Best way to implement view like map

Question

I'm making view that represent something like map, with pan and pinch gestures. At current moment it's implemented via overriden drawRect that called in handlePan with setNeedsDisplay. So, the resulting performance a little bit awkward. Is there any more appropriate approaches?

Have you had a look at the CATiledLayer class? It sound like this would solve your issue, but may be a bit more complicated. Documentation: https://developer.apple.com/library/ios/documentation/GraphicsImaging/Reference/CATiledLayer_class/index.html . There are a lot of tutorials on how to use it properly, just use a search engine :) — tomalbrc, Dec 30 '14 at 21:21

score 0 · Accepted Answer · answered Jan 05 '15 at 15:03

So, more appropriate solution here is UIScrollView.

To get it work:

Set up scrollView delegate, like

scrollView.delegate = self

Implement

func viewForZoomingInScrollView(scrollView: UIScrollView) -> UIView?
{
    return fieldView
}

Optionally, you can set

scrollView.minimumZoomScale = scrollView.frame.width / fieldView.frame.width scrollView.maximumZoomScale = 2

Where fieldView is target custom view:

fieldView = FieldView(frame: frameRect)

scrollView.addSubview(fieldView)

scrollView.contentSize = frameRect.size

Best way to implement view like map

1 Answers1