBAction+func+LogOutPressed(_+sender:+UIBarButtonItem)+{

++++++++do+{
++++++++++++try+Auth.auth().signOut()
++++++++++++navigationController?.popToRootViewController(animated:+true)

++++++++}+catch+let+signOutError+as+NSError+{
++++++++++print+("Error+signing+out:+%25@",+signOutError)
++++++++}


++++}|code-block|syntax|javascript|2717925|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This worked for me:

<pre><code>//Button method example
 @IBAction func LogOutPressed(_ sender: UIBarButtonItem) {

 do {
 try Auth.auth().signOut()
 navigationController?.popToRootViewController(animated: true)

 } catch let signOutError as NSError {
 print ("Error signing out: %@", signOutError)
 }


 }
</code></pre>

blocks|key|143811|text|上面已经有了很好的答案，在执行segue之前，我不想把重点放在准备上。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|143812|override+func+prepare(for+segue:+UIStoryboardSegue,+sender:+Any?)+{
++++++++if+segue.destination+is+YourDestinationVC+{
++++++++++++let+vc+=+segue.destination+as?+YourDestinationVC
++++++++++++//+"label"+and+"friends"+are+part+of+destinationVC
++++++++++++vc?.label+=+"someText"
++++++++++++vc?.friends+=+["John","Mike","Garry"]
++++++++}|code-block|syntax|javascript|143813|处理完要传递给destinationVC的数据后，请在适当的位置执行分段。您可以在StoryBoard身份检查器的StoryBoard+ID字段中设置“IdentifierOfDestinationVC|143814|performSegue(withIdentifier:+"IdentifierOfDestinationVC",+sender:+nil)|143815|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

There are already great answers above, i'd like to put little focus on preparation before performing segue.
<pre><code>override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
 if segue.destination is YourDestinationVC {
 let vc = segue.destination as? YourDestinationVC
 // &quot;label&quot; and &quot;friends&quot; are part of destinationVC
 vc?.label = &quot;someText&quot;
 vc?.friends = [&quot;John&quot;,&quot;Mike&quot;,&quot;Garry&quot;]
 }
</code></pre>
Once your are done with data that you want to pass on to your destinationVC then perform your segue at an appropriate place.
You can set &quot;IdentifierOfDestinationVC&quot; in StoryBoard Identity inspector in StoryBoard ID field
<pre><code>performSegue(withIdentifier: &quot;IdentifierOfDestinationVC&quot;, sender: nil)
</code></pre>

I'm creating an app that uses the Facebook SDK to authenticate users. I'm trying to consolidate the facebook logic in a separate class. Here is the code (stripped for simplicity):

<pre><code>import Foundation

class FBManager {
 class func fbSessionStateChane(fbSession:FBSession!, fbSessionState:FBSessionState, error:NSError?){
 //... handling all session states
 FBRequestConnection.startForMeWithCompletionHandler { (conn: FBRequestConnection!, result: AnyObject!, error: NSError!) -&gt; Void in

 println("Logged in user: \n\(result)");

 let storyboard = UIStoryboard(name: "Main", bundle: NSBundle.mainBundle())
 let loggedInView: UserViewController = storyboard.instantiateViewControllerWithIdentifier("loggedInView") as UserViewController

 loggedInView.result = result;

 //todo: segue to the next view???
 }
 }
}
</code></pre>

I'm using the above class method to check session state changes, and it works fine.

Q: Once I have the user's data, how can I segue to the next view from within this custom class?

EDIT: just to be clear, I have a segue with identifier on the storyboard, and I'm trying to find a way to perform a segue from a class which is not the view controller

IOS - How to segue programmatically using swift

身份验证

单元测试

Swift

我正在创建一个使用Facebook SDK对用户进行身份验证的应用程序。我正在尝试将facebook的逻辑整合到一个单独的类中。下面是代码(为简单起见进行了删减)：import Foundationclass FBManager {    class func fbSessionStateChane(fbSession...

问IOS -如何使用swift以编程方式进行分段
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