modestmaps-js

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Try pinching to zoom on iPhone/iPad. It stutters pretty badly and gets stuck a lot, meaning you can't zoom in/out again unless you let go and start pinching again.

Trying to debug this...the touchmove event seems to stop getting triggered when it hits the next/previous zoom level. The issue also seems to be intermittent.

I moved all the touches listener to document.body, no luck, doesn't seem to matter.

Is there a way to not update the tiles until touchend happens? I think that might be what's causing the issue.

The code that zooms the tiles and the one that updates them are a little convoluted. I am not familiar enough with the codebase to fix this.

@pixelfreak - I'll be working on this area and addressing this in the #84 ticket. If you want to de-convolute the code, go for it.

I did some standalone experiment and confirmed that the culprit is the map updating the tiles on touchmove. Delaying the updates until touchend solves it.

@pixelfreak try the ff branch: it defers tile loading and changes the CSS transforms strategy. Currently at the cost of Firefox & IE compatibility, but that should be fixable soon.