iOS 动画 购物Demo

//

#import "ViewController.h"
#define SCREEN_WIDTH    ([UIScreen mainScreen].bounds.size.width)
#define SCREEN_HEIGHT   ([UIScreen mainScreen].bounds.size.height)

@interface ViewController ()
@property (nonatomic,strong) UIBezierPath *path;
@end

@implementation ViewController{
CALayer     *layer;
UILabel     *_cntLabel;
NSInteger    _cnt;
UIImageView *_imageView;
UIButton    *_btn;
}

- (void)viewDidLoad {
[super viewDidLoad];
_cnt = 0;
[self setUI];

}
-(void)setUI
{
UIColor *customColor  = [UIColor colorWithRed:237/255.0 green:20/255.0 blue:91/255.0 alpha:1.0f];
//
_btn = [UIButton buttonWithType:UIButtonTypeCustom];
_btn.frame = CGRectMake(50, SCREEN_HEIGHT * 0.7, 100, 30);
[_btn setTitle:@"立即抢购" forState:UIControlStateNormal];
[_btn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
_btn.titleLabel.font = [UIFont boldSystemFontOfSize:15];
[_btn setBackgroundImage:[UIImage imageNamed:@"ButtonRedLarge"] forState:UIControlStateNormal];
[_btn addTarget:self action:@selector(startAnimation) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:_btn];
_imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 50, 50)];
_imageView.image = [UIImage imageNamed:@"TabCartSelected@2x.png"];
_imageView.center = CGPointMake(270, 320);
[self.view addSubview:_imageView];
// label
_cntLabel = [[UILabel alloc] initWithFrame:CGRectMake(280, 295, 20, 20)];
_cntLabel.textColor = customColor;
_cntLabel.textAlignment = NSTextAlignmentCenter;
_cntLabel.font = [UIFont boldSystemFontOfSize:13];
_cntLabel.backgroundColor = [UIColor whiteColor];
_cntLabel.layer.cornerRadius = CGRectGetHeight(_cntLabel.bounds)/2;
_cntLabel.layer.masksToBounds = YES;
_cntLabel.layer.borderWidth = 1.0f;
_cntLabel.layer.borderColor = customColor.CGColor;
[self.view addSubview:_cntLabel];
if (_cnt == 0) {
_cntLabel.hidden = YES;
}

self.path = [UIBezierPath bezierPath];
[_path moveToPoint:CGPointMake(50, 150)];
[_path addQuadCurveToPoint:CGPointMake(270, 300) controlPoint:CGPointMake(150, 20)];
}
-(void)startAnimation
{
if (!layer) {
_btn.enabled = NO;
layer = [CALayer layer];
layer.contents = (__bridge id)[UIImage imageNamed:@"test01.jpg"].CGImage;
layer.contentsGravity = kCAGravityResizeAspectFill;
layer.bounds = CGRectMake(0, 0, 50, 50);
[layer setCornerRadius:CGRectGetHeight([layer bounds]) / 2];
layer.masksToBounds = YES;
layer.position =CGPointMake(50, 150);
[self.view.layer addSublayer:layer];
}
[self groupAnimation];
}
-(void)groupAnimation
{
CAKeyframeAnimation *animation = [CAKeyframeAnimation animationWithKeyPath:@"position"];
animation.path = _path.CGPath;
animation.rotationMode = kCAAnimationRotateAuto;
CABasicAnimation *expandAnimation = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
expandAnimation.duration = 0.5f;
expandAnimation.fromValue = [NSNumber numberWithFloat:1];
expandAnimation.toValue = [NSNumber numberWithFloat:2.0f];
expandAnimation.timingFunction=[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn];

CABasicAnimation *narrowAnimation = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
narrowAnimation.beginTime = 0.5;
narrowAnimation.fromValue = [NSNumber numberWithFloat:2.0f];
narrowAnimation.duration = 1.5f;
narrowAnimation.toValue = [NSNumber numberWithFloat:0.5f];

narrowAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut];

CAAnimationGroup *groups = [CAAnimationGroup animation];
groups.animations = @[animation,expandAnimation,narrowAnimation];
groups.duration = 2.0f;
groups.removedOnCompletion=NO;
groups.fillMode=kCAFillModeForwards;
groups.delegate = self;
[layer addAnimation:groups forKey:@"group"];
}

-(void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag
{
//    [anim def];
if (anim == [layer animationForKey:@"group"]) {
_btn.enabled = YES;
[layer removeFromSuperlayer];
layer = nil;
_cnt++;
if (_cnt) {
_cntLabel.hidden = NO;
}
CATransition *animation = [CATransition animation];
animation.duration = 0.25f;
_cntLabel.text = [NSString stringWithFormat:@"%d",_cnt];
[_cntLabel.layer addAnimation:animation forKey:nil];

//        CABasicAnimation *shakeAnimation = [CABasicAnimation animationWithKeyPath:@"transform.translation.y"];
CABasicAnimation *shakeAnimation = [CABasicAnimation animationWithKeyPath:@"transform.translation.x"];
shakeAnimation.duration = 0.25f;

//        shakeAnimation.duration = 0.5f;

shakeAnimation.fromValue = [NSNumber numberWithFloat:-5];
shakeAnimation.toValue = [NSNumber numberWithFloat:5];
shakeAnimation.autoreverses = YES;
[_imageView.layer addAnimation:shakeAnimation forKey:nil];
}
}

@end