CASpringAnimation的使用

CASpringAnimation的使用

效果

源码

https://github.com/YouXianMing/Animations

//
//  CASpringAnimationController.m
//  Animations
//
//  Created by YouXianMing on 16/1/19.
//  Copyright © 2016年 YouXianMing. All rights reserved.
//

#import "CASpringAnimationController.h"
#import "RangeValueView.h"
#import "WxHxD.h"
#import "UIView+SetRect.h"

@interface CASpringAnimationController ()

@property (nonatomic, strong) UIButton       *showView;

@property (nonatomic, strong) RangeValueView *stiffnessView;
@property (nonatomic, strong) RangeValueView *dampingView;
@property (nonatomic, strong) RangeValueView *massView;
@property (nonatomic, strong) RangeValueView *initialVelocityView;

@end

@implementation CASpringAnimationController

- (void)setup {

    [super setup];

    [self initRangeViews];

    [self initButton];
}

- (void)initButton {

    CGFloat gap = Height -  - * - ;

    CGFloat width                    = .f;
    self.showView                    = [[UIButton alloc] initWithFrame:CGRectMake(, , width, width)];
    self.showView.center             = CGPointMake(self.contentView.middleX,  + gap / .f);
    self.showView.backgroundColor    = [UIColor cyanColor];
    self.showView.layer.cornerRadius = width / .f;
    self.showView.x                  = Width / .f - ;
    [self.showView addTarget:self action:@selector(doAnimation) forControlEvents:UIControlEventTouchUpInside];
    [self.contentView addSubview:self.showView];
}

- (void)doAnimation {

    CASpringAnimation *springAnimation = [CASpringAnimation animationWithKeyPath:@"position.x"];
    springAnimation.stiffness          = self.stiffnessView.currentValue;
    springAnimation.mass               = self.massView.currentValue;
    springAnimation.damping            = self.dampingView.currentValue;
    springAnimation.initialVelocity    = self.initialVelocityView.currentValue;
    springAnimation.duration           = springAnimation.settlingDuration;

    springAnimation.fromValue    = @(Width / .f - );
    springAnimation.toValue      = @(Width / .f + );
    self.showView.layer.position = CGPointMake(Width / .f + , self.showView.layer.position.y);

    [self.showView.layer addAnimation:springAnimation forKey:nil];
}

- (void)initRangeViews {

    self.stiffnessView = [RangeValueView rangeValueViewWithFrame:CGRectMake(, Height - , Width - , )
                                                            name:@"硬度  Stiffness"
                                                        minValue:.f
                                                        maxValue:.f
                                                    defaultValue:.f];
    [self.contentView addSubview:self.stiffnessView];

    self.dampingView = [RangeValueView rangeValueViewWithFrame:CGRectMake(, Height -  - , Width - , )
                                                          name:@"阻尼  Damping"
                                                      minValue:0.1f
                                                      maxValue:.f
                                                  defaultValue:.f];
    [self.contentView addSubview:self.dampingView];

    self.massView = [RangeValueView rangeValueViewWithFrame:CGRectMake(, Height -  - *, Width - , )
                                                       name:@"质量  Mass"
                                                   minValue:0.1
                                                   maxValue:.f
                                               defaultValue:.f];
    [self.contentView addSubview:self.massView];

    self.initialVelocityView = [RangeValueView rangeValueViewWithFrame:CGRectMake(, Height -  - *, Width - , )
                                                                  name:@"速度  Velocity"
                                                              minValue:-.f
                                                              maxValue:.f
                                                          defaultValue:.f];
    [self.contentView addSubview:self.initialVelocityView];
}

@end

细节