Monday, 28 March 2016

Capturing touch events in iOS/Android webviews

I have some HTML content that is shared between a Xamarin Android app and an ObjC/Swift native iOS app. In the HTML are a few buttons that need to trigger events in the native code of each app. The techniques for capturing these events are well documented, but one has to remember that a touch event might actually be a scroll or a swipe, and the use may not be trying to 'click' the element in question. I overcame this problem by using a boolean flag to see if we're moving:
var moved;
$('.myElement').on('touchend', function(e){
    if(moved != true){
        //do your thing
}).on('touchmove', function(e){
    moved = true;
}).on('touchstart', function(){
    moved = false;

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