ios - Set anchor point in UICollectionViewLayoutAttributes -

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i want perform transform animation in uicollectionviewlayout. achieved can't find way set anchorpoint of uicollectionviewlayoutattributes. want perform door opening , closing animation while collection view item inserted

-(uicollectionviewlayoutattributes *)initiallayoutattributesforappearingitematindexpath:(nsindexpath *)itemindexpath{     uicollectionviewlayoutattributes *attributes = [super initiallayoutattributesforappearingitematindexpath:itemindexpath];     attributes.alpha = 1.0;     cgfloat progress = 0.0;     catransform3d transform = catransform3didentity;     transform.m34 = -1.0/500.0;     cgfloat angle = (1 - progress) * m_pi_2;      transform = catransform3drotate(transform, angle, 0, 1, 0  );     uicollectionviewcell *cell = [self.collectionview    cellforitematindexpath:itemindexpath];     cell.hidden = yes;      attributes.transform3d = transform;     return attributes; }

there doesn't seem anchorpoint attribute in uicollectionviewlayoutattributes, you'll have subclass it, add property anchorpoint , use applylayoutattributes on uicollectionviewcell set anchorpoint value on cell.


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