CODEWITHSUNDEEP
javascriptjqueryipad
user578895
user578895

Reputation:

ipad : event.touches is randomly undefined?

I have some simple code that is controlling a slider control on an iPad. I'm running into an issue where the control is jumping around wildly and I traced it down to the fact that ev.originalEvent.touches is sometimes undefined...

Wondering if anyone has any idea what might be going on here. jQuery 1.7.2, iOS5.1, iPad 3 if it matters

$( document.body )
    .on( 'mousemove touchmove', function( ev ){
        // logs undefined about 10% of the time???
        console.log( ev.originalEvent.touches );
    } );

And of course I can't re-produce this in a simple stripped-down case, though this is the exact code that's running: http://jsfiddle.net/vYKhh/4/

Upvotes: 1

Views: 1334

Answers (1)

jbflamant
jbflamant

Reputation: 26

It seems that when you are using the 'touchmove' or 'mousemove' event the touches array is 'ev.touches' so try this:

$( document.body )
.on( 'mousemove touchmove', function( ev ){
    // logs undefined about 10% of the time???
    console.log( ev.touches );
} );

But for 'mousedown' and 'touchstart' it's still ev.originalEvent.touches.

Upvotes: 1

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