我在使用 CAKeyframeAnimation 时遇到了一个奇怪的错误，奇怪的部分是“SwiftDeferredNSArray doubleValue”，为什么我在处理关键帧动画时会得到它？

我得到以下跟踪，但有这些错误:

-[_TtCs21_SwiftDeferredNSArray doubleValue]: unrecognized selector sent to instance 0x12b55e060


*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[_TtCs21_SwiftDeferredNSArray doubleValue]: unrecognized selector sent to instance 0x12b55e060'


#0  0x0000000182ec0d58 in -[NSObject(NSObject) doesNotRecognizeSelector:] ()
#1  0x0000000182ebddcc in ___forwarding___ ()
#2  0x0000000182dbcc6c in _CF_forwarding_prep_0 ()
#3  0x0000000185b86b24 in CAObject_setValueForKeyPath_ ()
#4  0x0000000185b5b9e0 in -[CALayer setValue:forKeyPath:] ()
#5  0x0000000185c6ebd8 in -[CAKeyframeAnimation applyForTime:presentationObject:modelObject:] ()
#6  0x0000000185b5aabc in CA::Layer::presentation_layer(CA::Transaction*) ()
#7  0x0000000187f68b6c in _UIViewEatsTouches ()
#8  0x0000000187f68830 in -[UIView(Geometry) hitTest:withEvent:] ()
#9  0x000000018823f300 in -[UIView(Geometry) _hitTest:withEvent:windowServerHitTestWindow:] ()
#10 0x0000000187f68e2c in __38-[UIView(Geometry) hitTest:withEvent:]_block_invoke ()
#11 0x0000000182dab954 in __53-[__NSArrayM enumerateObjectsWithOptions:usingBlock:]_block_invoke ()
#12 0x0000000182dab84c in -[__NSArrayM enumerateObjectsWithOptions:usingBlock:] ()
#13 0x0000000187f68950 in -[UIView(Geometry) hitTest:withEvent:] ()
#14 0x000000018823f300 in -[UIView(Geometry) _hitTest:withEvent:windowServerHitTestWindow:] ()
#15 0x0000000187f68e2c in __38-[UIView(Geometry) hitTest:withEvent:]_block_invoke ()
#16 0x0000000182dab954 in __53-[__NSArrayM enumerateObjectsWithOptions:usingBlock:]_block_invoke ()
#17 0x0000000182dab84c in -[__NSArrayM enumerateObjectsWithOptions:usingBlock:] ()
#18 0x0000000187f68950 in -[UIView(Geometry) hitTest:withEvent:] ()
#19 0x00000001881f4cc8 in _UIApplicationHandleDigitizerEvent ()
#20 0x0000000187f2aab8 in _UIApplicationHandleEventQueue ()
#21 0x0000000182e703a4 in __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ ()
#22 0x0000000182e6fe38 in __CFRunLoopDoSources0 ()
#23 0x0000000182e6db38 in __CFRunLoopRun ()
#24 0x0000000182d98c60 in CFRunLoopRunSpecific ()
#25 0x000000018466c088 in GSEventRunModal ()
#26 0x0000000187f95fe4 in UIApplicationMain ()
#27 0x00000001001dd614 in main at /Users/MyApp/AppDelegate.swift:20

请求的附加代码:

    override func didUpdateFocusInContext(context: UIFocusUpdateContext, withAnimationCoordinator coordinator: UIFocusAnimationCoordinator) {

    self.opacityView.layer.removeAnimationForKey("a")

    if (self.focused)
    {
        self.opacityView.layer.addAnimation(a1, forKey: "a")
    }
}


// Animation a1
let ani = CAKeyframeAnimation(keyPath: "transform.scale")
ani.timingFunctions = [CAMediaTimingFunction(controlPoints: 0.06,0.756,0.223,1.0)]
ani.values = [[1.0,1.0,1.0],[1.0*scaleFactor,1.0*scaleFactor,1.0*scaleFactor]]
ani.duration = 0.267
ani.fillMode = kCAFillModeForwards
ani.removedOnCompletion = false

最佳答案

我知道这有点晚了，但我想无论如何我都会为遇到此错误的其他人提供答案。据我所知，我猜你看到这个是因为 ani.values 应该是单个关键帧值的数组，而不是数组的数组。例如，

ani.values = [1.0, 1.0*scaleFactor]

关于swift - CAKeyframeAnimation doesNotRecognizeSelector，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/38080757/