在UIAlertAction中添加prepareForSegue

Question

我想在按下警报视图中的"Next“按钮时将一个数组传递给另一个ViewController。

userInformation += [userName, userGender, String(userAge), String(userHeight), String(userWeight)]

let alert = UIAlertController(title:"Confirmation", message: confirmationMessage, preferredStyle: UIAlertControllerStyle.Alert)

let confirmBtn : UIAlertAction = UIAlertAction(title: "Next", style: UIAlertActionStyle.Default, handler: {(action:UIAlertAction!)-> Void in

    let vc = (self.storyboard?.instantiateViewControllerWithIdentifier("toPerInfo"))! as UIViewController

    print(self.userInformation)

    self.showDetailViewController(vc, sender: self)

})

let cancelBtn : UIAlertAction = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Cancel, handler: nil)

    alert.addAction(cancelBtn)
    alert.addAction(confirmBtn)

    self.presentViewController(alert, animated: true, completion: nil)

这是perpareForSegue

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        var destViewController: PersonalInformation = segue.destinationViewController as! PersonalInformation
        var arrayToSegue: [String] = self.userInformation
        destViewController.useInfo = arrayToSegue
    }

我想将perpareForSegue放入“下一步”按钮。我应该如何修改我的代码..我找不到其他类似的问题...

Answer 1

正如在UIViewController documentation中所写的，prepareForSegue方法实际上是用来定制数据或将数据传递给新的视图控制器的：

此方法的默认实现不执行任何操作。子类覆盖此方法，并在显示新的视图控制器之前使用它配置新的视图控制器。segue对象包含有关转换的信息，包括对所涉及的两个视图控制器的引用。

如果您确实需要，可以手动推送PersonalInformation视图控制器：

let storyboard = UIStoryboard(name: "StoryboardName", bundle: nil)
let destVC = storyboard.instantiateViewControllerWithIdentifier("PersonalInformationId") as! PersonalInformation
var arrayToSegue: [String] = self.userInformation
destVC = arrayToSegue

// present or push, as you wish 
presentViewController(destVC, animated: true, completion: nil)