iOS:核心动画之动画组CAAnimationGroup

#import "ViewController.h"

@interface ViewController ()
@property (strong,nonatomic)CALayer *subLayer; //声明核心动画子层
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    //创建子层
    self.subLayer = [CALayer layer];
    self.subLayer.bounds = CGRectMake(100, 100, 100, 100);
    self.subLayer.position = CGPointMake(100, 100);
    self.subLayer.backgroundColor = [[UIColor redColor]CGColor];
    [self.view.layer addSublayer:self.subLayer];
    
    
    
    //添加触摸手势
    UITapGestureRecognizer  *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tap:)];
    tap.numberOfTapsRequired = 1;
    tap.numberOfTouchesRequired = 1;
    [self.view addGestureRecognizer:tap];
}

#pragma mark 返回一个实现旋转的基本动画
-(CABasicAnimation*)rotationAnimationFromValue:(CGFloat)fromValue toValue:(CGFloat)tovalue
{
    //创建基本动画(用于旋转)
    CABasicAnimation *baseAnimation = [[CABasicAnimation alloc]init];
    
    //设置形变属性值为旋转属性值
    baseAnimation.keyPath = @"transform.rotation.z";
    
    //设置旋转初值
    baseAnimation.fromValue = @(fromValue);
    
    //设置旋转终值
    baseAnimation.toValue = @(tovalue);
    
    //设置旋转动画持续时间
    baseAnimation.duration = 1.0f;
    
    
    //设置动画旋转结束后不恢复原状
    baseAnimation.removedOnCompletion = NO;
    baseAnimation.fillMode = kCAFillModeForwards;
    
    return baseAnimation;
}

#pragma mark 返回一个实现放缩的基本动画
-(CABasicAnimation*)scaleAnimationFromValue:(CGFloat)fromValue toValue:(CGFloat)tovalue
{
    //创建基本动画(用于放缩)
    CABasicAnimation *animScale = [[CABasicAnimation alloc]init];
    
    //设置形变属性为放缩属性值
    animScale.keyPath = @"transform.scale";
    
    //设置放缩初值
    animScale.fromValue = @(fromValue);
    
    //设置放缩终值
    animScale.toValue = @(tovalue);
    
    //设置放缩动画持续时间
    animScale.duration = 1.0f;
    
    //设置动画放缩结束后不恢复原状
    animScale.removedOnCompletion = NO;
    animScale.fillMode = kCAFillModeForwards;
    
    return animScale;
}

#pragma mark -tap触摸事件
-(void)tap:(UITapGestureRecognizer *)sender
{

    //方式一：依次调用各个的动画,效果也是可以的
    //旋转360度
    //[self.subLayer addAnimation:[self rotationAnimationFromValue:-M_PI toValue:M_PI] forKey:@"baseAnimation"];
   
    //放大2倍
    //[self.subLayer addAnimation:[self scaleAnimationFromValue:1.0 toValue:2.0] forKey:@"animScale"];
    
    
    //方式二：并发执行动画组中的所有动画
    //创建动画组
    CAAnimationGroup *Group = [[CAAnimationGroup alloc]init];
    
    //将各种动画对象加入数组中
    NSArray *animations = @[[self rotationAnimationFromValue:-M_PI toValue:M_PI],[self scaleAnimationFromValue:1.0 toValue:2.0]];
    
    
    //动画数组中的动画的属性受动画组的统一控制
    Group.animations = animations;
    
    //设置动画组中所有动画的持续时间
    Group.duration = 1.0;
    
    //设置动画组中所有动画运行结束后不恢复原状
    Group.removedOnCompletion = NO;
    Group.fillMode = kCAFillModeForwards;
    
    //往子层中添加动画组
    [self.subLayer addAnimation:Group forKey:@"Group"];
}