//

//  ViewController.m

//  CoreAnimation

//

//  Created by XianMingYou on 15/4/13.

//  Copyright (c) 2015年 XianMingYou. All rights reserved.

//

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    // 初始化layer

    CALayer *layer        = [CALayer layer];

    layer.frame           = CGRectMake(, , , );

    layer.backgroundColor = [UIColor blackColor].CGColor;

    // 终点位置

    CGPoint endPosition = CGPointMake(layer.position.x, layer.position.y + );

    // 动画

    CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"position"];

    animation.fromValue         = [NSValue valueWithCGPoint:layer.position];

    animation.toValue           = [NSValue valueWithCGPoint:endPosition];

    animation.timingFunction    = [CAMediaTimingFunction functionWithControlPoints:0.20 :0.03 :0.13 :1.00];

    layer.position              = endPosition;

    animation.duration          = .f;

    // 添加动画

    [layer addAnimation:animation forKey:nil];

    // 添加layer

    [self.view.layer addSublayer:layer];

}

@end