TestsTested | ✗ |
LangLanguage | Obj-CObjective C |
License | MIT |
ReleasedLast Release | Apr 2017 |
Maintained by devedbox.
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
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.
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.
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.
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:
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
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
AXAnimationChain
对系统版本支持到iOS8.0
,需要使用到的框架:
Foundation.framework
UIKit.framework
使用的时候最好使用最新版Xcode.
AXAimationChain
To Your ProjectAlternatively you can directly add all the source files to your project.
#import "AXAimationChain.h"
.AXSpringAnimation
或者Convertable
以及TimingControl
等特性,只需要导入#import "AXCoreAnimation.h"
即可.This code is distributed under the terms and conditions of the MIT license.
请参考示例工程代码以及API.
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.
转载需注明出处:http://devedbox.com/AXAnimationChain/