弹性动画--哟底部弹出俩球

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//
//  ViewController.m
//  dongjifen
//
//  Created by 王木木 on 2018/6/6.
//  Copyright © 2018年 wangmumu. All rights reserved.
//
#define sheight [UIScreen mainScreen].bounds.size.height
#define swidth [UIScreen mainScreen].bounds.size.width
#import "ViewController.h"

@interface ViewController ()

@property (nonatomic,strong) UILabel *dotView;
@property (nonatomic,strong) UILabel *dotView1;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
    
    button.backgroundColor = [UIColor redColor];
    
    [self.view addSubview:button];
    [button addTarget:self action:@selector(touchbutton) forControlEvents:UIControlEventTouchUpInside];
    
    self.dotView = [[UILabel alloc] init];
    self.dotView.text = @"111";
    self.dotView.backgroundColor = [UIColor brownColor];
    self.dotView.frame = CGRectMake((swidth-50)/2, sheight, 50, 50);
    self.dotView.layer.cornerRadius = 25;
    self.dotView.layer.masksToBounds = YES;
    [self.view addSubview:self.dotView];
    self.dotView1 = [[UILabel alloc] init];
    
    self.dotView1.backgroundColor = [UIColor brownColor];
    self.dotView1.text = @"111";
    self.dotView1.frame = CGRectMake((swidth-50)/2, sheight, 50, 50);
    self.dotView1.layer.cornerRadius = 25;
    self.dotView1.layer.masksToBounds = YES;
    [self.view addSubview:self.dotView1];
    
    
}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
 
    [UIView animateWithDuration:0.5
                          delay:0
         usingSpringWithDamping:1
          initialSpringVelocity:30
                        options:UIViewAnimationOptionCurveEaseInOut
                     animations:^{
                         self.dotView.frame = CGRectMake((swidth-50)/2 - 50, sheight/2, 50, 50);
                         
                     }
                     completion:^(BOOL finished) {
                         
                     }
     ];
    
    [UIView animateWithDuration:0.5
                          delay:0.1
         usingSpringWithDamping:1
          initialSpringVelocity:30
                        options:UIViewAnimationOptionCurveEaseInOut
                     animations:^{
                         
                         self.dotView1.frame = CGRectMake((swidth-50)/2 + 50, sheight/2, 50, 50);
                     }
                     completion:^(BOOL finished) {
                         
                     }
     ];
    
}

- (void)touchbutton {
    [UIView animateWithDuration:1
                          delay:0
         usingSpringWithDamping:50
          initialSpringVelocity:0
                        options:UIViewAnimationOptionCurveLinear
                     animations:^{
                         self.dotView.frame = CGRectMake((swidth-50)/2, sheight, 50, 50);
                      
                     }
                     completion:^(BOOL finished) {
                         
                     }
     ];
    
    [UIView animateWithDuration:1
                          delay:0.1
         usingSpringWithDamping:50
          initialSpringVelocity:0
                        options:UIViewAnimationOptionCurveLinear
                     animations:^{
                         
                         self.dotView1.frame = CGRectMake((swidth-50)/2, sheight, 50, 50);
                     }
                     completion:^(BOOL finished) {
                         
                     }
     ];
    
}

@end