CloseDoorAnimation.m

#import "ViewController.h"
#import <QuartzCore/QuartzCore.h>


@interface ViewController () {
CALayer* _myLayer;
BOOL _isShowed;
BOOL _isAnimationRunning;
}

@property (nonatomic, retain) CABasicAnimation* myAnimation1;
@property (nonatomic, retain) CABasicAnimation* myAnimation2;
@end
@implementation ViewController


///////////////////////////////////////////////////////////////////////////////////////////////////
- (void)viewDidLoad{
  [super viewDidLoad];
  _myLayer = [[CALayer alloc] init];
  _myLayer.contents = (id)[[UIImage imageNamed:@"a.png"] CGImage];
  _myLayer.bounds = CGRectMake(0, 0, self.view.bounds.size.width / 2, self.view.bounds.size.height);
  _myLayer.anchorPoint = CGPointMake(0, 0.5);
  _myLayer.position = CGPointMake(0, self.view.bounds.size.height / 2);
  /**
  * 给图层设置右上角和右下角的圆角
  */
  UIBezierPath *maskPath;
  maskPath = [UIBezierPath bezierPathWithRoundedRect:_myLayer.bounds byRoundingCorners:(UIRectCornerTopRight | UIRectCornerBottomRight) cornerRadii:CGSizeMake(10.0, 10.0)];
  CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init];
  maskLayer.frame = _myLayer.bounds;
  maskLayer.path = maskPath.CGPath;
  _myLayer.mask = maskLayer;
  /**
  * 给图层设置默认的视角和反转角度，默认为-45度。
  */
  CATransform3D perspective = CATransform3DIdentity;
  perspective.m34 = 1.0 / 500.0;
  CATransform3D rotation = CATransform3DRotate(perspective, - M_PI_4, 0, 1, 0);
  _myLayer.transform = rotation;
  [self.view.layer addSublayer:_myLayer];
} 


///////////////////////////////////////////////////////////////////////////////////////////////////
- (CABasicAnimation*) myAnimation1 {
  if (!_myAnimation1) {
    _myAnimation1 = [CABasicAnimation
    animationWithKeyPath:@"transform.rotation.y"];
    _myAnimation1.delegate = self;
    _myAnimation1.fromValue = @( - M_PI_4);
    _myAnimation1.toValue = @(0);
    _myAnimation1.removedOnCompletion = YES;
    _myAnimation1.duration = .5;
    _myAnimation1.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn];
  }

  return _myAnimation1;
}


///////////////////////////////////////////////////////////////////////////////////////////////////
- (CABasicAnimation*) myAnimation2 {
  if (!_myAnimation2) {
    _myAnimation2 = [CABasicAnimation
    animationWithKeyPath:@"transform.rotation.y"];
    _myAnimation2.delegate = self;
    _myAnimation2.fromValue = @(0);
    _myAnimation2.toValue = @(- M_PI_4);
    _myAnimation2.removedOnCompletion = YES;
    _myAnimation2.duration = .5;
    _myAnimation2.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn];
  }
  return _myAnimation2;
}


///////////////////////////////////////////////////////////////////////////////////////////////////
- (void) display {
  // First we update the model layer's property.
  CATransform3D perspective = CATransform3DIdentity;
  perspective.m34 = 1.0 / 500.0;
  CATransform3D rotation = CATransform3DRotate(perspective, M_PI * 2, 0, 1, 0);
  _myLayer.transform = rotation;
  // Now we attach the animation.
  [_myLayer addAnimation:self.myAnimation1 forKey:@"animation1"];
  _isShowed = YES;
}


///////////////////////////////////////////////////////////////////////////////////////////////////
- (void) disappear {
  // First we update the model layer's property.
  CATransform3D perspective = CATransform3DIdentity;
  perspective.m34 = 1.0 / 500.0;
  CATransform3D rotation = CATransform3DRotate(perspective, - M_PI_4, 0, 1, 0);
  _myLayer.transform = rotation;
  // Now we attach the animation.
  [_myLayer addAnimation:self.myAnimation2 forKey:@"animation2"];
  _isShowed = NO;
}


///////////////////////////////////////////////////////////////////////////////////////////////////
- (IBAction)actionPressed:(id)sender {
  if (_isAnimationRunning) return;
  _isShowed ? [self disappear] : [self display];
}


///////////////////////////////////////////////////////////////////////////////////////////////////
- (void)animationDidStop:(CAAnimation *)theAnimation finished:(BOOL)flag {
  _isAnimationRunning = NO;
  NSLog(@"animation stop"); 
}


///////////////////////////////////////////////////////////////////////////////////////////////////
- (void)animationDidStart:(CAAnimation *)theAnimation {
  _isAnimationRunning = YES;
  NSLog(@"animation start");
}


@end