iOS开发中如何实现想要的动画效果

来自:互联网
时间:2023-04-15
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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;
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