ios - why attributes properties in layoutAttributesForItemAtIndexPath does not get applied? -

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if modified attribute property in layoutattributesforitematindexpath collectionview cell not modified 

-(uicollectionviewlayoutattributes *)layoutattributesforitematindexpath:(nsindexpath *)indexpath

{ uicollectionviewlayoutattributes *attributes = [super layoutattributesforitematindexpath:indexpath];

//this properties not applied attributes.zindex = 1; attributes.alpha = 0.5;  return attributes;

}

but when moving properties modifications layoutattributesforelementsinrect gets applied:

-(nsarray *)layoutattributesforelementsinrect:(cgrect)rect

{ nsarray *attributesarray = [super layoutattributesforelementsinrect:rect];

for (uicollectionviewlayoutattributes *attributes in attributesarray) {     //this properties getting applied here     attributes.zindex = 1;     attributes.alpha = 0.5;  } return attributesarray;

}

i'am applying uipangesturerecognizer on uicollectionview , want apply these properties on cell i'am dragging .

i'am apple call layoutattributesforitematindexpath method while i'am dragging through calling method 

[customlayoutinstance indexofitemselected:indexpath.row];

layoutattributesforitematindexpath called long i'am dragging properties not applied.

you should override 1 more method:

- (nsarray *)layoutattributesforelementsinrect:(cgrect)rect {  {

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