• (void)collectionView:(UICollectionView *)collectionView willDisplayCell:(UICollectionViewCell *)cell forItemAtIndexPath:(NSIndexPath *)indexPath

{

CATransform3D rotation;//3D旋转

// rotation = CATransform3DMakeTranslation(0 ,50 ,20);

rotation = CATransform3DMakeRotation( M_PI_4 , 0.0, 0.7, 0.4);

//逆时针旋转

rotation = CATransform3DScale(rotation, 0.8, 0.8, 1);

rotation.m34 = 1.0/ 1000;

cell.layer.shadowColor = [[UIColor redColor]CGColor];

cell.layer.shadowOffset = CGSizeMake(10, 10);

cell.alpha = 0;

cell.layer.transform = rotation;

[UIView beginAnimations:@"rotation" context:NULL];

//旋转时间

[UIView setAnimationDuration:0.6];

cell.layer.transform = CATransform3DIdentity;

cell.alpha = 1;

cell.layer.shadowOffset = CGSizeMake(0, 0);

[UIView commitAnimations];

}