IOS UIView動畫封裝-彈簧

//

//  ViewController.m

//  UIView動畫封裝-彈簧

//

//  Created by dc008 on 15/12/22.

//  Copyright © 2015年 崔曉宇. All rights reserved.

//

#import "ViewController.h"

@interface ViewController ()

{

    UIImageView *_imageView;

}

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    _imageView = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"ball"]];

    _imageView.center = CGPointMake(375/2.0, 667/2.0);

    [self.view addSubview:_imageView];

}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{

    UITouch *touch = [touches anyObject];

    CGPoint location = [touch locationInView:self.view];

    //建立彈性動畫

    //阻尼:返回0-1,越接近0,彈性效果越明顯

    //velocity:彈性復原速度

    //

    [UIView animateWithDuration:5.0 delay:0 usingSpringWithDamping:0.1 initialSpringVelocity:1.0 options:UIViewAnimationOptionCurveLinear animations:^{

        _imageView.center = location;//最終小球位置

    } completion:nil];

    

    

    

    

    

    

}

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

@end