核心图像 NSException 崩溃,why/what?
Core Image NSException Crash, why/what?
在 SpriteKit 中,我使用 Effect 节点将简单的渐变应用于简单的矩形。
这似乎工作正常,但是将它添加到场景中会导致 NSException
。
请问:我做错了什么?
import SpriteKit
import GameplayKit
import CoreImage
class GameScene: SKScene {
override func didMove(to view: SKView) {
let rectangle = SKSpriteNode(color: .black, size: CGSize(width: 480, height: 80))
let gradientOne = CIFilter(name: "CILinearGradient", withInputParameters:[
"inputPoint0" : CIVector(x: 0, y: 0), "inputColor0" : SKColor.red,
"inputPoint1" : CIVector(x: 200,y: 0), "inputColor1" : SKColor.blue])
//
let effectGradient = SKEffectNode()
effectGradient.filter = gradientOne
effectGradient.addChild(rectangle)
effectGradient.blendMode = .alpha
effectGradient.shouldRasterize = true
addChild(effectGradient) //***** CRASH IS HERE *****
}
}
这是紧缩的输出:
0 CoreFoundation 0x000000010886ad4b __exceptionPreprocess + 171
1 libobjc.A.dylib 0x000000010565021e objc_exception_throw + 48
2 CoreFoundation 0x000000010886ac99 -[NSException raise] + 9
3 CoreImage 0x0000000105b2f34d -[CIFilter setValue:forUndefinedKey:] + 137
4 Foundation 0x000000010515e9df -[NSObject(NSKeyValueCoding) setValue:forKey:] + 291
5 SpriteKit 0x0000000105efa395 _ZN13SKCEffectNode17addRequistePassesEP13SKCRenderInfoPNSt3__14listINS2_10shared_ptrI13SKCRenderPassEENS2_9allocatorIS6_EEEE + 377
6 SpriteKit 0x0000000105f3fbde _ZN11SKCRenderer18doBuildRenderGroupEP7SKCNode14SKCRenderState15matrix_float4x4 + 488
7 SpriteKit 0x0000000105f3fecb _ZN11SKCRenderer18doBuildRenderGroupEP7SKCNode14SKCRenderState15matrix_float4x4 + 1237
8 SpriteKit 0x0000000105f3ef1c _ZN11SKCRenderer16buildRenderGroupERKNSt3__110shared_ptrI18SKCRenderSortGroupEE + 1264
9 SpriteKit 0x0000000105f3b686 _ZN11SKCRenderer15buildRenderPassERKNSt3__110shared_ptrI13SKCRenderPassEE + 88
10 SpriteKit 0x0000000105f3af7e _ZN11SKCRenderer6renderEP7SKCNodeDv4_fRKNSt3__110shared_ptrI15jet_framebufferEEDv4_j15matrix_float4x4bP12NSDictionaryP8SKCStatsSE_d + 2150
11 SpriteKit 0x0000000105ebec09 __59-[SKView _renderSynchronouslyForTime:preRender:postRender:]_block_invoke + 855
12 SpriteKit 0x0000000105ebe82a -[SKView _renderSynchronouslyForTime:preRender:postRender:] + 249
13 SpriteKit 0x0000000105ec1884 -[SKView layoutSubviews] + 177
14 UIKit 0x0000000106187ab8 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 1237
15 QuartzCore 0x000000010db60bf8 -[CALayer layoutSublayers] + 146
16 QuartzCore 0x000000010db54440 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 366
17 QuartzCore 0x000000010db542be _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 24
18 QuartzCore 0x000000010dae2318 _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 280
19 QuartzCore 0x000000010db0f3ff _ZN2CA11Transaction6commitEv + 475
20 QuartzCore 0x000000010db0fd6f _ZN2CA11Transaction17observer_callbackEP19__CFRunLoopObservermPv + 113
21 CoreFoundation 0x000000010880f267 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 23
22 CoreFoundation 0x000000010880f1d7 __CFRunLoopDoObservers + 391
23 CoreFoundation 0x00000001087f38a6 CFRunLoopRunSpecific + 454
24 UIKit 0x00000001060bcaea -[UIApplication _run] + 434
25 UIKit 0x00000001060c2c68 UIApplicationMain + 159
26 testinGradients 0x000000010506e73f main + 111
27 libdyld.dylib 0x000000010981a68d start + 1
28 ??? 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
更新:进一步的混乱!!!
尽管 Benzi 的回答有效,但我很困惑。
关于他的技术,三件事令人困惑:
困惑一:
var inputImage: CIImage?
对我来说,这看起来像 inputImage 没有初始化,没有创建,只是被定义为 CIImage 类型——可选!所以它还不存在。
困惑二:
override var outputImage: CIImage? {
这个闭包是怎么工作的,为什么会在这里?
困惑3:
guard let inputImage = inputImage else {
return nil
}
这说的是让inputImage成为CIImage,但是它的内容和定义是从哪里来的呢?尺寸、形状等……来自哪里?
我们知道它以某种方式获取传递到这里的 SKSpriteNode
的节点实例的详细信息,因为它被使用了 - 就在这里:
let extent = inputImage.extent
但是作为 SKEffectNode
的子类添加的 SKSpriteNode
如何成为 CIFilter
子类中的 inputImage
值?
提供给 SKEffectNode
的核心图像 filter
必须有一个 inputImage
参数并产生一个 outputImage
参数(除了其他输入参数以控制实际效果)
CILinearGradient
没有 inputImage
和 outputImage
参数,因此不能用作 SKEffectNode
过滤器。
如果您想使用CILinearGradient
,您需要创建一个自定义的 CIFilter,如下所示:
class SpriteKitGradient : CIFilter {
var point0 = CIVector.init(x: 0, y: 0)
var point1 = CIVector.init(x: 0, y: 0)
var color0 = CIColor.black()
var color1 = CIColor.white()
var inputImage: CIImage?
override var outputImage: CIImage? {
guard let inputImage = inputImage else {
return nil
}
let gradient = CIFilter(name: "CILinearGradient", withInputParameters:
[
"inputPoint0" : point0, "inputColor0" : color0,
"inputPoint1" : point1, "inputColor1" : color1
]
)
let extent = inputImage.extent
return gradient!.outputImage?.cropping(to: extent)
}
}
class GameScene: SKScene {
override func didMove(to view: SKView) {
let node = SKSpriteNode(color: .green, size: CGSize(width: 100, height: 100))
let gradient = SpriteKitGradient()
gradient.color0 = CIColor.blue()
gradient.color1 = CIColor.red()
gradient.point0 = CIVector(x: 0, y: 0)
gradient.point1 = CIVector(x: 200, y: 0)
let effectNode = SKEffectNode()
effectNode.filter = gradient
effectNode.addChild(node)
effectNode.position = CGPoint(x: 200, y: 200)
addChild(effectNode)
}
}
这应该创建:
根据为数不多的(非常少的)苹果官方文档here我们知道:
If you wish to use a Core Image filter that doesn't have an inputImage
parameter, such as a sunbeams generator, you can subclass CIFilter and
add an inputImage property.
因为我们在SKEffectNode
中没有inputImage 属性所以必须按照说明,猜测SKEffectNode
使用节点"auto"生成一个inputImage给它是过滤器,希望将来有更详细的文档..
在 SpriteKit 中,我使用 Effect 节点将简单的渐变应用于简单的矩形。
这似乎工作正常,但是将它添加到场景中会导致 NSException
。
请问:我做错了什么?
import SpriteKit
import GameplayKit
import CoreImage
class GameScene: SKScene {
override func didMove(to view: SKView) {
let rectangle = SKSpriteNode(color: .black, size: CGSize(width: 480, height: 80))
let gradientOne = CIFilter(name: "CILinearGradient", withInputParameters:[
"inputPoint0" : CIVector(x: 0, y: 0), "inputColor0" : SKColor.red,
"inputPoint1" : CIVector(x: 200,y: 0), "inputColor1" : SKColor.blue])
//
let effectGradient = SKEffectNode()
effectGradient.filter = gradientOne
effectGradient.addChild(rectangle)
effectGradient.blendMode = .alpha
effectGradient.shouldRasterize = true
addChild(effectGradient) //***** CRASH IS HERE *****
}
}
这是紧缩的输出:
0 CoreFoundation 0x000000010886ad4b __exceptionPreprocess + 171
1 libobjc.A.dylib 0x000000010565021e objc_exception_throw + 48
2 CoreFoundation 0x000000010886ac99 -[NSException raise] + 9
3 CoreImage 0x0000000105b2f34d -[CIFilter setValue:forUndefinedKey:] + 137
4 Foundation 0x000000010515e9df -[NSObject(NSKeyValueCoding) setValue:forKey:] + 291
5 SpriteKit 0x0000000105efa395 _ZN13SKCEffectNode17addRequistePassesEP13SKCRenderInfoPNSt3__14listINS2_10shared_ptrI13SKCRenderPassEENS2_9allocatorIS6_EEEE + 377
6 SpriteKit 0x0000000105f3fbde _ZN11SKCRenderer18doBuildRenderGroupEP7SKCNode14SKCRenderState15matrix_float4x4 + 488
7 SpriteKit 0x0000000105f3fecb _ZN11SKCRenderer18doBuildRenderGroupEP7SKCNode14SKCRenderState15matrix_float4x4 + 1237
8 SpriteKit 0x0000000105f3ef1c _ZN11SKCRenderer16buildRenderGroupERKNSt3__110shared_ptrI18SKCRenderSortGroupEE + 1264
9 SpriteKit 0x0000000105f3b686 _ZN11SKCRenderer15buildRenderPassERKNSt3__110shared_ptrI13SKCRenderPassEE + 88
10 SpriteKit 0x0000000105f3af7e _ZN11SKCRenderer6renderEP7SKCNodeDv4_fRKNSt3__110shared_ptrI15jet_framebufferEEDv4_j15matrix_float4x4bP12NSDictionaryP8SKCStatsSE_d + 2150
11 SpriteKit 0x0000000105ebec09 __59-[SKView _renderSynchronouslyForTime:preRender:postRender:]_block_invoke + 855
12 SpriteKit 0x0000000105ebe82a -[SKView _renderSynchronouslyForTime:preRender:postRender:] + 249
13 SpriteKit 0x0000000105ec1884 -[SKView layoutSubviews] + 177
14 UIKit 0x0000000106187ab8 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 1237
15 QuartzCore 0x000000010db60bf8 -[CALayer layoutSublayers] + 146
16 QuartzCore 0x000000010db54440 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 366
17 QuartzCore 0x000000010db542be _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 24
18 QuartzCore 0x000000010dae2318 _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 280
19 QuartzCore 0x000000010db0f3ff _ZN2CA11Transaction6commitEv + 475
20 QuartzCore 0x000000010db0fd6f _ZN2CA11Transaction17observer_callbackEP19__CFRunLoopObservermPv + 113
21 CoreFoundation 0x000000010880f267 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 23
22 CoreFoundation 0x000000010880f1d7 __CFRunLoopDoObservers + 391
23 CoreFoundation 0x00000001087f38a6 CFRunLoopRunSpecific + 454
24 UIKit 0x00000001060bcaea -[UIApplication _run] + 434
25 UIKit 0x00000001060c2c68 UIApplicationMain + 159
26 testinGradients 0x000000010506e73f main + 111
27 libdyld.dylib 0x000000010981a68d start + 1
28 ??? 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
更新:进一步的混乱!!!
尽管 Benzi 的回答有效,但我很困惑。
关于他的技术,三件事令人困惑:
困惑一:
var inputImage: CIImage?
对我来说,这看起来像 inputImage 没有初始化,没有创建,只是被定义为 CIImage 类型——可选!所以它还不存在。
困惑二:
override var outputImage: CIImage? {
这个闭包是怎么工作的,为什么会在这里?
困惑3:
guard let inputImage = inputImage else {
return nil
}
这说的是让inputImage成为CIImage,但是它的内容和定义是从哪里来的呢?尺寸、形状等……来自哪里?
我们知道它以某种方式获取传递到这里的 SKSpriteNode
的节点实例的详细信息,因为它被使用了 - 就在这里:
let extent = inputImage.extent
但是作为 SKEffectNode
的子类添加的 SKSpriteNode
如何成为 CIFilter
子类中的 inputImage
值?
提供给 SKEffectNode
的核心图像 filter
必须有一个 inputImage
参数并产生一个 outputImage
参数(除了其他输入参数以控制实际效果)
CILinearGradient
没有 inputImage
和 outputImage
参数,因此不能用作 SKEffectNode
过滤器。
如果您想使用CILinearGradient
,您需要创建一个自定义的 CIFilter,如下所示:
class SpriteKitGradient : CIFilter {
var point0 = CIVector.init(x: 0, y: 0)
var point1 = CIVector.init(x: 0, y: 0)
var color0 = CIColor.black()
var color1 = CIColor.white()
var inputImage: CIImage?
override var outputImage: CIImage? {
guard let inputImage = inputImage else {
return nil
}
let gradient = CIFilter(name: "CILinearGradient", withInputParameters:
[
"inputPoint0" : point0, "inputColor0" : color0,
"inputPoint1" : point1, "inputColor1" : color1
]
)
let extent = inputImage.extent
return gradient!.outputImage?.cropping(to: extent)
}
}
class GameScene: SKScene {
override func didMove(to view: SKView) {
let node = SKSpriteNode(color: .green, size: CGSize(width: 100, height: 100))
let gradient = SpriteKitGradient()
gradient.color0 = CIColor.blue()
gradient.color1 = CIColor.red()
gradient.point0 = CIVector(x: 0, y: 0)
gradient.point1 = CIVector(x: 200, y: 0)
let effectNode = SKEffectNode()
effectNode.filter = gradient
effectNode.addChild(node)
effectNode.position = CGPoint(x: 200, y: 200)
addChild(effectNode)
}
}
这应该创建:
根据为数不多的(非常少的)苹果官方文档here我们知道:
If you wish to use a Core Image filter that doesn't have an inputImage parameter, such as a sunbeams generator, you can subclass CIFilter and add an inputImage property.
因为我们在SKEffectNode
中没有inputImage 属性所以必须按照说明,猜测SKEffectNode
使用节点"auto"生成一个inputImage给它是过滤器,希望将来有更详细的文档..