所谓的动画组就是将一些动画组合起来给layer使其的动画更丰富灵活。
它很简单,就是为其animations属性赋值一个动画数组。
- - (void)demoAnimationGroup
- {
- static NSString * const kCAPostionKeyPath = @"position";
- static NSString * const kCAOpacityKeyPath = @"opacity";
- static NSString * const kCARotationKeyPath = @"transform.rotation";
- static NSString * const kCAScaleKeyPath = @"transform.scale";
- UIBezierPath *path = [UIBezierPath bezierPath];
- [path moveToPoint:_demoView.layer.position];
- [path addCurveToPoint:CGPointMake(260, 400) controlPoint1:CGPointMake(0, 460) controlPoint2:CGPointMake(320, 0)];
- //路径动画
- CAKeyframeAnimation *posAnimation = [CAKeyframeAnimation animationWithKeyPath:kCAPostionKeyPath];
- posAnimation.path = path.CGPath;
- posAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
- //透明度动画
- CABasicAnimation *opaAnimation = [CABasicAnimation animationWithKeyPath:kCAOpacityKeyPath];
- opaAnimation.duration = 2.0f;
- opaAnimation.toValue = @(0.3f);
- opaAnimation.autoreverses = YES;
- //旋转动画
- CABasicAnimation *rotAnimation = [CABasicAnimation animationWithKeyPath:kCARotationKeyPath];
- rotAnimation.duration = 2.0f;
- rotAnimation.toValue = @(M_PI);
- rotAnimation.autoreverses = YES;
- //缩放动画
- CABasicAnimation *scaAnmaiton = [CABasicAnimation animationWithKeyPath:kCAScaleKeyPath];
- scaAnmaiton.duration = 2.0f;
- scaAnmaiton.toValue = @(1.5f);
- scaAnmaiton.autoreverses = YES;
- //设置动画组
- CAAnimationGroup *group = [CAAnimationGroup animation];
- group.animations = @[posAnimation, opaAnimation, rotAnimation, scaAnmaiton];
- group.duration = 4.0f;
- group.removedOnCompletion = NO;
- group.fillMode = kCAFillModeForwards;
- [_demoView.layer addAnimation:group forKey:nil];
- }
这个动画组对demoView的layer加入了一些同时进行的动画,比如双控制点的贝塞尔路径,透明度的渐隐渐明,旋转以及缩放等。
CATransition
转场动画几乎在所有的APP上都能遇见,经常用于视图控制器的切换或者单视图控制器的页面切换等,也可以在自定义UIStoryboardSegue中来加入动画效果。
它也是CAAnimation的子类,能为图层提供移出屏幕和移入的动画效果。
其常用属性为
type 过渡类型
subtype 过渡类型的子类型,方向设置
其中过渡类型有很多,最初有四个版本,后来又加入了一些,以字符串形式设置。
最初的四个:fade,push,moveIn,reveal
以后加入的效果则更加丰富和炫目,有 cube, oglFlip, suckEffect, rippleEffect, pageCurl, pageUnCurl, cameraIrisHollowOpen, cameraIrisHollowClose。
- - (void)viewTransition
- {
- static NSString * const kCATransitionTypeFlip = @"oglFlip"; //翻页效果
- CATransition *transition = [CATransition animation];
- transition.type = kCATransitionTypeFlip;
- transition.subtype = kCATransitionFromRight;
- transition.duration = 1.5f;
- [_transitionOrangeView.layer addAnimation:transition forKey:nil];
- [self.view performSelector:@selector(sendSubviewToBack:) withObject:_transitionOrangeView afterDelay:1.0f];
- }
这个方法简单的实现了view翻页的效果,当然目前控制器的根view只有一个subview,所以使用sendSubviewToBack的方法后显示的还是这个view,但是看到了动画效果。
现在UIView的转场动画有了更方便的类方法
+ transitionWithView:duration:options:animations:completion:
+ transitonFromView:toView:duration:options:completion:
这两个方法参数加入了苹果推荐的块代码,也让转场动画都在一个方法中进行处理,也对动画结束进行了处理,更加方便易用。
- - (void)anotherTransition
- {
- _transitionBlueView = [[UIView alloc] initWithFrame:self.view.bounds];
- _transitionBlueView.backgroundColor = [UIColor blueColor];
- [UIView transitionFromView:_transitionOrangeView
- toView:_transitionBlueView
- duration:1.0f
- options:UIViewAnimationOptionTransitionCrossDissolve
- completion:nil];
- }
代码很简洁和易读。
不过要注意的一点是,这里的参数并不是很多,而且我并没有对蓝色视图通过addSubview加载到self.view中,也没有对橘色视图进行removeFromSuperview,这些方法都封装在这个类方法中隐式进行了。
Demo示例点击打开链接
来源:https://www.cnblogs.com/iosblogx/p/4474358.html