圖層動畫

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController{

    CALayer* layer1;

    CALayer* layer2;

    CALayer* layer3;

    //目前的轉置矩陣

    CATransform3D currentTransform;

}

@property (retain, nonatomic) IBOutlet UIView *bgLayer;

- (IBAction)onYellowUp:(id)sender;

- (IBAction)onGreenUp:(id)sender;

- (IBAction)onRotateY:(id)sender;

@end

#import "ViewController.h"

#import <QuartzCore/QuartzCore.h>

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad

{

    [super viewDidLoad];

[self setupCALayer];

    // Do any additional setup after loading the view, typically from a nib.

}

-(void)setupCALayer{

    layer1 =[[CALayer layer]retain];

    layer1.bounds = CGRectMake(0, 0, 100, 100);

    layer1.position = CGPointMake(100, 100);

    layer1.borderColor = [UIColor redColor].CGColor;

    layer1.borderWidth = 10;

    layer1.backgroundColor = [UIColor yellowColor].CGColor;

    layer1.cornerRadius = 15;

    layer1.opacity = 0.8;

    [self.bgLayer.layer addSublayer:layer1];

    

    layer2 =[[CALayer layer]retain];

    layer2.bounds = CGRectMake(0, 0, 100, 100);

    layer2.position = CGPointMake(120, 120);

    layer2.borderColor = [UIColor blueColor].CGColor;

    layer2.borderWidth = 10;

    layer2.backgroundColor = [UIColor greenColor].CGColor;

    layer2.cornerRadius = 15;

    layer2.opacity = 0.8;

    [self.bgLayer.layer addSublayer:layer2];

    

    //增加z軸

    layer2.zPosition = -5;

    

    //模擬3D動畫

    CATransform3D identity = CATransform3DIdentity;

    identity.m34 = 1/-50;

    self.bgLayer.layer.sublayerTransform = identity;

    currentTransform = identity;

}

- (void)didReceiveMemoryWarning

{

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

- (void)dealloc {

    [_bgLayer release];

    [super dealloc];

}

- (IBAction)onYellowUp:(id)sender {

    layer1.zPosition = 0;

    layer2.zPosition = -5;

}

- (IBAction)onGreenUp:(id)sender {

    layer1.zPosition = -5;

    layer2.zPosition = 0;

}

- (IBAction)onRotateY:(id)sender {

    CABasicAnimation* rotate = [CABasicAnimation animationWithKeyPath:@"sublayerTransform"];

    

    CATransform3D newTransform = CATransform3DRotate(currentTransform, M_PI/6, 0, 1, 0);

    rotate.toValue = [NSValue valueWithCATransform3D:newTransform];

    rotate.duration = 2;

    rotate.fillMode = kCAFillModeBoth;

    rotate.removedOnCompletion = NO;

    [self.bgLayer.layer addAnimation:rotate forKey:nil];

    currentTransform = newTransform;

}

@end