iOS6 webkit timer bug workaround

ios6-timers.js

(function (window) {
	// This library re-implements setTimeout, setInterval, clearTimeout, clearInterval for iOS6.
	// iOS6 suffers from a bug that kills timers that are created while a page is scrolling.
	// This library fixes that problem by recreating timers after scrolling finishes (with interval correction).
	// This code is free to use by anyone (MIT, blabla).
	// Original Author: [email protected]
	var timeouts = {};
	var intervals = {};
	var orgSetTimeout = window.setTimeout;
	var orgSetInterval = window.setInterval;
	var orgClearTimeout = window.clearTimeout;
	var orgClearInterval = window.clearInterval;
	// To prevent errors if loaded on older IE.
	if (!window.addEventListener) return false;
	// This fix needs only for iOS 6.0 or 6.0.1, continue process if the version matched.
	if (!navigator.userAgent.match(/OS\s6_0/)) return false;
	function createTimer(set, map, args) {
		var id, cb = args[0],
			repeat = (set === orgSetInterval);

		function callback() {
			if (cb) {
				cb.apply(window, arguments);
				if (!repeat) {
					delete map[id];
					cb = null;
				}
			}
		}
		args[0] = callback;
		id = set.apply(window, args);
		map[id] = {
			args: args,
			created: Date.now(),
			cb: cb,
			id: id
		};
		return id;
	}

	function resetTimer(set, clear, map, virtualId, correctInterval) {
		var timer = map[virtualId];
		if (!timer) {
			return;
		}
		var repeat = (set === orgSetInterval);
		// cleanup
		clear(timer.id);
		// reduce the interval (arg 1 in the args array)
		if (!repeat) {
			var interval = timer.args[1];
			var reduction = Date.now() - timer.created;
			if (reduction < 0) {
				reduction = 0;
			}
			interval -= reduction;
			if (interval < 0) {
				interval = 0;
			}
			timer.args[1] = interval;
		}
		// recreate
		function callback() {
			if (timer.cb) {
				timer.cb.apply(window, arguments);
				if (!repeat) {
					delete map[virtualId];
					timer.cb = null;
				}
			}
		}
		timer.args[0] = callback;
		timer.created = Date.now();
		timer.id = set.apply(window, timer.args);
	}
	window.setTimeout = function () {
		return createTimer(orgSetTimeout, timeouts, arguments);
	};
	window.setInterval = function () {
		return createTimer(orgSetInterval, intervals, arguments);
	};
	window.clearTimeout = function (id) {
		var timer = timeouts[id];
		if (timer) {
			delete timeouts[id];
			orgClearTimeout(timer.id);
		}
	};
	window.clearInterval = function (id) {
		var timer = intervals[id];
		if (timer) {
			delete intervals[id];
			orgClearInterval(timer.id);
		}
	};
	//check and add listener on the top window if loaded on frameset/iframe
	var win = window;
	while (win.location != win.parent.location) {
		win = win.parent;
	}
	win.addEventListener('scroll', function () {
		// recreate the timers using adjusted intervals
		// we cannot know how long the scroll-freeze lasted, so we cannot take that into account
		var virtualId;
		for (virtualId in timeouts) {
			resetTimer(orgSetTimeout, orgClearTimeout, timeouts, virtualId);
		}
		for (virtualId in intervals) {
			resetTimer(orgSetInterval, orgClearInterval, intervals, virtualId);
		}
	});
}(window));

All you need to work this fix is just load the file on the head with script tag.
This fix may affect other non-bug devices, though, load & append it
if (iOS6) { // check iOS6 with your custom flag
$('head').append('<script type="text/javascript" src="ios6-timers.js"></script>');
}

I have checked this bug on iOS 6.0.1, but the problem is still remaining.

This worked for me! touchswipe froze when resizing (scrolling/zooming) a page on iphone4 with iOS6. I saved this code as a js file and included it in my page in which i use a SudoSlider with TouchSwipe. Now i can resize and scroll the page and the swiping on the slider keeps working.

Ur a hero. Thank u

I seem to be getting this error in console:
TypeError: 'undefined' is not a function (evaluating 'timer.cb.apply(window, arguments)')

any ideas?

edit

nasty work around with browser sniffing wrap the above in:
if((navigator.userAgent.match(/(iPhone|iPod|iPad)/i))) {
}

Apparently, Apple fixed this problem on iOS 6.1 released today.
You can check whether fixed or not by the page below

https://gist.github.com/4661261

Hi.. I have added the fix.js in my header and issue seems to be fixed. But my images are inside a link (anchor tag), while clicking the image, its not redirecting. Just showing the loading icon and nothing happens after that. Please, need help on this :(

Added useragent check in order to fix the issue only on iOS 6 or 6.0.1.

Hi.. Thanks for your valuable help and sorry for the late response from my end. I have updated the code, but still its not working for me. Redirection is not working. I am using iOS 6.0.1. Same issue in android 4.0.4 also. Please need help :(

@sarathrajan HI, I think you should post your comment on https://github.com/malsup/cycle2/issues this project's issues section, not here.

This is my own gist post, and have no relation with malsup/cycle2 project.
And, I guess your problem is not caused my gist. I hope you could find the answer there :)

Hi kTmnh, Thanks for your response. But I am getting this link issue only after adding this ios6-timers.js. So can you suggest me a solution for this. Thanks in advance for all your help :)

@sarathrajan I see. Is there anywhere I can review your code? Please let me know the page you have error you mention, I think I could help you.

@kTmnh, My site is not yet live. So unfortunately cant review my code now. What I am having is a slideshow of images. I am using cycle 2 for this slideshow. All my images are given links to their respective pages. But I am getting issue in the slideshow after a 'L' shaped swipe. And I added this js to fix this. It worked fine after adding ur js. But unfortunately when i click the image, its not redirecting to its page. I am in a critical situation :( .If its not working, i need to use some other plugin for this slideshow. :( But I would like to use the awesome cycle 2 itself. Is there any way to fix this issue?

Hi kTmnh, Can you give me a solution for this please :(

Not able to fix this issue.. :( I am planning to use another plugin. :(