Add a parent uiview for MagnifyingView to fix landscape issue.

[xmkevin]

It took me hours to find out that the loupe is added to superview, therefore the loupe position is not correct in landscape mode.

[self.superview addSubview:magnifyingGlass];

Add a parent UIView for the magnifying view to fix this issue.

[vanderneut]

The loupe is on the superview, otherwise the loupe would be enlarging itself, resulting in some groovy effects you don't want :-)