1 //初始化方式 CABasicAnimation * cabase=[CABasicAnimation animation]; 2 //通过keyPath设置需要实现动画的属性,此处设为bounds cabase.keyPath=@"bounds"; 3 //通过toValue设置动画结束时候的状态 cabase.toValue=[NSValue valueWithCGRect:CGRectMake(0, 0, 10, 100)]; //通过byValue设置每次改变的范围 cabase.byValue=[NSValue valueWithCGRect:CGRectMake(0, 0, 10, 100)]; //设置开始时候的状态 cabase.fromValue=[NSValue valueWithCGPoint:CGPointMake(0, 0)]; 4 //设置动画持续的时间 cabase.duration=2; //保存动画 cabase.fillMode=kCAFillModeForwards; //保存设置不取消 cabase.removedOnCompletion=NO; [_layer addAnimation:cabase forKey:nil];
案例:通过基础动画实现仿射变换动画
CABasicAnimation * cabase=[CABasicAnimation animation]; cabase.keyPath=@"transform"; cabase.toValue=[NSValue valueWithCATransform3D:CATransform3DMakeScale(1, 2, 1)]; cabase.duration=2; cabase.fillMode=kCAFillModeForwards; cabase.removedOnCompletion=NO; [_layer addAnimation:cabase forKey:nil];二、关键帧动画
1 //初始化方式 CAKeyframeAnimation * keyfram=[CAKeyframeAnimation animation]; 2 //通过keyPath设置需要实现动画的属性,此处设为position keyfram.keyPath=@"position"; 3 //设置动画的需要经过的点 CGPoint p1=CGPointZero; CGPoint p2=CGPointMake(150, 0); CGPoint p3=CGPointMake(150, 150); CGPoint p4=CGPointMake(0, 150); CGPoint p5=CGPointZero; NSValue * v1=[NSValue valueWithCGPoint:p1]; NSValue * v2=[NSValue valueWithCGPoint:p2]; NSValue * v3=[NSValue valueWithCGPoint:p3]; NSValue * v4=[NSValue valueWithCGPoint:p4]; NSValue * v5=[NSValue valueWithCGPoint:p5]; 4 //将对应的值添加到动画并且设置动画保留 keyfram.values=@[v1,v2,v3,v4,v5]; keyfram.duration=1; keyfram.fillMode=kCAFillModeForwards; keyfram.removedOnCompletion=NO; [_layer addAnimation:keyfram forKey:nil];
案例:通过关键帧动画实现图片摇摆
CAKeyframeAnimation * anima=[CAKeyframeAnimation animation]; //通过设置放射变换的角度来实现 anima.keyPath=@"transform.rotation"; float p1=4/180.0*M_PI; anima.duration=0.2; anima.values=@[@(-p1),@(p1),@(-p1)]; anima.fillMode=kCAFillModeForwards; anima.removedOnCompletion=NO; anima.repeatCount=MAXFLOAT; [_layer addAnimation:anima forKey:nil]; _layer.transform=CATransform3DMakeRotation(M_PI, 0, 0, 0);三、转场动画
1 //初始化方式 CATransition * tran=[CATransition animation]; 2 //设置动画效果 tran.type=@"rippleEffect"; //常用效果 kCATransitionFade kCATransitionMoveIn kCATransitionPush kCATransitionReveal 3 //设置动画方向 tran.subtype=kCATransitionFromLeft; //动画方向 kCATransitionFromRight kCATransitionFromLeft kCATransitionFromTop kCATransitionFromBottom 4 //设置动画保留以及动画时长 tran.fillMode=kCAFillModeForwards; tran.removedOnCompletion=NO; tran.duration=1; [self.myImageView.layer addAnimation:tran forKey:nil];四、UIView封装动画
UIKit直接将动画集成到UIView类中,当内部的一些属性发生改变时,UIView将为这些改变提供动画支持。执行动画所需要的工作由UIView类自动完成,但仍要在希望执行动画时通知视图,为此需要将改变属性的代码放在[UIViewbeginAnimations:nil context:nil]和[UIView commitAnimations]之间
1、常见方法解析:
//设置动画代理 + (void)setAnimationDelegate:(id)delegate //设置当动画即将开始时,执行delegate对象的selector,并且把beginAnimations:context:中传入的参数传进selector +(void)setAnimationWillStartSelector:(SEL)selector //设置动画结束时调用方法 + (void)setAnimationDidStopSelector:(SEL)selector //设置动画持续时间 +(void)setAnimationDuration:(NSTimeInterval)duration //设置动画延迟 + (void)setAnimationDelay:(NSTimeInterval)delay //设置动画开始时间 + (void)setAnimationStartDate:(NSDate *)startDate //设置动画节奏 + (void)setAnimationCurve:(UIViewAnimationCurve)curve //设置动画重复次数 + (void)setAnimationRepeatCount:(float)repeatCount //如果设置为YES,代表动画每次重复执行的效果会跟上一次相反 +(void)setAnimationRepeatAutoreverses:(BOOL)repeatAutoreverses // 设置视图view的过渡效果, transition指定过渡类型, cache设置YES代表使用视图缓存,性能较好 + (void)setAnimationTransition:(UIViewAnimationTransition)transition forView:(UIView *)view cache:(BOOL)cache
2、案例
//旋转动画 [UIView beginAnimations:@"roate" context:nil]; [UIView setAnimationCurve:UIViewAnimationCurveEaseOut]; [UIView setAnimationDuration:1.5]; [UIView setAnimationDelegate:self]; _view.transform=CGAffineTransformRotate(_view.transform, M_PI_2); [UIView setAnimationDidStopSelector:@selector(endAnimate)]; [UIView commitAnimations]; //转场动画 [UIView beginAnimations:@"transition" context:nil]; [UIView setAnimationCurve:UIViewAnimationCurveLinear]; [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight forView:_mainView cache:YES]; [UIView setAnimationDuration:1.5]; NSInteger index1=[_mainView.subviews indexOfObject:_view]; NSInteger index2=[_mainView.subviews indexOfObject:_view2]; [_mainView exchangeSubviewAtIndex:index1 withSubviewAtIndex:index2]; [UIView commitAnimations];