UIView frame origin doesn't set good

Question

Hi guys!

Here is my code:

    frame = _pageContentView.frame;
    NSLog(@"%f; %f; %f; %f;", frame.origin.x, frame.origin.y, frame.size.width, frame.size.height);
    frame.size.height = pageContentView.frame.size.height;
    NSLog(@"%f; %f; %f; %f;", frame.origin.x, frame.origin.y, frame.size.width, frame.size.height);
    _pageContentView.frame = frame;
    NSLog(@"%f; %f; %f; %f;", _pageContentView.frame.origin.x, _pageContentView.frame.origin.y, _pageContentView.frame.size.width, _pageContentView.frame.size.height);

And the NSLog outputs these values:
0.000000; 0.000000; 317.648956; 0.000000;
0.000000; 0.000000; 317.648956; 768.000000;
0.000007; 0.000004; 317.648956; 768.000000;

Can you see? In the last row the x and y coordinates are a bit crazy... Where do these number come frome? What's the problem here?

Answer 1

Some math is done to your zeroes; turning them, effectively, into 0.change. Note, however, that the irregularity represents a drift of 0.0007%. It's really nothing to worry about. You can safely ignore anything after the first digit after the period, or two digits if you are moving the views around alot.