IOS核心动画

核心动画

原码：

核心动画

1.CABasicAnimation：基础动画

- (void)basicAnimation:(CALayer *)layer
{
//1.创建动画对象
CABasicAnimation *animation = [CABasicAnimation animation];
//2.设置动画对象
/*
keyPath:决定执行怎样的动画，调整哪个属性来执行动画。
fromValue:属性值丛什么值开始执行动画。
toValue:属性值到达什么值结束动画。
byVale:属性值增加了多少值之后结束动画。
duration:动画持续时间。

注意：以下两个属性结合起来用能让图层保持动画结束后的状态。
removedOnCompletion:执行完动画后是否移除该动画。
fillMode:动画保持的状态。
fillMode的作用就是决定当前对象过了非active时间段的行为. 比如动画开始之前,动画结束之后。如果是一个动画CAAnimation,则需要将其removedOnCompletion设置为NO,要不然fillMode不起作用.
fillMode取值：
1.kCAFillModeRemoved： 这个是默认值,也就是说当动画开始前和动画结束后,动画对layer都没有影响,动画结束后,layer会恢复到之前的状态 。
2.kCAFillModeForwards： 当动画结束后,layer会一直保持着动画最后的状态
3.kCAFillModeBackwards： 这个和kCAFillModeForwards是相对的,就是在动画开始前,你只要将动画加入了一个layer,layer便立即进入动画的初始状态并等待动画开始.你可以这样设定测试代码,将一个动画加入一个layer的时候延迟5秒执行.然后就会发现在动画没有开始的时候,只要动画被加入了layer,layer便处于动画初始状态
4.kCAFillModeBoth： 理解了上面两个,这个就很好理解了,这个其实就是上面两个的合成.动画加入后开始之前,layer便处于动画初始状态,动画结束后layer保持动画最后的状态.
*/
CGFloat tabbar_height = 49;
switch ([self.layers indexOfObject:layer]) {
case 0:
animation.keyPath = @"position";
animation.fromValue = [NSValue valueWithCGPoint:self.view.center];
animation.toValue = [NSValue valueWithCGPoint:CGPointMake(Main_Screen_With/3/2, Main_Screen_Height - Main_Screen_With/3/2 - tabbar_height)];
break;
case 1:
animation.keyPath = @"transform.translation.y";
animation.fromValue = [NSNumber numberWithFloat:0];
animation.toValue = [NSNumber numberWithFloat:Main_Screen_Height - Main_Screen_With/3 - tabbar_height];
break;
case 2:
animation.keyPath = @"transform.translation";
animation.fromValue = [NSValue valueWithCGPoint:CGPointMake(0, 0)];
animation.toValue = [NSValue valueWithCGPoint:CGPointMake(0, Main_Screen_Height - Main_Screen_With/3 - tabbar_height)];            break;
case 3:
animation.keyPath = @"bounds";
animation.fromValue = [NSValue valueWithCGRect:CGRectMake(0, 0, Main_Screen_With/3, Main_Screen_With/3)];
animation.toValue = [NSValue valueWithCGRect:CGRectMake(0, 0, Main_Screen_With/3, -Main_Screen_With/3/5)];
break;
case 4:
animation.keyPath = @"transform";
animation.byValue = [NSValue valueWithCATransform3D:CATransform3DMakeRotation(M_PI_2, 1, 1, 0)];
break;

default:
break;
}
animation.duration = 2;
animation.delegate = self;

animation.removedOnCompletion = NO;
animation.fillMode = kCAFillModeForwards;

//3.添加动画
[layer addAnimation:animation forKey:nil];
}

2.CAKeyframeAnimation：帧动画

- (void)keyFromAnimationInView:(UIView *)view andTapCount:(NSInteger)count
{
//1.创建动画
CAKeyframeAnimation *animation = [CAKeyframeAnimation animation];
//2.设置动画属性
/*
values:指明整个动画过程中的关键帧点，需要注意的是，起点必须作为values的第一个值。

keyTimes:该属性是一个数组，用以指定每个子路径(AB,BC,CD)的时间。如果你没有显式地对keyTimes进行设置，则系统会默认每条子路径的时间为：ti=duration/(5-1)，即每条子路径的duration相等，都为duration的1\4。当然，我们也可以传个数组让物体快慢结合。例如，你可以传入{0.0, 0.1,0.6,0.7,1.0}，其中首尾必须分别是0和1，因此tAB=0.1-0, tCB=0.6-0.1, tDC=0.7-0.6, tED=1-0.7.....

path:动画运动的路径。

repeatCount:动画重复次数。

timingFunctions:这个属性用以指定时间函数，控制动画节奏，类似于运动的加速度，有以下几种类型。记住，这是一个数组，你有几个子路径就应该传入几个元素
属性值描述：
1 kCAMediaTimingFunctionLinear//线性

4000
2 kCAMediaTimingFunctionEaseIn//淡入
3 kCAMediaTimingFunctionEaseOut//淡出
4 kCAMediaTimingFunctionEaseInEaseOut//淡入淡出
5 kCAMediaTimingFunctionDefault//默认

calculationMode：该属性决定了物体在每个子路径下是跳着走还是匀速走，跟timeFunctions属性有点类似
属性值描述：
1 const kCAAnimationLinear//线性，默认
2 const kCAAnimationDiscrete//离散，无中间过程，但keyTimes设置的时间依旧生效，物体跳跃地出现在各个关键帧上
3 const kCAAnimationPaced//平均，keyTimes跟timeFunctions失效
4 const kCAAnimationCubic//平均，同上
5 const kCAAnimationCubicPaced//平均，同上
*/
animation.delegate = self;

switch (count) {
case 1:
{
animation.keyPath = @"position";
CGPoint centerP = self.view.center;
CGFloat L = [UIScreen mainScreen].bounds.size.width - 100;
NSValue *value1 = [NSValue valueWithCGPoint:centerP];
NSValue *value2 = [NSValue valueWithCGPoint:CGPointMake(centerP.x - L/2, centerP.y - L/2)];
NSValue *value3 = [NSValue valueWithCGPoint:CGPointMake(centerP.x + L/2, centerP.y - L/2)];
NSValue *value4 = [NSValue valueWithCGPoint:CGPointMake(centerP.x + L/2, centerP.y + L/2)];
NSValue *value5 = [NSValue valueWithCGPoint:CGPointMake(centerP.x - L/2, centerP.y + L/2)];
NSValue *value6 = [NSValue valueWithCGPoint:CGPointMake(centerP.x - L/2, centerP.y - L/2)];
NSValue *value7 = [NSValue valueWithCGPoint:centerP];
animation.values = @[value1,value2,value3,value4,value5,value6,value7];

//animation.keyTimes = @[@(0),@(0.1),@(0.3),@(0.5),@(0.7),@(0.9),@(1)];
animation.duration = 5;

animation.timingFunctions = @[[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn],[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear],[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear],[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear],[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear],[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];
}
break;
case 2:
{
animation.keyPath = @"position";
CGMutablePathRef path = CGPathCreateMutable();
CGFloat main_screen_w = [UIScreen mainScreen].bounds.size.width;
CGFloat main_screen_h = [UIScreen mainScreen].bounds.size.height;
CGFloat view_w = 100;
CGPathAddEllipseInRect(path, NULL, CGRectMake(view_w/2, view_w/2, main_screen_w - view_w, main_screen_h - view_w - 49));
animation.path = path;
CGPathRelease(path);

animation.duration = 10;

animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
}
break;
case 3:
{
animation.keyPath = @"transform.rotation.z";
animation.values = @[@(0),@(M_PI_4),@(-M_PI_4),@(0)];
animation.timingFunctions = @[[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut],[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut],[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn]];
animation.duration = 2;
animation.repeatCount = MAXFLOAT;
}
break;

default:
break;
}

animation.removedOnCompletion = NO;
animation.fillMode = kCAFillModeForwards;

//3.添加动画到图层
[view.layer addAnimation:animation forKey:nil];
}

3.CATransition:过度动画

- (IBAction)swipeGestureAction:(UISwipeGestureRecognizer *)sender {
NSString *picName;
CATransition *animation = [CATransition animation];
/* 转场动画
动画属性：
type:执行什么样的动画。
属性取值：
fade     //交叉淡化过渡(不支持过渡方向) kCATransitionFade
push     //新视图把旧视图推出去  kCATransitionPush
moveIn   //新视图移到旧视图上面   kCATransitionMoveIn
reveal   //将旧视图移开,显示下面的新视图  kCATransitionReveal
cube     //立方体翻滚效果
oglFlip  //上下左右翻转效果
suckEffect   //收缩效果，如一块布被抽走(不支持过渡方向)
rippleEffect //滴水效果(不支持过渡方向)
pageCurl     //向上翻页效果
pageUnCurl   //向下翻页效果
cameraIrisHollowOpen  //相机镜头打开效果(不支持过渡方向)
cameraIrisHollowClose //相机镜头关上效果(不支持过渡方向)
startProgress:动画从什么时候开始（相对于整个动画过程）
endProgress:动画从什么时候结束（相对于整个动画过程）

subType:动画的方向
kCATransitionFromRight：从右边
kCATransitionFromLeft：从左边
kCATransitionFromBottom：从底部
kCATransitionFromTop：从上边
*/
if (sender.direction == UISwipeGestureRecognizerDirectionRight) {
self.pageNumber --;
if (self.pageNumber < 0) {
self.pageNumber = 8;
}
picName = [NSString stringWithFormat:@"%i.jpg",abs(self.pageNumber + 1)];
animation.type = @"pageUnCurl";
//animation.subtype = kCATransitionFromRight;
animation.duration = 0.5;
}
else if (sender.direction == UISwipeGestureRecognizerDirectionLeft)
{
self.pageNumber ++;
if (self.pageNumber > 8) {
self.pageNumber = 0;
}
picName = [NSString stringWithFormat:@"%i.jpg",self.pageNumber + 1];
animation.type = @"pageCurl";
animation.subtype = kCATransitionFromBottom;
animation.duration = 0.5;
}
self.imageView.image = [UIImage imageNamed:picName];
[self.imageView.layer addAnimation:animation forKey:nil];
}

4.CAAnimationGroup：组动画

- (void)groupAnimation
{
//1.创建组动画
CAAnimationGroup *group = [CAAnimationGroup animation];
//2.将其他动画加入组动画中
group.animations = @[[self creatOpacityAnimation],[self creatKeyfromAnimation]];
group.duration = 0.5;
group.removedOnCompletion = NO;
group.fillMode = kCAFillModeForwards;
//1.将动画组添加到图层上
[self.button.layer addAnimation:group forKey:nil];
}
- (CABasicAnimation *)creatOpacityAnimation
{
CABasicAnimation *animation = [CABasicAnimation animation];
animation.keyPath = @"opacity";
animation.fromValue = @(0);
animation.toValue = @(1);

return animation;
}
- (CAKeyframeAnimation *)creatKeyfromAnimation
{
CAKeyframeAnimation *animation = [CAKeyframeAnimation animation];
animation.keyPath = @"position";
CGMutablePathRef path = CGPathCreateMutable();
CGPathAddArc(path, NULL, self.view.center.x + 50, self.view.center.y, 50, M_PI, 0, YES);
animation.path = path;

return animation;
}

5.View动画

//核心动画都是假象，并没有改变真实的属性。
[UIView transitionWithView:self.view duration:0.5 options:UIViewAnimationOptionTransitionCurlUp animations:^{
self.index ++;
if (self.index > 8) {
self.index = 0;
}
self.imageVIew.image = [UIImage imageNamed:[NSString stringWithFormat:@"%i.jpg",(int)self.index + 1]];
} completion:nil];