Question

我正在努力将最简单的计时器实现到我的项目中，因为我尝试的每一个都给了我这个错误日志：

2015-12-19 14:23:47.164 Reanimate[14879:898570] -[Reanimate.helicut 

timerFunc]: unrecognized selector sent to instance 0x7ff95d29d3f0
2015-12-19 14:23:47.169 Reanimate[14879:898570] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[Reanimate.helicut timerFunc]: unrecognized selector sent to instance 0x7ff95d29d3f0'
*** First throw call stack:
(
    0   CoreFoundation                      0x0000000105dfef65 __exceptionPreprocess + 165
    1   libobjc.A.dylib                     0x0000000107e88deb objc_exception_throw + 48
    2   CoreFoundation                      0x0000000105e0758d -[NSObject(NSObject) doesNotRecognizeSelector:] + 205
    3   CoreFoundation                      0x0000000105d54f7a ___forwarding___ + 970
    4   CoreFoundation                      0x0000000105d54b28 _CF_forwarding_prep_0 + 120
    5   Foundation                          0x0000000106408671 __NSFireTimer + 83
    6   CoreFoundation                      0x0000000105d5f364 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 20
    7   CoreFoundation                      0x0000000105d5ef11 __CFRunLoopDoTimer + 1089
    8   CoreFoundation                      0x0000000105d208b1 __CFRunLoopRun + 1937
    9   CoreFoundation                      0x0000000105d1fe98 CFRunLoopRunSpecific + 488
    10  GraphicsServices                    0x000000010bfc7ad2 GSEventRunModal + 161
    11  UIKit                               0x0000000106a11676 UIApplicationMain + 171
    12  Reanimate                           0x0000000105be62dd main + 109
    13  libdyld.dylib                       0x0000000108a1892d start + 1
    14  ???                                 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)

以下是代码本身：

import Foundation
import SpriteKit
import UIKit

var heli: SKSpriteNode?
var helibg1: SKSpriteNode?
var helibg2: SKSpriteNode?
weak var myTypeWriter: SKLabelNode?
var text = String()
var text2 = String()
var text3 = String()
var text4 = String()
var texty = String()
var myCounter = 0


class helicut: SKScene{
    var timer = NSTimer()

    override func didMoveToView(view: SKView) {
        heli = self.childNodeWithName("heli") as? SKSpriteNode
        helibg1 = self.childNodeWithName("helibg1") as? SKSpriteNode
        helibg2 = self.childNodeWithName("helibg2") as? SKSpriteNode
        myTypeWriter = self.childNodeWithName("type") as? SKLabelNode

        func timerr() {
            NSTimer.scheduledTimerWithTimeInterval(2.0, target: self, selector: "timerFunc", userInfo: nil, repeats: false)
        }
        func timerFunc() {
            print("it worked")
        }


        timerr()

正如您所看到的，代码相对简单，但即便如此，我也不知道可能导致异常的原因。我尝试过使用不同的选择器语法，并且几乎所有东西都搞乱了，但我很困惑。非常感谢帮助。

Answer 1

将timerr()和timerFunc()放在didMoveToView()之外。

匹配selector的函数必须在类的顶层定义。

class helicut: SKScene {
  var timer = NSTimer()

  override func didMoveToView(view: SKView) {
    heli = self.childNodeWithName("heli") as? SKSpriteNode
    helibg1 = self.childNodeWithName("helibg1") as? SKSpriteNode
    helibg2 = self.childNodeWithName("helibg2") as? SKSpriteNode
    myTypeWriter = self.childNodeWithName("type") as? SKLabelNode
    timerr()
  }

  func timerr() {
    NSTimer.scheduledTimerWithTimeInterval(2.0, target: self, selector: "timerFunc", userInfo: nil, repeats: false)
  }

  func timerFunc() {
    print("it worked")
  }

NSTimer抛出异常

1 个答案: