如何从GameScene中的ViewController调用方法 [英] How to call method from ViewController in GameScene

问题描述

我的viewController中有一个自定义segue的方法，如下所示：

I have a method that has a custom segue in my viewController that looks like this:

func gameOver() {
    performSegueWithIdentifier("GameOver", sender: nil)
}

我打电话给GameScene.swift中的方法如下：

I call the method like so in GameScene.swift:

 GameViewController().gameOver()

我仔细检查了segue名称，这是正确的。每当我在GameScene.swift文件中调用它时，我都会收到SIGABRT消息，但我不知道为什么。我尝试只用println（）消息调用该函数，它工作。

I double checked the segue name and it is correct. Whenever I call this in my GameScene.swift file I get the SIGABRT message and I don't know why. I tried calling the function with only a println() message and it worked.

对于为什么会发生这种情况以及如何在GameScene.swift文件中成功调用该方法的任何建议都将不胜感激。

Any advice on why this is occurring and how I can successfully call the method in the GameScene.swift file would be greatly appreciated.

谢谢！

PS这是崩溃日志：

2015-01-28 21:59:46.181 RunawaySquare[95616:3907041] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Receiver (<RunawaySquare.GameViewController: 0x7fe4305c7890>) has no segue with identifier 'GameEnd''
*** First throw call stack:
(
    0   CoreFoundation                      0x000000010d461f35 __exceptionPreprocess + 165
    1   libobjc.A.dylib                     0x000000010f39ebb7 objc_exception_throw + 45
    2   UIKit                               0x000000010e20dd3b -[UIViewController shouldPerformSegueWithIdentifier:sender:] + 0
    3   RunawaySquare                       0x000000010d2683b2 _TFC13RunawaySquare18GameViewController8gameOverfS0_FT_T_ + 914
    4   RunawaySquare                       0x000000010d261af0 _TFC13RunawaySquare9GameScene12touchesBeganfS0_FTCSo5NSSet9withEventCSo7UIEvent_T_ + 1808
    5   RunawaySquare                       0x000000010d261c3f _TToFC13RunawaySquare9GameScene12touchesBeganfS0_FTCSo5NSSet9withEventCSo7UIEvent_T_ + 79
    6   SpriteKit                           0x000000010df4d7e1 -[SKView touchesBegan:withEvent:] + 946
    7   UIKit                               0x000000010e12d16e -[UIWindow _sendTouchesForEvent:] + 325
    8   UIKit                               0x000000010e12dc33 -[UIWindow sendEvent:] + 683
    9   UIKit                               0x000000010e0fa9b1 -[UIApplication sendEvent:] + 246
    10  UIKit                               0x000000010e107a7d _UIApplicationHandleEventFromQueueEvent + 17370
    11  UIKit                               0x000000010e0e3103 _UIApplicationHandleEventQueue + 1961
    12  CoreFoundation                      0x000000010d397551 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
    13  CoreFoundation                      0x000000010d38d41d __CFRunLoopDoSources0 + 269
    14  CoreFoundation                      0x000000010d38ca54 __CFRunLoopRun + 868
    15  CoreFoundation                      0x000000010d38c486 CFRunLoopRunSpecific + 470
    16  GraphicsServices                    0x000000011480e9f0 GSEventRunModal + 161
    17  UIKit                               0x000000010e0e6420 UIApplicationMain + 1282
    18  RunawaySquare                       0x000000010d26cbee top_level_code + 78
    19  RunawaySquare                       0x000000010d26cc2a main + 42
    20  libdyld.dylib                       0x000000010fb8a145 start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException

它表示没有segue id。使用GameEnd，但有一个，如果在视图控制器上使用它可以工作

it says there is no segue id. with "GameEnd" but there is one and it works if used on the viewcontroller

推荐答案

这不起作用的原因是你是创建一个新的 GameViewController 实例，然后你就可以调用 gameOver 了。你真正想做的是引用你现有的 GameViewController

the reason this doesnt work is that you are creating a NEW instance of GameViewController and then you're calling gameOver on that. What you really want to do is reference your existing GameViewController

这有几种方法可以做到这一点，我会给你一个例子。

theres a few ways to do this, I'll give you one example.

将一个viewController属性添加到你的GameScene类

class GameScene {

    // we need to make sure to set this when we create our GameScene
    var viewController: GameViewController!

// after GameScene is instantiated
gameScene.viewController = self

现在我们引用了viewController，让我们在GameScene类中使用它

// somewhere in GameScene
self.viewController.gameOver()

这篇关于如何从GameScene中的ViewController调用方法的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！