我如何以编程方式创建 segue 以在视图控制器之间传递信息 - Swift

Question

我是 swift 的新人，我还没有找到关于这个的任何答案。我有一个游戏，其中有一个滑块和一个随机值，因此用户必须猜测滑块上的值。当用户猜测数字并按下 ok 按钮时，它会调用视图控制器。当他非常接近时，它会调用另一个视图控制器，最后如果他没有猜到，它会调用另一个视图控制器，然后用户重新启动。我的问题是，我如何以编程方式创建一个 segue，以便只需按 ok 即可将获得的积分和回合传递给每个视图控制器。这些视图控制器是在故事板中创建的，我通过代码调用它们

感谢您的帮助！

@IBAction func okButton(sender: AnyObject) {

    let diferencia = abs(targetValue - currentValue)
    var point = 100 - diferencia
    score += point

    func bonusPoints() {
    score += 100
    }
    if diferencia == 0 {

        let viewController3 = self.storyboard!.instantiateViewControllerWithIdentifier("GonPerfectViewController") as UIViewController
        presentViewController(viewController3, animated: true, completion: nil)
        point += 100
        newRound()
        updateLabel()
        bonusPoints()
            } else if diferencia < 4 {

            let viewController3 = self.storyboard!.instantiateViewControllerWithIdentifier("GonNiceTry1ViewController") as UIViewController
            presentViewController(viewController3, animated: true, completion: nil)
            point += 50
            newRound()
            updateLabel()

             } else {

        let viewController3 = self.storyboard!.instantiateViewControllerWithIdentifier("GonThirdViewController") as UIViewController
        presentViewController(viewController3, animated: true, completion: nil)

        startnewgame()
        updateLabel()

    }
}

Answer 1

不，您不能以编程方式创建 segue。

关于信息传递，只需实例化下一个视图控制器并传递信息即可。推送或呈现编程。

NSString * storyboardName = @"MainStoryboard_iPhone";
NSString * viewControllerID = @"ViewID";
UIStoryboard * storyboard = [UIStoryboard storyboardWithName:storyboardName bundle:nil];
MyViewController * controller = (MyViewController *)[storyboard instantiateViewControllerWithIdentifier:viewControllerID];
controller.infoDict = myDictToPass;
[self presentViewController:controller animated:YES completion:nil];

只需要为 swift 找到相同的代码...希望您能做到...

Answer 2

既然你说"Those view controllers are created in the storyboard"我相信你可以使用performSegueWithIdentifier和prepareForSegue:

在 okButton 方法之外声明变量。

    let targetValue = 10 // this is just to test the first case
    let currentValue = 10 // this is just to test the first case
    var score = 0
    var point = 0

@IBAction func okButton(sender: AnyObject) {

        let diferencia = abs(targetValue - currentValue)
        point = 100 - diferencia
        score += point
        func bonusPoints(){
            score += 100

        }
        if diferencia == 0{
            performSegueWithIdentifier("GonPerfectViewController", sender: nil)
            point += 100
            print(point)
            newRound()
            updateLabel()
            bonusPoints()
        }else if diferencia < 4{

            performSegueWithIdentifier("GonNiceTry1ViewController", sender: nil)

            point += 50
            newRound()
            updateLabel()

        }else{

            performSegueWithIdentifier("GonThirdViewController", sender: nil)


            startnewgame()
            updateLabel()

        }

}

那么你必须使用 prepareForSegue:

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {

    if segue.identifier == "GonPerfectViewController"{

        let vc = segue.destinationViewController as! GonPerfectViewController

        vc.point = point
    }
    if segue.identifier == "GonNiceTry1ViewController"{

        let vc = segue.destinationViewController as! GonNiceTry1ViewController

        vc.point = point
    }
    if segue.identifier == "GonThirdViewController"{

        let vc = segue.destinationViewController as! GonThirdViewController

        vc.point = point
    }


}

确保在每个 viewControllers 中设置 segue 标识符

当然你也必须在你的视图控制器中声明var point：

class GonPerfectViewController: UIViewController {

var point = 0

override func viewWillAppear(animated: Bool) {
    print(point)

}

}

您可以找到有关 segue 的更多信息 here

Answer 3

所以这应该等同于 Swift Nirav Gadhiya 的回答：

let storyboardName = "MainStoryboard_iPhone"
let viewControllerID = "ViewID"
let storyboard = UIStoryboard(name: storyboardName, bundle: nil)
let controller = ViewController().storyboard?.instantiateViewControllerWithIdentifier(viewControllerID)
controller.infoDict = myDictToPass
self.presentViewController(controller!, animated: true, completion: nil)

希望对您有所帮助:)

Answer 4

并且 Swift 3，基于 Linus G 的答案进行开发，这是对 Nirav Gadhiya 的答案的重写：

let storyboardName = "Main"
let viewControllerID = "id_of_viewcontroller_specified_by_you_in_storyboard"
let storyboard = UIStoryboard(name: storyboardName, bundle:nil)
let controller = storyboard.instantiateViewController(withIdentifier: viewControllerID)
controller.infoDict = myDictToPass
//If it is a modal view:
//controller.modalPresentationStyle = .overFullScreen
self.present(controller, animated: false, completion: nil)

我如何以编程方式创建 segue 以在视图控制器之间传递信息 - Swift

How can I create a segue programmatically to pass info between view controllers - Swift

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