iOS動(dòng)畫(huà)特效之立方體翻轉(zhuǎn)

更新時(shí)間：2016年08月03日 11:18:02 作者：小明大神

今天起為大家?guī)?lái)iOS動(dòng)畫(huà)特效合集之立方體翻轉(zhuǎn)，APP如美女，動(dòng)畫(huà)如衣裳，趕緊為她披上漂亮的衣裝吧！

先來(lái)看看效果：

下面進(jìn)入正題，是時(shí)候展現(xiàn)真正的技術(shù)了：

首先在控制器里添加一個(gè)scrollView，再在scrollView上的對(duì)應(yīng)位置上添加要展示的imageView(立方體視圖組)，當(dāng)然也可以放上其它子控制器的view實(shí)現(xiàn)更多功能這個(gè)隨意不是重點(diǎn)

//*******添加scrollView*******
  [self createScrollView];

//******創(chuàng)建立方體視圖組******
  [self createCubicViewArray];

//添加視圖到scrollView上
  for (int i=0; i<_viewArray.count; i++) {

    UIImageView *transView=_viewArray[i];

    //視圖在scrollView上對(duì)應(yīng)的位置
    transView.x=self.view.bounds.size.width * i;

監(jiān)聽(tīng)scrollView的滑動(dòng)事件，在這里要先獲取到顯示的當(dāng)前頁(yè)、上一頁(yè)、下一頁(yè)，然后讓這三個(gè)頁(yè)面同時(shí)做3DTransform變換

#pragma mark - scrollView滑動(dòng)事件
-(void)scrollViewDidScroll:(UIScrollView *)scrollView{

  //當(dāng)前頁(yè)數(shù)
  NSInteger currentPage=_currentPage;

  //當(dāng)前視圖
  UIView *currentView=_viewArray[currentPage];

  //上一個(gè)視圖
  UIView *lastView=nil;

  if (currentPage-1>=0) {

    lastView=_viewArray[currentPage-1];
  }

  //下一個(gè)視圖控制器視圖
  UIView *nextView;

  if (currentPage+1<=3) {

    nextView=_viewArray[currentPage+1];
  }

  //本次偏移距離
  CGFloat currentOffset=scrollView.contentOffset.x-currentPage*self.view.bounds.size.width;

  //本次偏移角度
  CGFloat deltaAngle=currentOffset/self.view.bounds.size.width * M_PI_2;

  //****************當(dāng)前視圖移動(dòng)變幻***************

  //設(shè)置錨點(diǎn)
  currentView.layer.anchorPoint=CGPointMake(0.5, 0.5);

  //向屏幕前方移動(dòng)
  CATransform3D move = CATransform3DMakeTranslation(0, 0, self.view.bounds.size.width/2);

  //旋轉(zhuǎn)
  CATransform3D rotate = CATransform3DMakeRotation(-deltaAngle, 0, 1, 0);

  //平移
  CATransform3D plaintMove=CATransform3DMakeTranslation( currentOffset, 0, 0);

  //向屏幕后方移動(dòng)
  CATransform3D back = CATransform3DMakeTranslation(0, 0, -self.view.bounds.size.width/2);

  //連接
  CATransform3D concat=CATransform3DConcat( CATransform3DConcat(move, CATransform3DConcat(rotate, plaintMove)),back);

  CATransform3D transform=CATransform3DPerspect(concat, CGPointMake(currentOffset/2, self.view.bounds.size.height), 5000.0f);

  //添加變幻特效
  currentView.layer.transform=transform;

  //****************下一個(gè)視圖移動(dòng)變幻***************

  //設(shè)置錨點(diǎn)
  nextView.layer.anchorPoint=CGPointMake(0.5, 0.5);

  //向屏幕前方移動(dòng)
  CATransform3D move2 = CATransform3DMakeTranslation(0, 0, self.view.bounds.size.width/2);

  //旋轉(zhuǎn)
  CATransform3D rotate2 = CATransform3DMakeRotation(-deltaAngle+M_PI_2, 0, 1, 0);

  //平移
  CATransform3D plaintMove2=CATransform3DMakeTranslation( currentOffset-self.view.bounds.size.width, 0, 0);

  //向屏幕后方移動(dòng)
  CATransform3D back2 = CATransform3DMakeTranslation(0, 0, -self.view.bounds.size.width/2);

  //拼接
  CATransform3D concat2=CATransform3DConcat( CATransform3DConcat(move2, CATransform3DConcat(rotate2, plaintMove2)),back2);

  CATransform3D transform2=CATransform3DPerspect(concat2, CGPointMake(self.view.bounds.size.width/2+currentOffset/2, self.view.bounds.size.height), 5000.0f);

  //添加變幻特效
  nextView.layer.transform=transform2;

  //****************上一個(gè)視圖移動(dòng)變幻***************

  //設(shè)置錨點(diǎn)
  lastView.layer.anchorPoint=CGPointMake(0.5, 0.5);

  //向屏幕前方移動(dòng)
  CATransform3D move3 = CATransform3DMakeTranslation(0, 0, self.view.bounds.size.width/2);

  //旋轉(zhuǎn)
  CATransform3D rotate3 = CATransform3DMakeRotation(-deltaAngle-M_PI_2, 0, 1, 0);

  //平移
  CATransform3D plaintMove3=CATransform3DMakeTranslation( currentOffset+self.view.bounds.size.width, 0, 0);

  //向屏幕后方移動(dòng)
  CATransform3D back3 = CATransform3DMakeTranslation(0, 0, -self.view.bounds.size.width/2);

  //拼接
  CATransform3D concat3=CATransform3DConcat(CATransform3DConcat(move3, CATransform3DConcat(rotate3, plaintMove3)),back3);

  CATransform3D transform3=CATransform3DPerspect(concat3, CGPointMake(-self.view.bounds.size.width/2+currentOffset/2, self.view.bounds.size.height), 5000.0f);

  //添加變幻特效
  lastView.layer.transform=transform3;
}

這里記得要復(fù)原一下3D變換，不然滑快了會(huì)出現(xiàn)頁(yè)面錯(cuò)亂

-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{

  //改變選中頁(yè)序號(hào)
  [self changeIndex];

  //3D變幻恢復(fù)原狀態(tài)
  for (UIView * view in _viewArray) {

    view.layer.transform=CATransform3DIdentity;
  }
}

對(duì)了，記得添加一個(gè)很重要的透視變換函數(shù)，核心在于仿射矩陣的m34屬性，這樣才會(huì)產(chǎn)生遠(yuǎn)小近大的3D效果，讓動(dòng)畫(huà)更炫酷

//3D透視函數(shù)
CATransform3D CATransform3DMakePerspective(CGPoint center, float disZ)
{
  CATransform3D transToCenter = CATransform3DMakeTranslation(-center.x, -center.y, 0);
  CATransform3D transBack = CATransform3DMakeTranslation(center.x, center.y, 0);
  CATransform3D scale = CATransform3DIdentity;
  scale.m34 = -1.0f/disZ;
  return CATransform3DConcat(CATransform3DConcat(transToCenter, scale), transBack);
}

這一篇文章就到這里了，大家有什么意見(jiàn)和問(wèn)題記得及時(shí)反饋，希望本文對(duì)大家開(kāi)發(fā)IOS有所幫助。

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