Core Animationコアアニメーション使用

@interface ViewController ()
@property (nonatomic, weak) CALayer *layer;
//位置を変更するためのボタン
@property (nonatomic, weak) UIButton *button;

(void)viewDidLoad { [super viewDidLoad]; [self setupLayer];

}
pragma mark-コアアニメーション直接修正layer-(void)setupLayer{

// MARK: - 1.  layer    
// 1.  
CALayer *layer = [CALayer layer];

// 2.    ,      
layer.backgroundColor = [UIColor yellowColor].CGColor;
// bounds         frame        
layer.bounds = CGRectMake(0, 0, 150, 150);
layer.position = CGPointMake(200, 300);

// 3.  
[self.view.layer addSublayer:layer];

// 4.  
_layer = layer;

}
//方法-(void)demoLayer 1{

// MARK: - 1.    
// 1.        
CABasicAnimation *anim = [CABasicAnimation animationWithKeyPath:@"position.y"];


//    0.25″,    
anim.duration = 3;

// 2.    
anim.toValue = @200;
anim.byValue = @300;

// 2.2         
anim.removedOnCompletion = NO;
anim.fillMode = kCAFillModeForwards;


// 3.   layer 
[self.layer addAnimation:anim forKey:nil];

} -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { [self demoLayer3]; }
pragma mark-回転-(void)demoLayer 3{

CABasicAnimation*animation=[CABasicAnimation animation animation WithKeyPath:@"transform.rotation.z";anim.duration=2;

属性anim.toValue=@(M_PI*2*5);

[self.layer addAnimation:animforKey:nil];

を追加
}
-(void)demoLayer2 {

コアアニメーションCABasicAnimation*animation=[CABasicAnimation animation animation WithKeyPath:@"bounds.size";

アニメーション属性anim.toValue=[NSValue valueWithCGSize:CGSizeMake(500,500)];//anim.duration=0.5;anim.repeatCount=CGFLOAT_MAX;

layerに追加[self.layer addAnimation:animforKey:nil];

}