- (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];
}
