Incorrect width and height after rotation

Question

I have to draw a menu with section which have to supports rotate only on iPad.

When I start application first time on device everything is fine even if the device is in portrait or landscape mode.

After the rotation I receive wrong size for the view wich contain the cells.

 -(void)buildMenu:(UIInterfaceOrientation)interfaceOrientationValue{
        CGFloat padding    = 1;
        CGFloat widthCell  = 0;
        CGFloat heightCell = 0;

        int rowNo = 0;
        int columnsNo = 0;
        int goToNextRow = 0; // used when we draw the menu - start drawing cell to the next row in menu

        if((interfaceOrientationValue == UIDeviceOrientationLandscapeRight) || (interfaceOrientationValue == UIDeviceOrientationLandscapeLeft)){//iPad Landscape - FH only for iPad support rotation

            rowNo = kLandscapeColumns;  //  2
            columnsNo = kLandscapeRows; //  3

            widthCell  = (self.viewMenuArea.frame.size.width/columnsNo-rowNo*padding);
            heightCell = (self.viewMenuArea.frame.size.height/rowNo-padding);

            goToNextRow = columnsNo; // go to the next line/row when we were draq the cell 4.

        }else{//iPad || iPhone - Portrait
            rowNo = kPortraitRows; //2
            columnsNo = kPortraitColumns; //3

            widthCell  = (self.viewMenuArea.frame.size.width/rowNo-padding);
            heightCell = (self.viewMenuArea.frame.size.height/columnsNo-padding);

            goToNextRow = rowNo; // go to the next line/row when we were draq the cell 3.
        }

        //Draw Menu Cells
        CGFloat x = 0;
        CGFloat y = 0;
        int itemsCount  = 1;

        for(int i=0; i<self.dataSource.count; i++){
             [FHMenuCell buildMenuCell_initWithTitle:[self.dataSource objectAtIndex:i] isDisabled:NO xOrigin:x yOrigin:y width:widthCell height:heightCell pendingItems:0 owner:self container:self.viewMenuArea delegate:self tag:i];

            if (itemsCount % goToNextRow == 0){
                y += heightCell + padding;
                x = 0;
            }else{
                x += widthCell+padding;
            }

            itemsCount++;
        }
    }

I call this methods in viewwillappear and after when user rotate the device in didRotateFromInterfaceOrientation.

I added a printscreen with the self.viewMenuArea in xib.

Any advice regarding the correct frame of the view which contain the cells (self.viewMenuArea)?

Answer 1

Possibly, you've mixed such enums as UIDeviceOrientation and UIInterfaceOrientation. First of all, try to change

    if((interfaceOrientationValue == UIDeviceOrientationLandscapeRight) || (interfaceOrientationValue == UIDeviceOrientationLandscapeLeft)){

to

    if(UIInterfaceOrientationIsLandscape(interfaceOrientationValue)) {

You should also pay attention to the autoresizing masks/ autolayout constraints set in your XIB/storyboard, it may affect the frame of your viewMenuArea. Just to be sure that those won't affect your viewMenuArea, remove all of them from that view in XIB/storyboard and try again. the view's frame shouldn't change.

Other than that, it's a good practice to separate view from viewController and implement all the layout stuff in its `layoutSubviews' method.