我的代码是：
import UIKit
class BreakOutViewController: UIViewController, UICollisionBehaviorDelegate
{
var blockArray: [Block] = []
var allViewsArray: [UIView] = []
var screenWidth = (Float)(UIScreen.mainScreen().bounds.width)
var screenHight = (Float)(UIScreen.mainScreen().bounds.height)
var blockCount = 0
var dynamicAnimator = UIDynamicAnimator()
var ballArray : [UIView] = []
var collisionBehavior = UICollisionBehavior()
// var paddle = Block(frame: CGRect(x: 140, y: 645, width: 150, height: 10))
// var ball = Block(frame: CGRect(x: 197, y: 614, width: 30, height: 30))
var paddle = UIView()
var ball = UIView()
override func viewDidLoad() {
super.viewDidLoad()
dynamicAnimator = UIDynamicAnimator(referenceView: view)
createBlocks()
createPaddle()
createBall()
giveDynamicProperties()
}
func createBlocks()
{
var xPosition = 10
var yPosition = 20
let blockWidth = (Int(screenWidth - 55 ) / 5)
let blockHeight = 20
for rows in 1...10
{
for columns in 1...7
{
var drand1 = CGFloat(drand48())
var drand2 = CGFloat(drand48())
var drand3 = CGFloat(drand48())
var block = Block(frame: CGRect(x: xPosition, y: yPosition, width: blockWidth, height: blockHeight))
view.backgroundColor = UIColor.cyanColor()
block.backgroundColor = UIColor(red: drand1, green: drand2, blue: drand3, alpha: 1)
view.addSubview(block)
allViewsArray.append(block)
blockArray.append(block)
++blockCount
xPosition += (blockWidth + 10)
}
xPosition = 10
yPosition += (blockHeight + 10)
}
}
func createPaddle()
{
var paddle = Block(frame: CGRect(x: 140, y: 645, width: 150, height: 10))
var drand11 = CGFloat(drand48())
var drand12 = CGFloat(drand48())
var drand13 = CGFloat(drand48())
paddle.backgroundColor = UIColor(red: drand11, green: drand12, blue: drand13, alpha: 1)
view.addSubview(paddle)
allViewsArray.append(paddle)
}
func createBall()
{
var ball = Block(frame: CGRect(x: 197, y: 614, width: 30, height: 30))
ball.layer.cornerRadius = 15
var drand21 = CGFloat(drand48())
var drand22 = CGFloat(drand48())
var drand23 = CGFloat(drand48())
ball.backgroundColor = UIColor(red: drand21, green: drand22, blue: drand23, alpha: 1)
view.addSubview(ball)
allViewsArray.append(ball)
}
func giveDynamicProperties()
{
let dynamicItemBehavoir = UIDynamicItemBehavior(items: blockArray)
dynamicItemBehavoir.elasticity = 1.0
dynamicItemBehavoir.density = 100000
dynamicItemBehavoir.friction = 111111110
dynamicItemBehavoir.resistance = 1111110
dynamicItemBehavoir.allowsRotation = false
dynamicAnimator.addBehavior(dynamicItemBehavoir)
let dynamicItemBehavoir2 = UIDynamicItemBehavior(items: [paddle] )
dynamicItemBehavoir2.elasticity = 1.0
dynamicItemBehavoir2.density = 100000
dynamicItemBehavoir2.friction = 111111110
dynamicItemBehavoir2.resistance = 1111110
dynamicItemBehavoir2.charge = 3.0
dynamicItemBehavoir2.allowsRotation = false
dynamicAnimator.addBehavior(dynamicItemBehavoir2)
let dynamicItemBehavoir3 = UIDynamicItemBehavior(items: [ball] )
dynamicItemBehavoir3.elasticity = 1.0
dynamicItemBehavoir3.resistance = 0
dynamicItemBehavoir3.allowsRotation = false
dynamicAnimator.addBehavior(dynamicItemBehavoir3)
let pushBehavior = UIPushBehavior(items: [ball], mode: .Instantaneous)
pushBehavior.magnitude = 5
pushBehavior.pushDirection = CGVectorMake(-1.0 , 0.9 )
dynamicAnimator.addBehavior(pushBehavior)
collisionBehavior.translatesReferenceBoundsIntoBoundary = true
collisionBehavior = UICollisionBehavior(items: allViewsArray)
collisionBehavior.collisionDelegate = self
// collisionBehavior.addBoundaryWithIdentifier("verticalMin", fromPoint: CGPointMake(0, 0), toPoint: CGPointMake(0, CGRectGetHeight(view.frame)))
// collisionBehavior.addBoundaryWithIdentifier("verticalMax", fromPoint: CGPointMake(CGRectGetMaxX(view.frame), 0), toPoint: CGPointMake(CGRectGetMaxX(view.frame), CGRectGetHeight(view.frame)))
// collisionBehavior.addBoundaryWithIdentifier("horizontalMin", fromPoint: CGPointMake(0, CGRectGetMaxY(view.frame)), toPoint: CGPointMake(CGRectGetMaxX(view.frame), CGRectGetMaxY(view.frame)))
// collisionBehavior.addBoundaryWithIdentifier("horizontalMax", fromPoint: CGPointMake(0, 0), toPoint: CGPointMake(CGRectGetMaxX(view.frame), 0))
collisionBehavior.collisionMode = UICollisionBehaviorMode.Everything
dynamicAnimator.addBehavior(collisionBehavior)
}
override func prefersStatusBarHidden() -> Bool {
return true
}
@IBAction func pan(sender: UIPanGestureRecognizer)
{
paddle.center = CGPointMake(sender.locationInView(view).x, paddle.center.y)
dynamicAnimator.updateItemUsingCurrentState(paddle)
//remove all beahavoris for dynamic animator
//remove from subview
}
func collisionBehavior(behavior: UICollisionBehavior, beganContactForItem item1: UIDynamicItem, withItem item2: UIDynamicItem)
{
for block in blockArray
{
if item1.isEqual(Block) && item2.isEqual(ball)
{
// block dissappear
block.removeFromSuperview()
dynamicAnimator.updateItemUsingCurrentState(blockArray.removeAtIndex(0))
// collisionBehavior.removeItem(block)
--blockCount
print(blockCount)
}
dynamicAnimator.updateItemUsingCurrentState(block)
}
}
}
在输出中，我得到：
2016-04-12 10:25:48.321 Dynamic Animator[8732:289665] *** Assertion failure in -[UIDynamicAnimator _registerBodyForItem:], /BuildRoot/Library/Caches/com.apple.xbs/Sources/UIKit_Sim/UIKit-3512.30.14/UIDynamicAnimator.m:872
2016-04-12 10:25:48.343 Dynamic Animator[8732:289665] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid size {0, 0} for item <UIView: 0x7fdab1d34010; frame = (0 0; 0 0); layer = <CALayer: 0x7fdab1d34180>> in Dynamics'
*** First throw call stack:
(
0 CoreFoundation 0x0000000108f77e65 __exceptionPreprocess + 165
1 libobjc.A.dylib 0x000000010aedfdeb objc_exception_throw + 48
2 CoreFoundation 0x0000000108f77cca +[NSException raise:format:arguments:] + 106
3 Foundation 0x00000001095e84de -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 198
4 UIKit 0x000000010a3ffaca -[UIDynamicAnimator _registerBodyForItem:] + 784
5 UIKit 0x0000000109c968c0 -[UIDynamicItemBehavior _reevaluate:] + 306
6 UIKit 0x0000000109c969b1 -[UIDynamicItemBehavior _associate] + 66
7 UIKit 0x000000010a3fc700 -[UIDynamicAnimator _registerBehavior:] + 306
8 UIKit 0x000000010a3fc4bc -[UIDynamicAnimator addBehavior:] + 118
9 Dynamic Animator 0x00000001089e5ea3 _TFC16Dynamic_Animator22BreakOutViewController21giveDynamicPropertiesfS0_FT_T_ + 675
10 Dynamic Animator 0x00000001089e4aca _TFC16Dynamic_Animator22BreakOutViewController11viewDidLoadfS0_FT_T_ + 378
11 Dynamic Animator 0x00000001089e4b42 _TToFC16Dynamic_Animator22BreakOutViewController11viewDidLoadfS0_FT_T_ + 34
12 UIKit 0x0000000109b52f98 -[UIViewController loadViewIfRequired] + 1198
13 UIKit 0x0000000109b532e7 -[UIViewController view] + 27
14 UIKit 0x0000000109bb679c -[UITabBarController transitionFromViewController:toViewController:transition:shouldSetSelected:] + 502
15 UIKit 0x0000000109bb5710 -[UITabBarController transitionFromViewController:toViewController:] + 59
16 UIKit 0x0000000109bb1522 -[UITabBarController _setSelectedViewController:] + 377
17 UIKit 0x0000000109bb1398 -[UITabBarController setSelectedViewController:] + 234
18 UIKit 0x0000000109bb5581 -[UITabBarController _tabBarItemClicked:] + 481
19 UIKit 0x00000001099be194 -[UIApplication sendAction:to:from:forEvent:] + 92
20 UIKit 0x0000000109d8f6c4 -[UITabBar _sendAction:withEvent:] + 498
21 UIKit 0x00000001099be194 -[UIApplication sendAction:to:from:forEvent:] + 92
22 UIKit 0x0000000109b2d6fc -[UIControl sendAction:to:forEvent:] + 67
23 UIKit 0x0000000109b2d9c8 -[UIControl _sendActionsForEvents:withEvent:] + 311
24 UIKit 0x0000000109d9479c -[UITabBar(Static) _buttonUp:] + 103
25 UIKit 0x00000001099be194 -[UIApplication sendAction:to:from:forEvent:] + 92
26 UIKit 0x0000000109b2d6fc -[UIControl sendAction:to:forEvent:] + 67
27 UIKit 0x0000000109b2d9c8 -[UIControl _sendActionsForEvents:withEvent:] + 311
28 UIKit 0x0000000109b2caf8 -[UIControl touchesEnded:withEvent:] + 601
29 UIKit 0x0000000109a2d49b -[UIWindow _sendTouchesForEvent:] + 835
30 UIKit 0x0000000109a2e1d0 -[UIWindow sendEvent:] + 865
31 UIKit 0x00000001099dcb66 -[UIApplication sendEvent:] + 263
32 UIKit 0x00000001099b6d97 _UIApplicationHandleEventQueue + 6844
33 CoreFoundation 0x0000000108ea3a31 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
34 CoreFoundation 0x0000000108e9995c __CFRunLoopDoSources0 + 556
35 CoreFoundation 0x0000000108e98e13 __CFRunLoopRun + 867
36 CoreFoundation 0x0000000108e98828 CFRunLoopRunSpecific + 488
37 GraphicsServices 0x000000010e501ad2 GSEventRunModal + 161
38 UIKit 0x00000001099bc610 UIApplicationMain + 171
39 Dynamic Animator 0x00000001089ecefd main + 109
40 libdyld.dylib 0x000000010b9f192d start + 1
41 ??? 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)
无论我做什么，我都会得到这个。问题出在哪里？我遇到了一个sigabart错误，我已经尝试了一切方法来修复它。
这很有道理。
错误消息中最重要的部分是
由于未捕获的异常"NSInternalConsistencyException"，，正在终止应用程序
原因：'项目<的大小｛0，0｝无效；UI视图：0x7fdab1d34010；帧=（0 0；0 0）
您必须使用指定的UIView 初始值设定项
init(frame frame: CGRect)
提供一个大小而不是默认的初始值设定项（括号）
我认为这里缺少的是，当您在createBall()函数中执行var ball = Block(frame: CGRect(x: 197, y: 614, width: 30, height: 30))时，您正在创建一个与ball属性无关的新视图。
然后，当您将行为添加到ball属性时，它指的是您使用UIView()创建的属性，该属性的默认框架为CGRect.zero，您将获得异常。
在createBall()函数中，您应该在不使用var的情况下执行ball = Block(frame: CGRect(x: 197, y: 614, width: 30, height: 30))，以便它分配给您现有的属性，而不是创建新视图。同样的事情也适用于你的球拍。