swift fatal error: unexpectedly found nil while unwrapping an Optional value with Any Array

Question

我知道有几个 'similar' 错误与此有关，但它们似乎对我的情况没有帮助。也有可能语法没有像我期望的那样工作 Swift:

没有编译错误或警告，只有运行时错误

var allPlayerSpawnState: Array<Array<Any>>!

var pName: String = "defaultPlayerName"
var pShape = "box"
var pDimensions = SCNVector4(1,1,1,0) 
var pPosition = SCNVector3(0, 0, 0)
var pRotation = SCNVector3(0, 0, 0)
var pForce = SCNVector3(0, 0, 0)
var pTorque = SCNVector4(0, 0, 0, 0)
var pSkinArray = [UIColor]()
var pEmitter = false
var pEmitterUIColor = UIColor.random() // custom random color
var pState: SCNPhysicsBodyType = .Static 

... values change here

print("\n\(pName)")
print(pShape)
print(pDimensions)
print(pPosition)
print(pRotation)
print(pForce)
print(pTorque)
print(pSkinArray)
print(pEmitter)
print(pEmitterUIColor)
print("\(pState)\n")

let tempArray: Array<Any> = [pName, pShape, pDimensions, pPosition, pRotation, pForce, pTorque, pSkinArray, pEmitter, pEmitterUIColor, pState]
allPlayerSpawnState.append(tempArray) // runtime error here: "Thread 1: EXE_BAD_INSTRUCTION (code=EXE_I386_INVOP, subcode=0x0)"

... later wanting to use it like this:

for i in allPlayerSpawnState {
    some_function(i[0] as! String, pShape: i[1] as! String, pDimensions: i[2] as! SCNVector4, pPosition: i[3] as! SCNVector3, pRotation: i[4] as! SCNVector3, pForce: i[5] as! SCNVector3, pTorque: i[6] as! SCNVector4, pSkinArray: i[7] as! [UIColor], pEmitter: i[8] as! Bool, pEmitterUIColor: i[9] as! UIColor, pState: i[10] as! SCNPhysicsBodyType)
}

这是输出

nameOfPlayer
sphere
SCNVector4(x: 1.0, y: 1.0, z: 1.0, w: 0.0)
SCNVector3(x: 0.0, y: -10.0, z: 0.0)
SCNVector3(x: 0.0, y: 0.0, z: 0.0)
SCNVector3(x: 0.0, y: 0.0, z: 0.0)
SCNVector4(x: 0.0, y: 0.0, z: 0.0, w: 0.0)
[UIDeviceRGBColorSpace 1 0 1 1]
true
UIDeviceRGBColorSpace 0 1 0 1
SCNPhysicsBodyType

fatal error: unexpectedly found nil while unwrapping an Optional value

当我按住 option 键并单击数组中的元素时，none 个元素是可选的，所以我不知道错误的意思。

感谢任何帮助。如果你知道我可以不使用 "Any" 的方法，这可能会帮助我防止在“......以后想这样做：”之后指出的未来潜在问题：“

Answer 1

数组已声明但未初始化。目前您要向数组追加一些内容 nil 并导致运行时错误。

这样初始化数组：

var allPlayerSpawnState = Array<Array<Any>>()

swift fatal error: unexpectedly found nil while unwrapping an Optional value with Any Array

swift fatal error: unexpectedly found nil while unwrapping an Optional value with Any Array

arrays

optional

multidimensional-array

swift

swift3