Question

我一直致力于通过菜单访问不同级别的游戏。级别为3D并使用SceneKit，菜单为2D并使用SpriteKit。

游戏从1级开始，这是一个UiViewController，当你击败它时，会出现菜单。如果您在菜单中按下一个按钮（表示“级别1”），您将被定向回到1级，但由于某种原因，在iPhone上再次加载1级时，它会崩溃，但模拟器工作正常。 / p>

我这里有一个简单的示例代码，它几乎完全相同，只在设备上崩溃：

import UIKit
import QuartzCore
import SceneKit

class GameViewController: UIViewController {


func ajrj() {
presentViewController(GameViewController(), animated: true, completion: nil)
}


override func viewDidLoad() {
    super.viewDidLoad()
    self.view = SCNView()
    var jarrarar = NSTimer.scheduledTimerWithTimeInterval(2, target: self, selector: #selector(GameViewController.ajrj), userInfo: nil, repeats: true)
    // create a new scene
    let scene = SCNScene(named: "art.scnassets/ship.scn")!

    // create and add a camera to the scene
    let cameraNode = SCNNode()
    cameraNode.camera = SCNCamera()
    scene.rootNode.addChildNode(cameraNode)

    // place the camera
    cameraNode.position = SCNVector3(x: 0, y: 0, z: 15)

    // create and add a light to the scene
    let lightNode = SCNNode()
    lightNode.light = SCNLight()
    lightNode.light!.type = SCNLightTypeOmni
    lightNode.position = SCNVector3(x: 0, y: 10, z: 10)
    scene.rootNode.addChildNode(lightNode)

    // create and add an ambient light to the scene
    let ambientLightNode = SCNNode()
    ambientLightNode.light = SCNLight()
    ambientLightNode.light!.type = SCNLightTypeAmbient
    ambientLightNode.light!.color = UIColor.darkGrayColor()
    scene.rootNode.addChildNode(ambientLightNode)

    // retrieve the ship node
    let ship = scene.rootNode.childNodeWithName("ship", recursively: true)!

    // animate the 3d object
    ship.runAction(SCNAction.repeatActionForever(SCNAction.rotateByX(0, y: 2, z: 0, duration: 1)))

    // retrieve the SCNView
    let scnView = self.view as! SCNView

    // set the scene to the view
    scnView.scene = scene

    // allows the user to manipulate the camera
    scnView.allowsCameraControl = true

    // show statistics such as fps and timing information
    scnView.showsStatistics = true

    // configure the view
    scnView.backgroundColor = UIColor.blackColor()

    // add a tap gesture recognizer
    let tapGesture = UITapGestureRecognizer(target: self, action: #selector(handleTap(_:)))
    scnView.addGestureRecognizer(tapGesture)
}

func handleTap(gestureRecognize: UIGestureRecognizer) {
    // retrieve the SCNView
    let scnView = self.view as! SCNView

    // check what nodes are tapped
    let p = gestureRecognize.locationInView(scnView)
    let hitResults = scnView.hitTest(p, options: nil)
    // check that we clicked on at least one object
    if hitResults.count > 0 {
        // retrieved the first clicked object
        let result: AnyObject! = hitResults[0]

        // get its material
        let material = result.node!.geometry!.firstMaterial!

        // highlight it
        SCNTransaction.begin()
        SCNTransaction.setAnimationDuration(0.5)

        // on completion - unhighlight
        SCNTransaction.setCompletionBlock {
            SCNTransaction.begin()
            SCNTransaction.setAnimationDuration(0.5)

            material.emission.contents = UIColor.blackColor()

            SCNTransaction.commit()
        }

        material.emission.contents = UIColor.redColor()

        SCNTransaction.commit()
    }
}

override func shouldAutorotate() -> Bool {
    return true
}

override func prefersStatusBarHidden() -> Bool {
    return true
}

override func supportedInterfaceOrientations() -> UIInterfaceOrientationMask {
    if UIDevice.currentDevice().userInterfaceIdiom == .Phone {
        return .AllButUpsideDown
    } else {
        return .All
    }
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Release any cached data, images, etc that aren't in use.
}

}

这是一个错误吗？我应该相信模拟器吗？这是一种呈现视图控制器的坏方法吗？为什么它会在设备上崩溃？

Answer 1

UIViewController没有没有参数的初始化程序。你应该使用这个：

public init(nibName nibNameOrNil: String?, bundle nibBundleOrNil: NSBundle?)

并为其提供xib文件的名称。模拟器可以处理这种情况 - 它猜测xib，但设备没有。

Answer 2

这闻起来像是一个内存泄漏给我，因为它随着程序的运行而逐渐变慢。看起来每次呈现时都会实例化场景/视图。

计时器具有对场景的字符串引用。它似乎在前一个VC上触发presentViewController（）。每次通过（每2秒？为什么？），你将消耗另一个VC和场景。

我不知道堆栈弹出的位置。

泄漏仪器显示什么？

模拟器工作但再次呈现UiViewController时设备崩溃

2 个答案: