Summary
AXAnimationChain是一个链式动画库
,可以用来轻松的创建基于CAAnimation
的链式动画。链的组合方式有两种,一种是组合,另一种则是链接,通过以上两种方式创建的动画,既可以同时进行,也可以按时间先后进行,可以使用较少的代码创建出丰富复杂的动画效果:
简单使用:
_transitionView.spring.centerBy(CGPointMake(0, 100)).easeOut.spring.sizeBy(CGSizeMake(100, 100)).spring.cornerRadiusBy(4).animate();
高级使用:
_transitionView.chainAnimator.basic.target(self).complete(@selector(complete:)).property(@"position").toValue([NSValue valueWithCGPoint:CGPointMake(100, self.view.center.y)]).easeInBack.duration(0.5).combineSpring.target(self).complete(@selector(complete:)).property(@"bounds").toValue([NSValue valueWithCGRect:CGRectMake(0, 0, 100, 100)]).duration(0.5).repeatCount(5).autoreverses.combineSpring.target(self).complete(@selector(complete:)).property(@"transform.rotation").toValue(@(M_PI_4)).duration(0.5).repeatCount(3).beginTime(1.0).autoreverses.nextToBasic.property(@"position").toValue([NSValue valueWithCGPoint:self.view.center]).duration(0.5).combineSpring.property(@"bounds").toValue([NSValue valueWithCGRect:CGRectMake(0, 0, 100, 100)]).duration(0.8).nextToBasic.property(@"transform.rotation").toValue(@(M_PI_4)).duration(1.0).completeWithBlock(nil).animate();
看起来比较冗余,但是细读会发现,其实就只有一行代码.
链接和组合在协议AXAnimatorChainDelegate
中进行定义,分别是:nextTo:
和combineWith:
,在使用的过程中应当予以区分.
AXAnimationChain
基于CoreAnimation
定义了几种Animator
,AXChainAnimator
是基类,预定义了一系列Animate
操作,可以链接、组合并且控制动画完成的回调:
AXChainAnimator
--AXBasicChainAnimator ==CABasicAnimation
--AXSpringChainAnimator ==CASpringAnimation
--AXKeyframeChainAnimator ==CAKeyframeAnimation
--AXTransitionChainAnimator==CATransitionAnimation
Next-To
通过链接的方式处理两个animator
,被链接的animator
将会在前者动画(包含组合
的动画)完成之后进行动画, 大概的示例如下:
[former nextTo:nexter];
Next-To
方法的原型如下:
- (instancetype)nextTo:(id<AXAnimatorChainDelegate>)animator;
当向former aniamtor
发送nextTo:
消息之后,返回的是nexter animator
作为下次链接或者组合操作的对象,因此AXAnimationChain
定义了几种常用的操作:
/// 链接到Basic动画并且返回链接的Basic动画.
- (AXBasicChainAnimator *)nextToBasic;
/// 链接到Spring动画并且放回链接的Spring动画.
- (AXSpringChainAnimator *)nextToSpring;
/// 链接到Keyframe动画并且放回链接的Keyframe动画.
- (AXKeyframeChainAnimator *)nextToKeyframe;
/// 链接到Transition动画并且返回链接的Transition动画.
- (AXTransitionChainAnimator *)nextToTransition;
在发送消息之后分别返回对应类型的可操作对象.
Combine-With
通过组合的方式处理两个animator
,被组合的animator
将会与前者动画同时进行,完成的时间以时间最长的为准, 示例如下:
[former combineWith:combiner];
Combine-With
方法原型如下:
- (instancetype)combineWith:(nonnull AXChainAnimator *)animator;
当向former animator
发送combineWith:
消息之后,返回的是combiner animator
作为下次链接或者组合操作的对象,在AXAnimationChain
中,默认一下几种组合方式:
/// 组合到Basic动画并且返回组合的Basic动画.
- (AXBasicChainAnimator *)combineBasic;
/// 组合到Spring动画并且放回组合的Spring动画.
- (AXSpringChainAnimator *)combineSpring;
/// 组合到Keyframe动画并且放回组合的Keyframe动画.
- (AXKeyframeChainAnimator *)combineKeyframe;
/// 组合到Transition动画并且返回组合的Transition动画.
- (AXTransitionChainAnimator *)combineTransition;
同样的,在向某一操作对象animator
发送以上消息之后,将会分别返回对应类型的可操作对象.
Relationship
在AXAnimationChain
中,关系的管理采用的是二叉树的理论. 某一个animator
对应的类结构中,包含了指向父节点的superAnimator
用于表示父animator
, 表示此animator
为superAnimator
所链接的animator
, 此时,superAnimator
的childAnimator
即指向此animator
作为一个闭环链将两者的关系锁定起来; 同样的,某一个animator
还拥有一个指向兄弟节点的NSArray<AXChainAnimator *>
结构:combinedAnimators
用于管理所组合的animators
,并且,被组合的animator
的父节点superAnimator
则指向当前animator
.
- (void)start {
NSAssert(_animatedView, @"Animation chain cannot be created because animated view is null.");
AXChainAnimator *superAnimator = _superAnimator;
AXChainAnimator *superSuperAnimator = _superAnimator;
while (superAnimator) {
superAnimator = superAnimator.superAnimator;
if (superAnimator) {
superSuperAnimator = superAnimator;
}
}
if (superSuperAnimator) {
[superSuperAnimator start];
} else {
[self _beginAnimating];
if (!_childAnimator) [self _clear];
}
}
AXAnimatioChain
就是通过这样的关系把所有链接和组合的animator
管理起来的,在完成关系的链接或组合之后,需要向最后一个animator
发送-start
消息动画才能正常进行. animator
在接收到-start
消息之后,会逐级遍历superAnimator
直至superAnimator.superAnimator==nil
, 此时获取到superSuperAnimator
, 从superSuperAnimator
自祖先往下逐级进行动画,组合的动画会同时进行,链接的动画则按顺序进行.
Features
轻量级解决方案
基于CoreAnimation的封装,安全、高效!
一行代码搞定复杂的动画管理,提高代码维护效
TimingControl
时间曲线,时间曲线用于描述动画随时间进行的速度,AXAnimationChain
除了包含系统默认的时间曲线之外,还提供了如下的曲线以呈现更漂亮的动画:
AXSpringAnimation
CoreAnimation
自iOS2.0
就为iOS平台提供了核心动画的支持,但是在iOS9.0之前,一直没有Spring
动画,要使用Spring
动画要么使用第三方动画库,要么使用系统提供的方法:
+ (void)animateWithDuration:(NSTimeInterval)duration delay:(NSTimeInterval)delay usingSpringWithDamping:(CGFloat)dampingRatio initialSpringVelocity:(CGFloat)velocity options:(UIViewAnimationOptions)options animations:(void (^)(void))animations completion:(void (^ __nullable)(BOOL finished))completion NS_AVAILABLE_IOS(7_0);
但是系统提供的这个方法也是iOS7.0
以后才能使用了,并且在控制上并非那么容易.
AXSpringAnimation
是基于阻尼震动运动模型的Spring
动画类,能够完美与CASpringAnimation
相通用:
动画中,左边正方形使用的是CASpringAnimation
类,右边的则使用的是AXSpringAnimation
,两者的动画曲线是一致的.
同样地,AXSpringAnimation
的API和CASpringAnimation
也是一致的:
@interface AXSpringAnimation : CAKeyframeAnimation
/* The mass of the object attached to the end of the spring. Must be greater
than 0. Defaults to one. */
@property(assign, nonatomic) CGFloat mass;
/* The spring stiffness coefficient. Must be greater than 0.
* Defaults to 100. */
@property(assign, nonatomic) CGFloat stiffness;
/* The damping coefficient. Must be greater than or equal to 0.
* Defaults to 10. */
@property(assign, nonatomic) CGFloat damping;
/* The initial velocity of the object attached to the spring. Defaults
* to zero, which represents an unmoving object. Negative values
* represent the object moving away from the spring attachment point,
* positive values represent the object moving towards the spring
* attachment point. */
@property(assign, nonatomic) CGFloat initialVelocity;
/* Returns the estimated duration required for the spring system to be
* considered at rest. The duration is evaluated for the current animation
* parameters. */
@property(readonly, nonatomic) CFTimeInterval settlingDuration;
/* The objects defining the property values being interpolated between.
* All are optional, and no more than two should be non-nil. The object
* type should match the type of the property being animated (using the
* standard rules described in CALayer.h). The supported modes of
* animation are:
*
* - both `fromValue' and `toValue' non-nil. Interpolates between
* `fromValue' and `toValue'.
*
* - `fromValue' and `byValue' non-nil. Interpolates between
* `fromValue' and `fromValue' plus `byValue'.
*
* - `byValue' and `toValue' non-nil. Interpolates between `toValue'
* minus `byValue' and `toValue'. */
@property(nullable, strong, nonatomic) id fromValue;
@property(nullable, strong, nonatomic) id toValue;
@property(nullable, strong, nonatomic) id byValue;
@end
Convertable
AXAnimationChain
框架还提供了将CABasicAnimation
无缝转换为CAKeyframeAnimation
的功能:
动画中,左边是CABasicAnimation
,右边是CAKeyframeAnimation
,两者对应的动画曲线是一致的.
要使用动画转换,请参考:
#import <QuartzCore/QuartzCore.h>
#import <UIKit/UIKit.h>
#import "CAMediaTimingFunction+Extends.h"
@interface CAAnimation (Convertable)
@end
@interface CAKeyframeAnimation (Convertable)
+ (instancetype)animationWithBasic:(CABasicAnimation *)basicAnimation;
+ (instancetype)animationWithBasic:(CABasicAnimation *)basicAnimation usingValuesFunction:(double (^)(double t, double b, double c, double d))valuesFunction;
@end
Requirements
AXAnimationChain
对系统版本支持到iOS8.0
,需要使用到的框架:
Foundation.framework
UIKit.framework
QuartzCore.framework
使用的时候最好使用最新版Xcode.
Adding AXAimationChain
To Your Project
CocoaPods
CocoaPods) is the recommended way to add AXAimationChain to your project.
Add a pod entry for AXAimationChain to your Podfile
pod 'AXAimationChain', '~> 0.1.0'
Install the pod(s) by running
pod install
.Include AXAimationChain wherever you need it with
#import "AXAimationChain.h"
.若需要单独使用
AXSpringAnimation
或者Convertable
以及TimingControl
等特性的话,只需要将podfile里边AXAnimationChain
替换为AXAnimationChain/CoreAnimation
即可,即:pod 'AXAimationChain/CoreAnimation', '~> 0.1.0'
.
Source files
Alternatively you can directly add all the source files to your project.
Download the latest code version) or add the repository as a git submodule to your git-tracked project.
Open your project in Xcode, then drag and drop the source group onto your project (use the "Product Navigator view"). Make sure to select Copy items when asked if you extracted the code archive outside of your project.
Include AXAnimationChain wherever you need it with
#import "AXAimationChain.h"
.如单独使用
AXSpringAnimation
或者Convertable
以及TimingControl
等特性,只需要导入#import "AXCoreAnimation.h"
即可.
License
This code is distributed under the terms and conditions of the MIT license.
使用
请参考示例工程代码以及API.
不足
此项目在开展的时候比较庞大,基础的核心类已经构建好了,基本目标已经达成,但是还有很多需要完善的地方,后边会逐步完善并发布Release版本.
声明
转载需注明出处:http://devedbox.com/AXAnimationChain/
**粗体** _斜体_ [链接](http://example.com) `代码` - 列表 > 引用
。你还可以使用@
来通知其他用户。