对于动画UIDynamicAnimator的学习

正在第一步学习,看了一些其他人的博客,自己看了一下文档,这个类很简单,没有想象的难,但是可以写出漂亮的动画:

1.没有初步整理,附上一些方法,随后写出一个Demo

UIView *aView = [[UIView alloc]initWithFrame:CGRectMake(100, 50, 100, 100)];

aView.backgroundColor = [UIColor lightGrayColor];

[self.view addSubview:aView];

aView.transform = CGAffineTransformRotate(aView.transform, 45);

//重力作用

UIDynamicAnimator *anmimaor = [[UIDynamicAnimator alloc]initWithReferenceView:self.view];

UIGravityBehavior *beah = [[UIGravityBehavior alloc]initWithItems:@[aView]];

self.beah = beah;

[anmimaor addBehavior:beah];

//碰撞作用

UICollisionBehavior *collisionBehavior = [[UICollisionBehavior alloc]initWithItems:@[aView]];

collisionBehavior.translatesReferenceBoundsIntoBoundary = YES;

[anmimaor addBehavior:collisionBehavior];

self.collisionBehavior = collisionBehavior;

collisionBehavior.collisionDelegate = self;

//链接锚点

// UIAttachmentBehavior *attachmentBeah = [[UIAttachmentBehavior alloc]initWithItem:aView attachedToAnchor:CGPointMake(300, 400)];

// [anmimaor addBehavior:attachmentBeah];

UIPushBehavior *ppushBeah = [[UIPushBehavior alloc]initWithItems:@[aView] mode:UIPushBehaviorModeContinuous];

ppushBeah.pushDirection = CGVectorMake(10, 19);

[anmimaor addBehavior:ppushBeah];

//这个是吸附作用

// UISnapBehavior *snapBeah = [[UISnapBehavior alloc]initWithItem:aView snapToPoint:CGPointMake(10, 20)];

// snapBeah.damping = 20;

//

// [anmimaor addBehavior:snapBeah];

self.Animator = anmimaor;

// dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(5.0 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{

//

// [aView removeFromSuperview];

//

// });