CAKeyframeAnimation：关键帧动画
是通过某一属性按照一串的数值进行动画，就好像制作动画的时候一帧一帧的制作一样。
//•calculationMode目前提供如下几种模式：
//–kCAAnimationLinear 默认值，表示当关键帧为座标点的时候，关键帧之间直接直线相连进行插值计算
//–kCAAnimationDiscrete 离散的，不进行插值计算，所有关键帧直接逐个进行显示
//–kCAAnimationPaced 使得动画均匀进行，而不是按keyTimes设置的或者按关键帧平分时间，此时keyTimes和timingFunctions无效
//–kCAAnimationCubic 对关键帧为座标点的关键帧进行圆滑曲线相连后插值计算，这里的主要目的是使得运行的轨迹变得圆滑
//–kCAAnimationCubicPaced 看这个名字就知道和kCAAnimationCubic有一定联系,其实就是在kCAAnimationCubic的基础上使得动画运行变得均匀，就是系统时间内运动的距离相同，此时keyTimes以及timingFunctions也是无效的
//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
实例：
#import "JumpToKeyController.h"
@interface JumpToKeyController ()
@property (nonatomic, strong) UIView *viewRect;
@end
@implementation JumpToKeyController
#pragma mark - LfileCycle
- (void)viewDidLoad
{
[super viewDidLoad];
UIButton *pathButton = [UIButton createButton:@"path" target:self action:@selector(pathButtonClick)];
pathButton.frame = CGRectMake(80, 60, 100, 40);
[self.view addSubview:pathButton];
UIButton *zoomButton = [UIButton createButton:@"3D缩放效果" target:self action:@selector(zoomButtonClick)];
zoomButton.frame = CGRectMake(180, 60, 100, 40);
[self.view addSubview:zoomButton];
UIButton *certainButton = [UIButton createButton:@"移动" target:self action:@selector(certainButtonClik)];
certainButton.frame = CGRectMake(80, 100, 100, 40);
[self.view addSubview:certainButton];
self.viewRect = [[UIView alloc] initWithFrame:CGRectMake(40, 250, 50, 50)];
self.viewRect.backgroundColor = [UIColor redColor];
[self.view addSubview:_viewRect];
}
#pragma mark - Touch Event
- (void)pathButtonClick
{
//贝塞尔曲线
// 学习UIBezierPath:http://www.jianshu.com/p/734b34e82135
// UIBezierPath *path = [UIBezierPath bezierPath];
//
// [path moveToPoint:CGPointMake(-40, 100)];// 开始位置
// [path addLineToPoint:CGPointMake(360, 100)];
// [path addLineToPoint:CGPointMake(360, 200)];
// [path addLineToPoint:CGPointMake(-40, 200)];
// [path addLineToPoint:CGPointMake(-40, 300)];
// [path addLineToPoint:CGPointMake(360, 300)];
// 使用画圆
// UIBezierPath这个类呢主要用于绘图。
UIBezierPath *path = [UIBezierPath bezierPath];
[path addArcWithCenter:self.view.center radius:100.0 startAngle:0.0 endAngle:180.0 clockwise:YES];
[path stroke];
CAKeyframeAnimation *animation = [CAKeyframeAnimation animationWithKeyPath:@"position"];
animation.duration = 2.0f;
animation.rotationMode = kCAAnimationDiscrete;
animation.path = path.CGPath;
[animation setKeyTimes:[NSArray arrayWithObjects:[NSNumber numberWithFloat:0.0],[NSNumber numberWithFloat:0.1], [NSNumber numberWithFloat:0.50],[NSNumber numberWithFloat:0.65], [NSNumber numberWithFloat:0.7],[NSNumber numberWithFloat:1.0], nil]];
[self.viewRect.layer addAnimation:animation forKey:@"moveAnimation"];
}
- (void)zoomButtonClick
{
CAKeyframeAnimation *animation = [CAKeyframeAnimation animationWithKeyPath:@"transform"];
///设置动画
CATransform3D forward = CATransform3DMakeScale(1.3, 1.3, 1);
CATransform3D back = CATransform3DMakeScale(0.7, 0.7, 1);
CATransform3D forward2 = CATransform3DMakeScale(1.2, 1.2, 1);
CATransform3D back2 = CATransform3DMakeScale(0.9, 0.9, 1);
[animation setValues:[NSArray arrayWithObjects:
[NSValue valueWithCATransform3D:CATransform3DIdentity],
[NSValue valueWithCATransform3D:forward],
[NSValue valueWithCATransform3D:back],
[NSValue valueWithCATransform3D:forward2],
[NSValue valueWithCATransform3D:back2],
[NSValue valueWithCATransform3D:CATransform3DIdentity],nil]];
[animation setDuration:1];// 执行动画时间
[self.viewRect.layer addAnimation:animation forKey:nil];
}
- (void)certainButtonClik
{
// 添加曲线Path
CGMutablePathRef path = CGPathCreateMutable();
// 开始位置
CGPathMoveToPoint(path, NULL, 50.f, 130.f);
// CG路径添加曲线点
CGPathAddCurveToPoint(path, NULL, 50.0, 275.0, 150.0, 275.0, 150.0, 120.0);
CGPathAddCurveToPoint(path,NULL,150.0,275.0,250.0,275.0,250.0,120.0);
CGPathAddCurveToPoint(path,NULL,250.0,275.0,350.0,275.0,350.0,120.0);
CGPathAddCurveToPoint(path,NULL,350.0,275.0,450.0,275.0,450.0,120.0);
CAKeyframeAnimation *animation = [CAKeyframeAnimation animationWithKeyPath:@"position"];
[animation setPath:path];
[animation setDuration:3.0];
[animation setAutoreverses:YES];
[animation setRepeatCount:2.0];
CFRelease(path);
[self.viewRect.layer addAnimation:animation forKey:NULL];
}
@end