[英]Resize UIView with UICollisionBehavior
我最近正在尝试使用UIKitDynamics创建一个类似pong的游戏。 我成功构建了核心游戏。 现在,我想添加一些其他机制。
例如,减少桨叶尺寸的行为。 我添加了一个执行此类操作的NSTimer。 但是我注意到,桨的CollisionBehavior不会与桨同时调整大小。
这是我的代码:
func decreaseBarSize() {
player1Bar.bounds = CGRect(x: player1Bar.frame.minX, y: player1Bar.frame.minY, width: player1Bar.bounds.width - 1, height: player1Bar.frame.height)
player1Bar.layoutIfNeeded()
animator.updateItemUsingCurrentState(player1Bar)
}
这是桨控制的功能:
func moveBar() {
if player == .Player1 {
let barFrame = player1Bar.frame
switch self.direction {
case .Right:
if Int(barFrame.maxX) < superviewWidth - 10 {
player1Bar.frame = CGRect(x: barFrame.minX + 1, y: barFrame.minY, width: barFrame.width, height: barFrame.height)
}
break
case .Left:
if Int(barFrame.minX) > 10 {
player1Bar.frame = CGRect(x: player1Bar.frame.minX - 1, y: barFrame.minY, width: barFrame.width, height: barFrame.height)
}
break
default:
break
}
animator.updateItemUsingCurrentState(player1Bar)
} else if player == .Player2 {
let barFrame = player2Bar.frame
switch self.direction {
case .Right:
if Int(barFrame.maxX) < superviewWidth - 10 {
player2Bar.frame = CGRect(x: barFrame.minX + 1, y: barFrame.minY, width: barFrame.width, height: barFrame.height)
}
break
case .Left:
if Int(barFrame.minX) > 10 {
player2Bar.frame = CGRect(x: barFrame.minX - 1, y: barFrame.minY, width: barFrame.width, height: barFrame.height)
}
break
default:
break
}
animator.updateItemUsingCurrentState(player2Bar)
}
}
有没有人意识到这一点?
非常感谢你!
首先向划桨添加边界。 就像是:
yourBehavior.collider.addBoundaryWithIdentifier("aBarrierName", forPath: UIBezierPath(rect: yourPlayerPaddle.frame))
然后使用func crashBehavior检查冲突并执行转换。 就像是:
func collisionBehavior(behavior: UICollisionBehavior, beganContactForItem item: UIDynamicItem, withBoundaryIdentifier identifier: NSCopying?, atPoint p: CGPoint) {
print("Contact by - \(identifier)")
let collidingView = item as? UIView
collidingView?.transform = CGAffineTransformMakeScale(1.5 , 1)
UIView.animateWithDuration(0.4) {
collidingView?.transform = CGAffineTransformMakeScale(1 , 1)
}
}
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