Switching Views Programmatically in Swift

问题:

I am trying to switch to the second view by pressing the "feeling lucky" button. When I try out my simulator and press it, it just goes to a black screen. How could I fix this?

@IBAction func FeelingLuckyPress(sender: UIButton) {

    let secondViewController:SecondViewController = SecondViewController()

    self.presentViewController(secondViewController, animated: true, completion: nil)
}

回答1:

You can add a segue between the two scenes in your storyboard by control dragging from the view controller icon at the top of the first scene to the second scene:

You can then select that segue and give it a unique storyboard identifier, and then you can just perform the segue using that identifier:

performSegueWithIdentifier("SegueToSecond", sender: self)

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Alternatively, you can do something like:

let controller = storyboard?.instantiateViewControllerWithIdentifier("Second") as SecondViewController
presentViewController(controller, animated: true, completion: nil)

where "Second" is a storyboard identifier I specified for that destination scene in Interface Builder.

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By the way, there are alternatives if you're creating your destination scene programmatically or using NIBs, but storyboards are more common, so I focused on that in my examples above.