Animation主要分为两类：
1、UIView属性动画
2、CoreAnimation动画
一、UIView属性动画
UIKit直接将动画集成到UIView类中，实现简单动画的创建过程。UIView类定义了几个内在支持动画的属性声明，当这些属性发生改变时，视图为其变化过程提供内建的动画支持。
1、常见方法：
+ (void)setAnimationDelegate:(id)delegate——设置动画代理对象；
+ (void)setAnimationWillStartSelector:(SEL)selector——当动画即将开始时，执行delegate对象的selector；
+ (void)setAnimationDidStopSelector:(SEL)selector——当动画结束时，执行delegate对象的selector；
+ (void)setAnimationDuration:(NSTimeInterval)duration——动画的持续时间；
+ (void)setAnimationDelay:(NSTimeInterval)delay——动画延迟时间（单位：秒）；
+ (void)setAnimationStartDate:(NSDate *)startDate——动画的开始时间；
+ (void)setAnimationCurve:(UIViewAnimationCurve)curve——动画的节奏控制；
+ (void)setAnimationRepeatCount:(float)repeatCount——动画的重复次数；
+ (void)setAnimationRepeatAutoreverses:(BOOL)repeatAutoreverses——设置为YES,代表动画每次重复执行的效果会跟上一次相反
+ (void)setAnimationTransition:(UIViewAnimationTransition)transition
forView:(UIView *)view
cache:(BOOL)cache—— 设置视图view的过渡效果（transition制定过渡类型, cache设置YES代表使用视图缓存）；
demo:
#import "ViewController.h"
@interface ViewController (){
UIView *myView;
}
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
myView = [[UIView alloc] initWithFrame:(CGRect){,,,}];
myView.backgroundColor = [UIColor blueColor];
[self.view addSubview:myView];
//准备动画 参数1: 动画的作用, 任意字符串，用来区分多个动画；参数二: 传递参数
[UIView beginAnimations:nil context:nil];
//动画持续时间
[UIView setAnimationDuration:];
//设置代理
[UIView setAnimationDelegate:self];
//设置动画开始执行调用事件
[UIView setAnimationWillStartSelector:@selector(startAnimation)];
//动画曲线
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
//动画重复次数
[UIView setAnimationRepeatCount:];
//是否往返执行
[UIView setAnimationRepeatAutoreverses:YES];
//设置动画终点位置
myView.center = (CGPoint){,};
//设置动画执行完毕调用事件
[UIView setAnimationDidStopSelector:@selector(stopAnimation)];
//执行动画
[UIView commitAnimations];
}
- (void)startAnimation{
NSLog(@"动画开始执行");
}
- (void)stopAnimation{
CGFloat x = myView.frame.origin.x;
CGFloat y = myView.frame.origin.y;
NSLog(@"动画执行完毕位置:(%f,%f)",x,y);
}
打印：
2、block动画
（1）+ (void)animateWithDuration:(NSTimeInterval)duration ——动画的持续时间
delay:(NSTimeInterval)delay ——动画延迟时间
options:(UIViewAnimationOptions)options ——动画的节奏控制
animations:(void (^)(void))animations ——将改变视图属性的代码放在这个block中
completion:(void (^)(BOOL finished))completion; ——动画结束后，会自动调用这个block
[UIView animateWithDuration:
delay:
options:UIViewAnimationOptionCurveEaseIn
animations:^{
[UIView setAnimationCurve:UIViewAnimationCurveLinear];
myView.center = (CGPoint){,};
} completion:nil];
(2) + (void)transitionWithView:(UIView *)view ——需要进行转场动画的视图
duration:(NSTimeInterval)duration ——动画的持续时间
options:(UIViewAnimationOptions)options ——转场动画的类型
animations:(void (^)(void))animations ——将改变视图属性的代码放在这个block中
completion:(void (^)(BOOL finished))completion; ——动画结束后，会自动调用这个block
[UIView transitionWithView:myView
duration:
options:UIViewAnimationOptionShowHideTransitionViews
animations:^{
[UIView setAnimationCurve:UIViewAnimationCurveLinear];
myView.center = (CGPoint){,};
}
completion:nil];
(3) + (void)transitionFromView:(UIView *)fromView ——把fromView从父视图中移除（[fromView.superview removeFromSuperview];）
toView:(UIView *)toView ——添加toView到父视图（[fromView.superview addSubview:toView];）
duration:(NSTimeInterval)duration ——动画的持续时间
options:(UIViewAnimationOptions)options ——转场动画的类型
completion:(void (^)(BOOL finished))completion; ——动画结束后，会自动调用这个block；
[UIView transitionFromView:myView
toView:myView
duration:
options:UIViewAnimationOptionShowHideTransitionViews
completion:nil];
options枚举：
正文：
UIViewAnimationOptionLayoutSubviews //提交动画的时候布局子控件，表示子控件将和父控件一同动画。
UIViewAnimationOptionAllowUserInteraction //动画时允许用户交流，比如触摸
UIViewAnimationOptionBeginFromCurrentState //从当前状态开始动画
UIViewAnimationOptionRepeat //动画无限重复
UIViewAnimationOptionAutoreverse //执行动画回路,前提是设置动画无限重复
UIViewAnimationOptionOverrideInheritedDuration //忽略外层动画嵌套的执行时间
UIViewAnimationOptionOverrideInheritedCurve //忽略外层动画嵌套的时间变化曲线
UIViewAnimationOptionAllowAnimatedContent //通过改变属性和重绘实现动画效果，如果key没有提交动画将使用快照
UIViewAnimationOptionShowHideTransitionViews //用显隐的方式替代添加移除图层的动画效果
UIViewAnimationOptionOverrideInheritedOptions //忽略嵌套继承的选项
时间函数曲线相关：
UIViewAnimationOptionCurveEaseInOut //时间曲线函数，由慢到快
UIViewAnimationOptionCurveEaseIn //时间曲线函数，由慢到特别快
UIViewAnimationOptionCurveEaseOut //时间曲线函数，由快到慢
UIViewAnimationOptionCurveLinear //时间曲线函数，匀速
转场动画相关：
UIViewAnimationOptionTransitionNone //无转场动画
UIViewAnimationOptionTransitionFlipFromLeft //转场从左翻转
UIViewAnimationOptionTransitionFlipFromRight //转场从右翻转
UIViewAnimationOptionTransitionCurlUp //上卷转场
UIViewAnimationOptionTransitionCurlDown //下卷转场
UIViewAnimationOptionTransitionCrossDissolve //转场交叉消失
UIViewAnimationOptionTransitionFlipFromTop //转场从上翻转
UIViewAnimationOptionTransitionFlipFromBottom //转场从下翻转
3、UIImageView的帧动画
UIImageView可以让一系列的图片在特定的时间内按顺序显示。
相关属性：
animationImages：要显示的图片(一个装着UIImage的NSArray)
animationDuration：完整地显示一次animationImages中的所有图片所需的时间
animationRepeatCount：动画的执行次数(默认为0，代表无限循环)
相关方法：
- (void)startAnimating; 开始动画
- (void)stopAnimating; 停止动画
- (BOOL)isAnimating; 是否正在运行动画
二、CoreAnimation动画
Core Animation，中文翻译为核心动画，它是直接作用在CALayer上的，并非UIView。
CALayer的基本属性：
CGRect bounds：宽度和高度
CGPoint anchorPoint：锚点(x,y的范围都是0-1，默认值为(0.5, 0.5))
CGPoint position：位置(默认指中点，具体由anchorPoint决定)
CGColorRef backgroundColor：背景颜色(CGColorRef类型)
CATransform3D transform：形变属性
1、CABasicAnimation
创建CABasicAnimation 时,需要通过-setFromValue 和-setToValue 来指定一个开始值和结束值；当增加基础动画到层中的时候,它开始运行。
常见属性
Autoreverses：动画结束时是否执行逆动画
timingFunction：设定动画的速度变化beginTime：指定动画开始时间（从开始指定延迟几秒执行的话，应设置为「CACurrentMediaTime() + 秒数」的形式）
repeatCount：重复次数
duration：动画时长（秒为单位）
fromValue：开始值
toValue：终了值（絶対値）
byValue：终了值（相对值）
实例：
（1）移动动画
#import "ViewController.h"
@interface ViewController (){
UIView *myView;
CABasicAnimation *moveAnimation;
}
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
myView = [[UIView alloc] initWithFrame:(CGRect){,,,}];
myView.backgroundColor = [UIColor blueColor];
[self.view addSubview:myView];
//移动
moveAnimation = [CABasicAnimation animationWithKeyPath:@"position"];
//持续时间
moveAnimation.duration = ;
//重复次数
moveAnimation.repeatCount = ;
//起始帧和终了帧的设定
moveAnimation.fromValue = [NSValue valueWithCGPoint:(CGPoint){,}];
moveAnimation.toValue = [NSValue valueWithCGPoint:(CGPoint){,}];
//添加动画
[myView.layer addAnimation:moveAnimation forKey:@"moveAnimation"];
}
(2)旋转动画
@interface ViewController (){
UIView *myView;
CABasicAnimation *rotationAnimation;
}
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
myView = [[UIView alloc] initWithFrame:(CGRect){,,,}];
myView.backgroundColor = [UIColor blueColor];
[self.view addSubview:myView];
//旋转（绕X轴方向旋转）
rotationAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.x"];
//持续时间
rotationAnimation.duration = ;
//重复次数
rotationAnimation.repeatCount = ;
//起始帧和终了帧的设定
rotationAnimation.fromValue = [NSNumber numberWithFloat:];//开始时的角度
rotationAnimation.toValue = [NSNumber numberWithFloat: * M_PI]; // 结束时的角度
//添加动画
[myView.layer addAnimation:rotationAnimation forKey:@"rotationAnimation"];
}
UIBezierPath绘制结合Animation，（类似于刷新时会转的小圈圈。。。）
demo(分两步):
1、绘制
#import <UIKit/UIKit.h> @interface Draw : UIView @end #import "Draw.h"
#define PI 3.1415926535898 @interface Draw (){
UIBezierPath *path;
} @end @implementation Draw - (id)initWithFrame:(CGRect)frame{ self = [super initWithFrame:frame];
if (self) {
self.backgroundColor = [UIColor whiteColor];
}
return self;
} // Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
// Drawing code UIColor *color = [UIColor orangeColor];
[color set]; path = [UIBezierPath bezierPathWithArcCenter:(CGPoint){,} radius: startAngle: endAngle:0.125*PI clockwise:NO];
path.lineWidth = ;
path.lineCapStyle = kCGLineCapRound;
path.lineJoinStyle = kCGLineJoinRound; [path stroke];
}
2、动画
#import "ViewController.h"
#import "Draw.h" #define PI 3.1415926535898 @interface ViewController (){ Draw *draw;
CABasicAnimation *arcAnimation; } @implementation ViewController - (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib. draw = [[Draw alloc] initWithFrame:(CGRect){,,,}];
[self.view addSubview:draw]; arcAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];
arcAnimation.toValue = [NSNumber numberWithFloat:*PI];
arcAnimation.duration = ;
arcAnimation.repeatCount = MAXFLOAT;
[draw.layer addAnimation:arcAnimation forKey:@"rotationAnimation"]; }
效果图：（好吧，其实它是会转的，只不过我不会截gif图。。。）
（3）组合动画
#import "ViewController.h"
@interface ViewController (){
UIView *myView;
UIView *cirleView;
CABasicAnimation *moveAnimation;
CABasicAnimation *rotationAnimation;
CAAnimationGroup *animationGroup;
}
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
myView = [[UIView alloc] initWithFrame:(CGRect){,,,}];
myView.backgroundColor = [UIColor blueColor];
[self.view addSubview:myView];
cirleView = [[UIView alloc] initWithFrame:(CGRect){,,,}];
cirleView.layer.cornerRadius = ;
cirleView.backgroundColor = [UIColor orangeColor];
[myView addSubview:cirleView];
//移动
moveAnimation = [CABasicAnimation animationWithKeyPath:@"position"];
//起始帧和终了帧的设定
moveAnimation.fromValue = [NSValue valueWithCGPoint:(CGPoint){,}];
moveAnimation.toValue = [NSValue valueWithCGPoint:(CGPoint){,}];
//旋转
rotationAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.x"];
//起始帧和终了帧的设定
rotationAnimation.fromValue = [NSNumber numberWithFloat:];//开始时的角度
rotationAnimation.toValue = [NSNumber numberWithFloat: * M_PI]; // 结束时的角度
animationGroup = [CAAnimationGroup animation];
//持续时间
animationGroup.duration = ;
//重复次数
animationGroup.repeatCount = ;
//添加动画
animationGroup.animations = @[moveAnimation,rotationAnimation];
[myView.layer addAnimation:animationGroup forKey:@"move-rotation-group"];
}
好吧，至于这章为什么都没有效果图。。因为我不会弄gif图，等我会弄了会补上的。。。。