IOS - 如何使用swift以编程方式进行segue [英] IOS - How to segue programmatically using swift
问题描述
我正在创建一个使用 Facebook SDK 来验证用户身份的应用.我正在尝试将 facebook 逻辑合并到一个单独的类中.这是代码(为简单起见已删除):
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):
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!) -> Void in
println("Logged in user:
(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???
}
}
}
我正在使用上面的类方法来检查会话状态的变化,它工作正常.
I'm using the above class method to check session state changes, and it works fine.
问:获得用户数据后,如何从该自定义类中转到下一个视图?
Q: Once I have the user's data, how can I segue to the next view from within this custom class?
为了清楚起见,我在情节提要上有一个带有标识符的转场,我正在尝试找到一种方法来从不是视图控制器的类中执行转场
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
推荐答案
如果你的 segue 存在于故事板中,并且你的两个视图之间有一个 segue 标识符,你可以使用以下方法以编程方式调用它:
If your segue exists in the storyboard with a segue identifier between your two views, you can just call it programmatically using:
performSegue(withIdentifier: "mySegueID", sender: nil)
对于旧版本:
performSegueWithIdentifier("mySegueID", sender: nil)
你也可以这样做:
presentViewController(nextViewController, animated: true, completion: nil)
或者如果您在导航控制器中:
Or if you are in a Navigation controller:
self.navigationController?.pushViewController(nextViewController, animated: true)
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