SPEasingCurves

SPEasingCurves are just some timing functions from easings.net that you can use in your CoreAnimation and Pop animations.

If you want to use it with Pop, you'll probably need at least 1.0.7 version, which includes a fix I submitted for timing functions that exceeds 1.0 that made the animation to stop prematurely.

Install SPEasingCurves

1. Using CocoaPods

Add SPEasingCurves to your Podfile:

platform :ios, "6.0"
pod 'SPEasingCurves'

Run the following command:

pod install

2. Manually

Copy both SPEasingCurves.h and SPEasingCurves.m files into your project or add this repo as a submodule and then drag the whole SPEasingCurves folder to your project.

Then, you can simply do:

```objective-c
#import "SPEasingCurves.h"
```

Usage of SPEasingCurves

There is an enum with all the available easing curves in SPEasingCurves.h:

typedef NS_ENUM(NSInteger, SPEasingCurve) {
    SPEasingCurveEaseInSine,
    SPEasingCurveEaseOutSine,
    SPEasingCurveEaseInOutSine,
    SPEasingCurveEaseInQuad,
    SPEasingCurveEaseOutQuad,
    SPEasingCurveEaseInOutQuad,
    SPEasingCurveEaseInCubic,
    SPEasingCurveEaseOutCubic,
    SPEasingCurveEaseInOutCubic,
    SPEasingCurveEaseInQuart,
    SPEasingCurveEaseOutQuart,
    SPEasingCurveEaseInOutQuart,
    SPEasingCurveEaseInQuint,
    SPEasingCurveEaseOutQuint,
    SPEasingCurveEaseInOutQuint,
    SPEasingCurveEaseInExpo,
    SPEasingCurveEaseOutExpo,
    SPEasingCurveEaseInOutExpo,
    SPEasingCurveEaseInCirc,
    SPEasingCurveEaseOutCirc,
    SPEasingCurveEaseInOutCirc,
    SPEasingCurveEaseInBack,
    SPEasingCurveEaseOutBack,
    SPEasingCurveEaseInOutBack,
    SPEasingCurveCount
};

Then you have the class method timingFunctionForEasingCurve: of class SPEasingCurves that given a value of the previous enum, returns a proper timing function that can be used in an animation.

With CoreAnimation animations

Just set the proper timing function in your animation:

CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"position.x"];
animation.fromValue = @(0.f);
animation.toValue = @(200.f);
animation.duration = 1.f;
animation.timingFunction = [SPEasingCurves timingFunctionForEasingCurve:SPEasingCurveEaseInOutBack];
[self.animatingView.layer addAnimation:animation forKey:@"myAnimation"];

With Pop animations

It's exactly the same but with POPAnimation instances:

POPBasicAnimation *animation = [POPBasicAnimation animationWithPropertyNamed:kPOPViewFrame];
animation.fromValue = @(0.f);
animation.toValue = @(200.f);
animation.duration = 1.f;
animation.timingFunction = [SPEasingCurves timingFunctionForEasingCurve:SPEasingCurveEaseInOutBack];
[self.animatingView pop_addAnimation:animation forKey:@"myAnimation"];

Contact

SPEasingCurves was created by Sergio Padrino: @sergiou87, based on easing curves from easings.net.

Contributing

If you want to contribute to the project just follow this steps:

1. Fork the repository.
2. Clone your fork to your local machine.
3. Create your feature branch.
4. Commit your changes, push to your fork and submit a pull request.

License

SPEasingCurves is available under the MIT license. See the LICENSE file for more info.