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曾经，笔者对动画一无所知，当他人问起时，总是似懂非懂。每一次别人说起动画效果时，笔者都不好意思插话，因此懂得太少，只是会使用UIView的那几个添加动画的方法。现在，不再等待，一步一步地学习其基础知识并开始尝试写一些常用的动画效果。
如果您也一样迷茫，那就不要迷茫了，实践出真知！！！
我们直接看官方声明：
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/** Transition animation subclass. **/
@interface CATransition : CAAnimation
/* The name of the transition. Current legal transition types include
* `fade‘, `moveIn‘, `push‘ and `reveal‘. Defaults to `fade‘. */
@property(copy) NSString *type;
/* An optional subtype for the transition. E.g. used to specify the
* transition direction for motion-based transitions, in which case
* the legal values are `fromLeft‘, `fromRight‘, `fromTop‘ and
* `fromBottom‘. */
@property(nullable, copy) NSString *subtype;
/* The amount of progress through to the transition at which to begin
* and end execution. Legal values are numbers in the range [0,1].
* `endProgress‘ must be greater than or equal to `startProgress‘.
* Default values are 0 and 1 respectively. */
@property float startProgress;
@property float endProgress;
/* An optional filter object implementing the transition. When set the
* `type‘ and `subtype‘ properties are ignored. The filter must
* implement `inputImage‘, `inputTargetImage‘ and `inputTime‘ input
* keys, and the `outputImage‘ output key. Optionally it may support
* the `inputExtent‘ key, which will be set to a rectangle describing
* the region in which the transition should run. Defaults to nil. */
@property(nullable, strong) id filter;
@end
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CATransition类继承于CAAnimation类，提供的是过滤的效果，如push、fade、reveal等。
type属性是用于指定效果类型，当前官方提供的效果有fade, moveIn, push和reveal. 默认为fade。对于其它类型，如cube立体效果这种官方没有公开，也不清楚是否是使用私有。
subtype属性是可选的，主要用于指定动画的方向。比如动作类动画效果中，有从左边进入、从右边进入等效果。
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@property float startProgress;
@property float endProgress;
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这两个属性可以设置动画动作的进度，默认为0->1。
filter属性默认为nil，一旦设置了此属性，type和subtype就会被忽略。 这个属性意思就是滤镜的意思吧，它需要实现inputImage、inputTargetImage、inputTime、outputImage，当然还有一个可选的inputExtent，不要求实现。
更多基础知识，请参考：CAAnimation精讲
先看看我们做效果图：
常用的transition动画几乎都有了，而且笔者在学习的同时，也这将些动画封装成了一个类方法，只需要一行代码就可以实现动画效果了哦！
这里只公共了一个方法，并将常用的动画使用一个枚举类型来指定，不用再记着那些单词了。
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//
// HYBTransitionAnimation.h
// CATransitionOfObjCDemo
//
// Created by huangyibiao on 15/12/14.
// Copyright © 2015年 huangyibiao. All rights reserved.
//
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
typedef NS_ENUM(NSUInteger, HYBTransitionType) {
kHYBTransitionFade = 1, // 淡入淡出
kHYBTransitionPush, // 推进效果
kHYBTransitionReveal, // 揭开效果
kHYBTransitionMoveIn, // 慢慢进入并覆盖效果
kHYBTransitionCube, // 立体翻转效果
kHYBTransitionSuckEffect, // 像被吸入瓶子的效果
kHYBTransitionRippleEffect, // 波纹效果
kHYBTransitionPageCurl, // 翻页效果
kHYBTransitionPageUnCurl, // 反翻页效果
kHYBTransitionCameraOpen, // 开镜头效果
kHYBTransitionCameraClose, // 关镜头效果
kHYBTransitionCurlDown, // 下翻页效果
kHYBTransitionCurlUp, // 上翻页效果
kHYBTransitionFlipFromLeft, // 左翻转效果
kHYBTransitionFlipFromRight,// 右翻转效果
kHYBTransitionOglFlip // 翻转
};
typedef NS_ENUM(NSUInteger, HYBTransitionSubtype) {
kHYBTransitionSubtypeFromLeft = 1, // 从左边进入
kHYBTransitionSubtypeFromRight, // 从右边进入
kHYBTransitionSubtypeFromTop, // 从顶部进入
kHYBTransitionSubtypeFromBottom // 从底部进入
};
@interface HYBTransitionAnimation : NSObject
+ (void)transitionForView:(UIView *)aView
type:(HYBTransitionType)type
subtype:(HYBTransitionSubtype)subtype
duration:(NSTimeInterval)duration;
@end
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其实实现的代码也很简单，只是对枚举类型判断一下，然后添加动画：
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//
// HYBTransitionAnimation.m
// CATransitionOfObjCDemo
//
// Created by huangyibiao on 15/12/14.
// Copyright © 2015年 huangyibiao. All rights reserved.
//
#import "HYBTransitionAnimation.h"
@implementation HYBTransitionAnimation
+ (void)transitionForView:(UIView *)aView
type:(HYBTransitionType)type
subtype:(HYBTransitionSubtype)subtype
duration:(NSTimeInterval)duration {
NSString *animationType = nil;
NSString *animationSubtype = nil;
switch (subtype) {
case kHYBTransitionSubtypeFromLeft:
animationSubtype = kCATransitionFromLeft;
break;
case kHYBTransitionSubtypeFromRight:
animationSubtype = kCATransitionFromRight;
break;
case kHYBTransitionSubtypeFromTop:
animationSubtype = kCATransitionFromTop;
break;
case kHYBTransitionSubtypeFromBottom:
animationSubtype = kCATransitionFromBottom;
break;
default:
break;
}
switch (type) {
case kHYBTransitionFade: {
animationType = kCATransitionFade;
break;
}
case kHYBTransitionPush: {
animationType = kCATransitionPush;
break;
}
case kHYBTransitionReveal: {
animationType = kCATransitionReveal;
break;
}
case kHYBTransitionMoveIn: {
animationType = kCATransitionMoveIn;
break;
}
case kHYBTransitionCube: {
animationType = @"cube";
break;
}
case kHYBTransitionSuckEffect: {
animationType = @"suckEffect";
break;
}
case kHYBTransitionRippleEffect: {
animationType = @"rippleEffect";
break;
}
case kHYBTransitionPageCurl: {
animationType = @"pageCurl";
break;
}
case kHYBTransitionPageUnCurl: {
animationType = @"pageUnCurl";
break;
}
case kHYBTransitionCameraOpen: {
animationType = @"cameraIrisHollowOpen";
break;
}
case kHYBTransitionCameraClose: {
animationType = @"cameraIrisHollowClose";
break;
}
case kHYBTransitionCurlDown: {
[self animationForView:aView type:UIViewAnimationTransitionCurlDown duration:duration];
break;
}
case kHYBTransitionCurlUp: {
[self animationForView:aView type:UIViewAnimationTransitionCurlUp duration:duration];
break;
}
case kHYBTransitionFlipFromLeft: {
[self animationForView:aView type:UIViewAnimationTransitionFlipFromLeft duration:duration];
break;
}
case kHYBTransitionFlipFromRight: {
[self animationForView:aView type:UIViewAnimationTransitionFlipFromRight duration:duration];
break;
}
case kHYBTransitionOglFlip:
animationType = @"oglFlip";
break;
default: {
break;
}
}
if (animationType != nil) {
CATransition *animation = [CATransition animation];
animation.duration = duration;
animation.type = animationType;
if (animationSubtype != nil) {
animation.subtype = animationSubtype;
}
animation.timingFunction = UIViewAnimationOptionCurveEaseInOut;
[aView.layer addAnimation:animation forKey:@"animation"];
}
}
+ (void)animationForView:(UIView *)aView
type:(UIViewAnimationTransition)type
duration:(NSTimeInterval)duration {
[UIView animateWithDuration:duration animations:^{
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
[UIView setAnimationTransition:type forView:aView cache:YES];
}];
}
@end
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我们的核心添加动画的代码是：
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CATransition *animation = [CATransition animation];
animation.duration = duration;
animation.type = animationType;
if (animationSubtype != nil) {
animation.subtype = animationSubtype;
}
animation.timingFunction = UIViewAnimationOptionCurveEaseInOut;
[aView.layer addAnimation:animation forKey:@"animation"];
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系统提供给我们一些动画是在UIView上提供的方法，我们可以看看这个枚举：
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typedef NS_ENUM(NSInteger, UIViewAnimationTransition) {
UIViewAnimationTransitionNone,
UIViewAnimationTransitionFlipFromLeft,
UIViewAnimationTransitionFlipFromRight,
UIViewAnimationTransitionCurlUp,
UIViewAnimationTransitionCurlDown,
};
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我们添加动画只需要调用UIView添加动画的方法就可以实现了：
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[UIView animateWithDuration:duration animations:^{
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
[UIView setAnimationTransition:type forView:aView cache:YES];
}];
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我们在ViewController这里尝试一下效果，这里只是使用定时器每一秒就自动切换一种效果：
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//
// ViewController.m
// CATransitionOfObjCDemo
//
// Created by huangyibiao on 15/12/14.
// Copyright © 2015年 huangyibiao. All rights reserved.
//
#import "ViewController.h"
#import "HYBTransitionAnimation.h"
@interface ViewController ()
@property (nonatomic, assign) int subtype;
@property (nonatomic, strong) NSArray *array;
@property (nonatomic, strong) UIImage *img1;
@property (nonatomic, strong) UIImage *img2;
@property (nonatomic, assign) BOOL isImg1;
@property (nonatomic, assign) NSUInteger index;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.array = @[@(kHYBTransitionFade),
@(kHYBTransitionPush),
@(kHYBTransitionReveal),
@(kHYBTransitionMoveIn),
@(kHYBTransitionCube),
@(kHYBTransitionSuckEffect),
@(kHYBTransitionRippleEffect),
@(kHYBTransitionPageCurl),
@(kHYBTransitionPageUnCurl),
@(kHYBTransitionCameraOpen),
@(kHYBTransitionCameraClose),
@(kHYBTransitionCurlDown),
@(kHYBTransitionCurlUp),
@(kHYBTransitionFlipFromLeft),
@(kHYBTransitionFlipFromRight),
@(kHYBTransitionOglFlip)];
self.img1 = [UIImage imageNamed:@"1.png"];
self.img2 = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"3" ofType:@"jpg"]];
self.view.backgroundColor = [UIColor colorWithPatternImage:self.img1];
self.isImg1 = YES;
[NSTimer scheduledTimerWithTimeInterval:1.0
target:self
selector:@selector(updateAnimation)
userInfo:nil
repeats:YES];
}
- (void)updateAnimation {
if (self.index >= self.array.count) {
self.index = 0;
}
HYBTransitionType type = [[self.array objectAtIndex:self.index++] intValue];
static int s_subtypeValue = 0;
HYBTransitionSubtype subtype = kHYBTransitionSubtypeFromTop;
s_subtypeValue++;
if (s_subtypeValue >= 4) {
s_subtypeValue = 1;
}
subtype = (HYBTransitionSubtype)s_subtypeValue;
[HYBTransitionAnimation transitionForView:self.view
type:type
subtype:subtype
duration:1.0];
if (self.isImg1) {
self.view.backgroundColor = [UIColor colorWithPatternImage:self.img1];
} else {
self.view.backgroundColor = [UIColor colorWithPatternImage:self.img2];
}
self.isImg1 = !self.isImg1;
}
@end
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原文地址：http://www.cnblogs.com/jiayongqiang/p/5339664.html
