(iphone) how to set view.center when detaching a view from scroll view and adding it to another view?

I'd like to move a view from a scrollview to a uiview.

I'm having trouble changing it's center(or frame) so that it remains in the same position in screen (but in a different view, possibly the superview of scrollview).

How should I convert the view's center/frame?

Thank you.

EDIT:

   CGPoint oldCenter = dragView.center;                                                                         
    CGPoint newCenter = [dragView con开发者_运维技巧vertPoint: oldCenter toView: self.navigationView.contentView];    
    dragView.center = newCenter;
    [self.navigationView.contentView addSubview: dragView];

I can also use (NSSet*) touches since i'm in touchesBegan:

I was having hard time to make it work but the doc wasn't so clear to me.

You can use convertPoint:toView: method of UIView. It is used to convert a point from one view's coordinate system to another. See Converting Between View Coordinate Systems section of UIView class reference. There are more methods available.

-edit-

You are using the wrong point when calling convertPoint: method. The given point should be in dragView's coordinate system where as dragView.center is in its superview's coordinate system.

Use the following point and it should give you the center of dragView in its own coordinate system.

CGPoint p;
p = CGPointMake(dragView.bounds.size.width * 0.5, dragView.bounds.size.height * 0.5);