CAMediaTiming`协议(9.1 图层时间)

 1 @interface ViewController ()
 2 
 3 @property (nonatomic, weak) IBOutlet UIView *containerView;
 4 @property (nonatomic, weak) IBOutlet UITextField *durationField;
 5 @property (nonatomic, weak) IBOutlet UITextField *repeatField;
 6 @property (nonatomic, weak) IBOutlet UIButton *startButton;
 7 @property (nonatomic, strong) CALayer *shipLayer;
 8 
 9 @end
10 
11 @implementation ViewController
12 
13 - (void)viewDidLoad
14 {
15     [super viewDidLoad];
16     //add the ship
17     self.shipLayer = [CALayer layer];
18     self.shipLayer.frame = CGRectMake(0, 0, 128, 128);
19     self.shipLayer.position = CGPointMake(150, 150);
20     self.shipLayer.contents = (__bridge id)[UIImage imageNamed: @"Ship.png"].CGImage;
21     [self.containerView.layer addSublayer:self.shipLayer];
22 }
23 
24 - (void)setControlsEnabled:(BOOL)enabled
25 {
26     for (UIControl *control in @[self.durationField, self.repeatField, self.startButton]) {
27         control.enabled = enabled;
28         control.alpha = enabled? 1.0f: 0.25f;
29     }
30 }
31 
32 - (IBAction)hideKeyboard
33 {
34     ?[self.durationField resignFirstResponder];
35     [self.repeatField resignFirstResponder];
36 }
37 
38 - (IBAction)start
39 {
40     CFTimeInterval duration = [self.durationField.text doubleValue];
41     float repeatCount = [self.repeatField.text floatValue];
42     //animate the ship rotation
43     CABasicAnimation *animation = [CABasicAnimation animation];
44     animation.keyPath = @"transform.rotation";
45     animation.duration = duration;
46     animation.repeatCount = repeatCount;
47     animation.byValue = @(M_PI * 2);
48     animation.delegate = self;
49     [self.shipLayer addAnimation:animation forKey:@"rotateAnimation"];
50     //disable controls
51     [self setControlsEnabled:NO];
52 }
53 
54 - (void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag
55 {
56     //reenable controls
57     [self setControlsEnabled:YES];
58 }
59 
60 @end

@interface ViewController ()

@property (nonatomic, weak) UIView *containerView;

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    //add the door
    CALayer *doorLayer = [CALayer layer];
    doorLayer.frame = CGRectMake(0, 0, 128, 256);
    doorLayer.position = CGPointMake(150 - 64, 150);
    doorLayer.anchorPoint = CGPointMake(0, 0.5);
    doorLayer.contents = (__bridge id)[UIImage imageNamed: @"Door.png"].CGImage;
    [self.containerView.layer addSublayer:doorLayer];
    //apply perspective transform
    CATransform3D perspective = CATransform3DIdentity;
    perspective.m34 = -1.0 / 500.0;
    self.containerView.layer.sublayerTransform = perspective;
    //apply swinging animation
    CABasicAnimation *animation = [CABasicAnimation animation];
    animation.keyPath = @"transform.rotation.y";
    animation.toValue = @(-M_PI_2);
    animation.duration = 2.0;
    animation.repeatDuration = INFINITY;
    animation.autoreverses = YES;
    [doorLayer addAnimation:animation forKey:nil];
}

@end

 1 @interface ViewController ()
 2 
 3 @property (nonatomic, weak) IBOutlet UIView *containerView;
 4 @property (nonatomic, weak) IBOutlet UILabel *speedLabel;
 5 @property (nonatomic, weak) IBOutlet UILabel *timeOffsetLabel;
 6 @property (nonatomic, weak) IBOutlet UISlider *speedSlider;
 7 @property (nonatomic, weak) IBOutlet UISlider *timeOffsetSlider;
 8 @property (nonatomic, strong) UIBezierPath *bezierPath;
 9 @property (nonatomic, strong) CALayer *shipLayer;
10 
11 @end
12 
13 @implementation ViewController
14 
15 - (void)viewDidLoad
16 {
17     [super viewDidLoad];
18     //create a path
19     self.bezierPath = [[UIBezierPath alloc] init];
20     [self.bezierPath moveToPoint:CGPointMake(0, 150)];
21     [self.bezierPath addCurveToPoint:CGPointMake(300, 150) controlPoint1:CGPointMake(75, 0) controlPoint2:CGPointMake(225, 300)];
22     //draw the path using a CAShapeLayer
23     CAShapeLayer *pathLayer = [CAShapeLayer layer];
24     pathLayer.path = self.bezierPath.CGPath;
25     pathLayer.fillColor = [UIColor clearColor].CGColor;
26     pathLayer.strokeColor = [UIColor redColor].CGColor;
27     pathLayer.lineWidth = 3.0f;
28     [self.containerView.layer addSublayer:pathLayer];
29     //add the ship
30     self.shipLayer = [CALayer layer];
31     self.shipLayer.frame = CGRectMake(0, 0, 64, 64);
32     self.shipLayer.position = CGPointMake(0, 150);
33     self.shipLayer.contents = (__bridge id)[UIImage imageNamed: @"Ship.png"].CGImage;
34     [self.containerView.layer addSublayer:self.shipLayer];
35     //set initial values
36     [self updateSliders];
37 }
38 
39 - (IBAction)updateSliders
40 {
41     CFTimeInterval timeOffset = self.timeOffsetSlider.value;
42     self.timeOffsetLabel.text = [NSString stringWithFormat:@"%0.2f", timeOffset];
43     float speed = self.speedSlider.value;
44     self.speedLabel.text = [NSString stringWithFormat:@"%0.2f", speed];
45 }
46 
47 - (IBAction)play
48 {
49     //create the keyframe animation
50     CAKeyframeAnimation *animation = [CAKeyframeAnimation animation];
51     animation.keyPath = @"position";
52     animation.timeOffset = self.timeOffsetSlider.value;
53     animation.speed = self.speedSlider.value;
54     animation.duration = 1.0;
55     animation.path = self.bezierPath.CGPath;
56     animation.rotationMode = kCAAnimationRotateAuto;
57     animation.removedOnCompletion = NO;
58     [self.shipLayer addAnimation:animation forKey:@"slide"];
59 }
60 
61 @end