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MTAnimation

Animate UIView with 25+ timing functions. (Bounce, elastic, exponential, etc.)

Allows you to animate views in your app in the way you're familiar with (e.g. [UIKit animateWithDuration:animations:]) but adds 25+ easing functions (from jQuery) to make your animations more visceral.

Advantages:

  • Methods very similar to Apple's API.
  • No Swizzling or other dangerous nonsense.
  • No need to mess with keypaths, just change the properties on UIView and you're golden.
  • Proper transform matrix interpolation, so rotations look correct.
  • Install with cocoapods.
  • Category method properly prefixed.

HELP NEEDED: The best I can do so far is to require an array of views that are changed in the block. If you know of any way to get from a block references to the objects it captures please let me know.

Installation

In your Podfile, add this line:

pod "MTAnimation"

Then add the import:

#import <UIView+MTAnimation.h>

Preview

Animation Sample

Example App

Clone the repo (or download the zip) and run the iPad demo app to play around.

Example Usage

Similar to the UIKits animation methods but you must supply an array of all the views you will be animating and an easing function.

[UIView mt_animateViews:@[_logoImageView]
           duration:0.25
     timingFunction:kMTEaseOutBack
         animations:^{
             CGRect r               = _logoImageView.frame;
             r.origin.x             = 50;
             _logoImageView.frame   = r;
         }];

You can animate:

  • UIView - frame
  • UIView - bounds
  • UIView - center
  • UIView - alpha
  • UIView - transform (CGAffineTransform)
  • CALayer - transform (CATransform3D)

You can cut an animation into parts (using the range param). You might use this to swap the view half way through a flip animation:

    _logoImageView.image    = [UIImage imageNamed:@"logo"];
    [UIView mt_animateViews:@[_logoImageView]
                   duration:0.25
                    options:0
             timingFunction:kMTEaseOutBack
               exaggeration:MTAnimationExaggerationDefault
                      range:MTMakeAnimationRange(0, 0.135)
                 animations:^{
                    CGFloat radians                 = mt_degreesToRadians(_endRotation);
                    _logoImageView.layer.transform  = CATransform3DMakeRotation(radians, 0, 1, 0);
                 } completion:^{
                     _logoImageView.image = [UIImage imageNamed:@"logo-flip"];
                     [UIView mt_animateViews:@[_logoImageView]
                                    duration:0.25
                                     options:0
                              timingFunction:kMTEaseOutBack
                                exaggeration:MTAnimationExaggerationDefault
                                       range:MTMakeAnimationRange(0.135, 1)
                                  animations:^{
                                      CGFloat radians                 = mt_degreesToRadians(_endRotation);
                                      _logoImageView.layer.transform  = CATransform3DMakeRotation(radians, 0, 1, 0);
                                  } completion:^{
                                  }];
                 }];

This code will animate until the image is sideways, then swap out the image view's image and continue the animation so it looks like it has a backside.

Author

Adam Kirk (@atomkirk)

Contributing

I have TODO: comments on stuff I need some help with, so feel free.

Credits

Inspired by Nocho Soto's NSBKeyframeAnimation Library

Code extracts from Ivan Vu�ica & Amr Aboelela work on CAAnimation

Easing functions from jQuery

License

Copyright (c) 2010 Mysterious Trousers, LLC (http://www.mysterioustrousers.com)

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.