iOS开发中如何实现想要的动画效果
今天主要用到的动画类是CALayer下的CATransition至于各种动画类中如何继承的在这也不做赘述，网上的资料是一抓一大把。好废话少说切入今天的正题。
一.封装动画方法
1.用CATransition实现动画的封装方法如下，每句代码是何意思，请看注释之。
#pragma CATransition动画实现
- (void) transitionWithType:(NSString *) type WithSubtype:(NSString *) subtype ForView : (UIView *) view
{
//创建CATransition对象
CATransition *animation = [CATransition animation];
//设置运动时间
animation.duration = DURATION;
//设置运动type
animation.type = type;
if (subtype != nil) {
//设置子类
animation.subtype = subtype;
}
//设置运动速度
animation.timingFunction = UIViewAnimationOptionCurveEaseInOut;
[view.layer addAnimation:animation forKey:@"animation"];
}
代码说明：
CATransition常用的属性如下：
duration:设置动画时间
type:稍后下面会详细的介绍运动类型
subtype:和type匹配使用，指定运动的方向，下面也会详细介绍
timingFunction ：动画的运动轨迹，用于变化起点和终点之间的插值计算,形象点说它决定了动画运行的节奏,比如是
均匀变化(相同时间变化量相同)还是先快后慢,先慢后快还是先慢再快再慢.
* 动画的开始与结束的快慢,有五个预置分别为(下同):
* kCAMediaTimingFunctionLinear 线性,即匀速
* kCAMediaTimingFunctionEaseIn 先慢后快
* kCAMediaTimingFunctionEaseOut 先快后慢
* kCAMediaTimingFunctionEaseInEaseOut 先慢后快再慢
* kCAMediaTimingFunctionDefault 实际效果是动画中间比较快.
2.用UIView的block回调实现动画的代码封装
#pragma UIView实现动画
- (void) animationWithView : (UIView *)view WithAnimationTransition : (UIViewAnimationTransition) transition
{
[UIView animateWithDuration:DURATION animations:^{
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
[UIView setAnimationTransition:transition forView:view cache:YES];
}];
}
3.改变View的背景图，便于切换时观察
#pragma 给View添加背景图
-(void)addBgImageWithImageName:(NSString *) imageName
{
self.view.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:imageName]];
}
二.调用上面的方法实现我们想要的动画
1.我们在View上添加多个Button,给不同的Button设置不同的Tag值，然后再ViewController中绑定同一个方法，点击不同的button实现不同的页面切换效果。
2.下面我们就开始编写点击button要回调的方法
(1).定义枚举来标示按钮所对应的动画类型，代码如下：
typedef enum : NSUInteger {
Fade = , //淡入淡出
Push, //推挤
Reveal, //揭开
MoveIn, //覆盖
Cube, //立方体
SuckEffect, //吮吸
OglFlip, //翻转
RippleEffect, //波纹
PageCurl, //翻页
PageUnCurl, //反翻页
CameraIrisHollowOpen, //开镜头
CameraIrisHollowClose, //关镜头
CurlDown, //下翻页
CurlUp, //上翻页
FlipFromLeft, //左翻转
FlipFromRight, //右翻转
} AnimationType;
(2),获取Button的Tag值：
UIButton *button = sender; AnimationType animationType = button.tag;
(3).每次点击button都改变subtype的值，包括上,左,下,右
NSString *subtypeString;
switch (_subtype) {
case :
subtypeString = kCATransitionFromLeft;
break;
case :
subtypeString = kCATransitionFromBottom;
break;
case :
subtypeString = kCATransitionFromRight;
break;
case :
subtypeString = kCATransitionFromTop;
break;
default:
break;
}
_subtype += ;
if (_subtype > ) {
_subtype = ;
}
(4),通过switch结合上边的枚举来判断是那个按钮点击的
switch (animationType)
{
//各种Case,此处代码下面会给出
}
3.调用我们封装的运动方法，来实现动画效果
(1),淡化效果
case Fade: [self transitionWithType:kCATransitionFade WithSubtype:subtypeString ForView:self.view]; break;
(2).Push效果
case Push: [self transitionWithType:kCATransitionPush WithSubtype:subtypeString ForView:self.view]; break;
(3).揭开效果：
case Reveal: [self transitionWithType:kCATransitionReveal WithSubtype:subtypeString ForView:self.view]; break;
(4).覆盖效果
case MoveIn: [self transitionWithType:kCATransitionMoveIn WithSubtype:subtypeString ForView:self.view]; break;
(5).立方体效果
case Cube: [self transitionWithType:@"cube" WithSubtype:subtypeString ForView:self.view]; break;
(6).吮吸效果
case SuckEffect: [self transitionWithType:@"suckEffect" WithSubtype:subtypeString ForView:self.view]; break;
(7).翻转效果
case OglFlip: [self transitionWithType:@"oglFlip" WithSubtype:subtypeString ForView:self.view]; break;
8.波纹效果
case RippleEffect: [self transitionWithType:@"rippleEffect" WithSubtype:subtypeString ForView:self.view]; break;
(9).翻页和反翻页效果
case PageCurl: [self transitionWithType:@"pageCurl" WithSubtype:subtypeString ForView:self.view]; break; case PageUnCurl: [self transitionWithType:@"pageUnCurl" WithSubtype:subtypeString ForView:self.view]; break;
(10).相机打开效果
case CameraIrisHollowOpen: [self transitionWithType:@"cameraIrisHollowOpen" WithSubtype:subtypeString ForView:self.view]; break; case CameraIrisHollowClose: [self transitionWithType:@"cameraIrisHollowClose" WithSubtype:subtypeString ForView:self.view]; break;
(11),调用上面封装的第二个动画方法
case CurlDown: [self animationWithView:self.view WithAnimationTransition:UIViewAnimationTransitionCurlDown]; break; case CurlUp: [self animationWithView:self.view WithAnimationTransition:UIViewAnimationTransitionCurlUp]; break; case FlipFromLeft: [self animationWithView:self.view WithAnimationTransition:UIViewAnimationTransitionFlipFromLeft]; break; case FlipFromRight: [self animationWithView:self.view WithAnimationTransition:UIViewAnimationTransitionFlipFromRight]; break;
不知道小编所整理的iOS开发中如何实现想要的动画效果内容，有没有哪些朋友是没看懂的，如果不懂，记得第一时间来爱站技术频道网站给小编留言。
