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사용자 지정 이벤트가있는 CAKeyFrameAnimation을 처리하는 적절한 방법은 무엇입니까? 나는 가능한 한 가장 단순한 방법으로 정확히 무엇을하고 있는지를 보여주는 테스트 프로젝트를 만들었다. Here is my XCode Instruments Memory Allocations TraceCAKeyFrameAnimation을 적절하게 처리하는 방법
Here is my Xamarin Studio Project
은 단순히 프로젝트를 실행,이 메모리 할당 추적하는 동안 내가 한 일을 재현합니다. 녹색 버튼을 10 번 누릅니다. 녹색 버튼을 누를 때마다 파란색 정사각형이 움직입니다.그런 다음 메모리 사용량을 계산하십시오. 내 CreateAnimationEventHandler_Position_AnimationStopped 함수에서 애니메이션을 삭제합니다. 또한 인스 트루먼 트가 메모리가 새지 않는 비 오브젝트가 많다고 말하고 있습니다 ... 그 원인은 무엇입니까? CAKeyFrameAnimations를 올바르게 처리하려면 어떻게해야합니까?
나는 그것을 처분하는 몇 가지 다른 방법을 시도했다. 여기 내 결과가 있습니다. 단지 10 번의 버튼 누름 후에 약 30-100kb의 비 객체 흡수 메모리를 얻습니다. 나는 틀린 일을해야만합니다. 여기
그리고
public override void ViewDidLoad()
{
base.ViewDidLoad();
// Perform any additional setup after loading the view, typically from a nib.
UIImageView ViewToAnimation = new UIImageView(new RectangleF(100, 100, 100, 100));
ViewToAnimation.BackgroundColor = UIColor.Blue;
View.AddSubview(ViewToAnimation);
GoButton = new UIButton(new RectangleF(0, 0, 100, 100));
GoButton.BackgroundColor = UIColor.Green;
View.AddSubview(GoButton);
GoButton.TouchUpInside += delegate {
animation = CreateAnimation_Position(ViewToAnimation, new Random().Next(0,500), new Random().Next(0,700), ViewToAnimation.Center.X, ViewToAnimation.Center.Y, 0.4f, CAMediaTimingFunction.FromName (CAMediaTimingFunction.Linear));
ViewToAnimation.Layer.AddAnimation(animation, "animation");
};
}
public CAKeyFrameAnimation CreateAnimation_Position (UIView view, float toX, float toY, float fromX, float fromY, float duration_s, CAMediaTimingFunction timingFunction)
{
AppDelegate appDel = (AppDelegate)UIApplication.SharedApplication.Delegate;
CAKeyFrameAnimation positionAnimation = CAKeyFrameAnimation.GetFromKeyPath ("position");
positionAnimation.Duration = duration_s;
positionAnimation.TimingFunction = timingFunction;
PointF toLocation = new PointF(toX, toY);
// Make a path for this animation
CGPath path = new CGPath();
PointF[] lines = {new PointF(fromX, fromY), new PointF(toX, toY)};
path.AddLines(lines);
positionAnimation.Path = path;
event_started = CreateAnimationEventHandler_Position_AnimationStarted(view, toLocation);
positionAnimation.AnimationStarted += event_started;
event_stopped = CreateAnimationEventHandler_Position_AnimationStopped(view, positionAnimation);
positionAnimation.AnimationStopped += event_stopped;
return positionAnimation;
}
public EventHandler CreateAnimationEventHandler_Position_AnimationStarted (UIView view, PointF toLocation)
{
EventHandler animationStartedEvent = delegate {
// Apply the Position change to the Layer
view.Layer.Position = toLocation;
};
return animationStartedEvent;
}
public EventHandler<CAAnimationStateEventArgs> CreateAnimationEventHandler_Position_AnimationStopped (UIView view, CAKeyFrameAnimation animationToDispose)
{
EventHandler<CAAnimationStateEventArgs> animationStoppedEvent = delegate(object sender, CAAnimationStateEventArgs e) {
// Console.WriteLine("Finished! finished = " + e.Finished);
// Console.WriteLine("Removing and Disposing Events");
// animationToDispose.AnimationStarted -= event_started;
// animationToDispose.AnimationStopped -= event_stopped;
// event_started = null;
// event_stopped = null;
//
//
// Console.WriteLine("Disposing Animation");
// animationToDispose.Path.Dispose();
// For some reason, only calling Dispose on the animation and NOT calling dispose on the Path & events seems to be more efficient... no idea why
animationToDispose.Dispose();
};
return animationStoppedEvent;
}