I'm building an iOS wrapper application for a web page, which was built using Bootstrap, at the top of my web app is a .navbar div, not fixed or anything and displays perfectly on first load.
The problem starts when I touch an input, type and then hide the keyboard. Once the keyboard has hidden the page has been moved back down, but the navbar is nowhere to be seen.
It turns out this was caused by a bug in the CSS code which gave a margin to the body. The simplest way to fix this was to change the CSS. Although I'm still none-the-wiser as to how control the UIWebView in such situations.
I'm having an issue with KendoUI charts which started occurring on iOS 6 devices, which I have reproduced in Safari, Chrome and Mercury.
When a user performs a "taphold" action (touching the screen and keeping the finger pressed for about a second) over an element, the element is highlighted in blue and the "copy/select/select all" context menu is brought up, as shown in the following screenshot.
This seems to occur for any type of element so it is not necessarily a KendoUI issue, but in case anyone else has encountered this, I would like to know if it is possible to somehow disable this feature. I've tried using the jQuery .disableSelection() method, but to no avail.
The reason for needing to fix this is that my app has some functionality bound to the jQuery mobile "taphold" event when performed on a chart, and the selection of the chart or one of its elements, along with the context menu appearing, can be distracting and confusing for the user.
Thanks!
Try the css rule -webkit-user-select:
-webkit-user-select: none;
I'm sure I'm not the only person asking this question. When you have a jQuery UI implementation, and you use the .buttonset(); command to turn a set of checkboxes into a button-set (multi selectable), I'm having trouble when a user de-selects an item after selecting it.
So let's say on hover, it turns into a certain colour (based on the settings of the jQueryUI theme I downloaded), and after clicking, it turns into the active state colour. When I click the same item again, and move the mouse away, it remains the hover colour, causing confusion as to whether the item is deselected or not.
And this only happens on Firefox only - seems to work fine on Chrome & Safari.
Here's a demo link: http://www.tylervolker.com/mls-search
I tried to force a blur() event to these items but no dice it seems.
$('.label').click(function(){
$(this).blur();
});
What am I missing? Or is this just a Firefox thing I need to live with until either jQueryUI updates their code, or Firefox appends this?
This appears to be this known jQuery UI bug - http://bugs.jqueryui.com/ticket/5518. The button widget isn't set to be addressed by the jQuery UI dev team until 1.11 so I wouldn't expect a fix for this anytime soon.
There are some suggested workarounds in the related issues on that ticket.
I am developing a Phonegap app for the major os platforms and am currently testing it on an iPad with iOS 5. Im using jquery mobile. So for large screens i've used the splitview jquery mobile plugin. http://asyraf9.github.com/jquery-mobile/
I've put a
$scrollArea.css('overflow-y','auto');
$scrollArea.css('-webkit-overflow-scrolling','touch');
to make the page scroll instead of using iscroll like the plugin was using. Now whats happening, is that the page isn't loading/repainting as the user scrolls. I have a list of 100 items and i scroll through them. The scrolling itself isn't slow, but it takes almost a full second for the new list view rows to pop into view after it has been scrolled. Before that it's a blank area.
On observing, i can see that the the list items don't pop into view until the scrolling has come to a halt. (momentum scroll)
A similar issue is here http://forum.jquery.com/topic/help-with-slow-list-view-scrolling-on-ipad-when-scrolling-in-an-overflow-auto-div
What can i do to make this work normally?? The same thing works fine on android tabs. pls help.
EDIT: If i use only
$scrollArea.css('overflow-y','auto');
then i dont face this issue of momentary blank areas after scrolling, but then the scrolling is painfully slow.
Please don't suggest using iScroll. Already tried that. its much much slower that what i get with -webkit-overflow-scrolling, and i cant use it.
My Approach
So, I tried a lot and I read even more about this problem. I ended up with a solution which is "OK" to me (because it works), but which is definitely not near to "perfect".
When using this CSS:
.container {
overflow: scroll;
-webkit-overflow-scrolling: touch;
}
you run into a lot of problems when having a complex design (in my case a fullscreen background image), and it gets even worse, when using absolute positioned elements and iframes. (Which is - of course - both the case I needed).
So, what did the trick? Basicly this CSS:
.container > * {
-webkit-transform: translate3d(0,0,0);
}
With this rule the content was almost all the time rendered right away without getting those blank areas. Only when scrolling down the first time very fast it's a little flickering.
But be careful with the rule -webkit-transform: translate3d(0,0,0);. Using this rule heavily on many child elements forced Safari to: sometimes slow down but almost all the time to crash. The best thing is to wrap all content elements into a single div, works fine.
Done? Not really. There is still the iframe-issue: ("argh")
iframe
When the iframe is not fully in the visible part of the container at the start it gets cropped or is not even displayed at all. This could sometimes also occur when scrolling around. So, I tried to force Safari to re-render this part anytime scrolling is completed and came up with this:
//using jQuery
var container = $('#container');
var iframe = $('#iframe');
container.scroll( function (event) {
iframe.css( 'marginLeft', 1 );
setTimeout( function() {
iframe.css ( 'marginLeft', 0 );
}, 1 );
});
The thing with the scroll event on a touch device is, that it's only triggered when the scrolling has come to an end, so this function is not fired at anytime but when the momentum has come to an end. The short movement is actually not visible.
So, maybe this is helpful for somebody.
Further information
Here a few more links on this issue:
On how the scroll event is fired in iOS:
javascript scroll event for iPhone/iPad?
Bug report of this problem to Apple:
https://stackoverflow.com/a/7893031/1456376
iframe example with the same problem:
https://stackoverflow.com/a/8275972/1456376
We have used the plugin below in our project, did you try this one out?
https://github.com/jquery/jquery-mobile/tree/master/experiments/scrollview
On iOS it uses hardware acceleration to render the scrolling. It is rather easy to use, all you have to do is to assign an additional class to your div.
We did have some issues on Android 2 with this plugin, to overcome those issues we changed the scrollMethod property in jquery.mobile.scrollview.js.
I hope it helps you solve your scrolling problem
I got a video element on a page that's working fine both in safari mobile and desktop.
I have a seme-transparent pull-down menu that's working fine. The problem is, when the menu is over the video element, on the desktop safari i can see the video under the menu (as desired), while on the mobile version the video element stay on the foreground (ugly) no matter what i tell the css. Is there any workaround?
The issue only occurs if the video element was dynamically created. If the element was just in the page as it loaded, z-index works fine.
You can fix z-index on dynamically created videos by giving the video element -webkit-transform-style: preserve-3d.
Yep, it's as bad as haslayout on IE!
Unfortunately not.
Based on my experience and understanding of how iOS currently works, this isn't possible.
Mobile Safari on the iPad cuts a hole for a Quicktime window , which plays back the video using the built in hardware acceleration to improve battery life. (The iPhone and iPod Touch just open it up in a separate window to achieve the same effect.)
This window doesn't play nicely with the other HTML on the page. In fact, I haven't found a way to get mobile Safari to display anything on top of a tag. My guess is that this is because the hardware acceleration only allows for video scaling and positioning, and that it's only able to handle one video at a time.
I'm using flowplayer and a simple CSS dropdown menu and had the same problem.
I have drop down menu that, when tapped, covers part of the video area. The submenu shows up over the video as expected, but no touch events were being sent.
I fixed it by combining a couple of suggestions from others answering this question: I set visibility:hidden when opening the menu and visibility:visible when closing the submenu, AND set the -webkit-transform-style:preserve-3d CSS property on the video.
Here's the pertinent code. I left out the CSS for the menubar, but it does what you might expect - resulting in a menu that covers portions of the video.
menu and video HTML
<div id='nav'>
<ul>
... <!-- bunch of ul/li stuff here for the menu and submenus -->
</ul>
</div>
<div id='videoplayer'><!-- for flowplayer --></div>
CSS
video {
-webkit-transform-style: preserve-3d;
}
Javascript
$(document).ready(function(){
$("#nav li").hover(
function() {
$(this).find('ul:first').css({visibility: "visible",display: "none"}).fadeIn(300);
$("video").css({visibility:"hidden"});
},
function(){
$(this).find('ul:first').css({visibility: "hidden"});
$("video").css({visibility:"visible"});
}
);
);
I have managed to place a menu div over a html5 video tag in mobile-safari on the ipad. To be honest I didn't have any problems and it just worked. It could be though because I was using CSS3 animations and therefore the GPU? You could try using a hack to add an element to the GPU. If you put -webkit-transform: translateZ(0); on the element it should force it to use the GPU...
When you have an element you want to be in front of your <video> in Safari, you need to set into that element the transform: translateZ(1px) or more pixels, as Safari is setting to your <video> element a 0 value for Z axis (transform: translateZ(0)).
This is the only thing it worked to me. No z-index, no transform-style:preserve-3d.
I ran into this also. The only thing that I could get to work for me was to add
display:none
to the video tag when showing a div over it that needed to be clicked on.
-webkit-transform-style:preserve-3d and -webkit-transform:translateZ(0) didn't work for me.
Using Flowplayer with the ipad plugin and the controlbar plugin allowed me to remove the ipad created control bar and replace it with something that can be z-indexed below my modal windows.
You can fix z-index on dynamically created videos by giving the video element -webkit-transform-style: preserve-3d.
This worked for me with a dynamically created video element. I also set the z-index of the over-laying div to z-index: 888; which may also have helped.
I had this problem which was occurring on mobile devices with an off canvas menu. When the menu was over the video you could not tap any of the menu items.
I fixed it my moving the video somewhere else when the menu was on by positioning it absolutely at -100000px when the menu was not displayed it set it back being positioned relatively.
I found using display none did not work as when you set it to block again the video would not work.
I also tried setting the height to 0 - this did not work as the video still seemed to take up the space even though you couldn't see it.
The final method seems a bit extreme but it is not really noticeable when it is being used.
This is the code that will work on both the iPad and iPhone. I tried removing the controls and then add them again, but this worked only on iPad not on iPhone. After remove the opacity and then add it again it worked on iPhone also.
$("#overlay_open").click(function(){
$("video").prop("controls", false);
$("video").css("opacity", 0);
});
$("#overlay_close").click(function(){
$("video").prop("controls", true);
$("video").css("opacity", 1);
});
Just ran into this issue today & had to cobble together a solution from multiple answers since none fully handled the problem ...
I have video elements in a collapsed "table view" style list that were capturing touch events on iPhone when trying to tap on other list items. On iPhone the videos would play when tapping other collapsed elements that happened to be occupying the same spot on screen.
Fixing this required all of the following:
1) Using this:
video{
-webkit-transform-style: preserve-3d;
}
... didn't seem to have any effect, but I left it in anyway. Everything's working now so I don't want to screw with it further :)
2) Toggling visibility: hidden alone didn't work, and display:none didn't work as expected.
3) In addition to "visibility" the HTML5 video tag controls attribute also has to be added/removed dynamically. Either:
$("video").css({visibility:"hidden"}).removeAttr("controls"); or $("video").css({visibility:"visible"}).attr("controls", "controls");
4) Must set visibility/controls on document load based on initial browser/screen size
5) Although the main concern was the screwy iPhone behavior, I also had to account for responsive window size changes above my smallest media query breakpoint of 600px - otherwise the videos would appear/disappear at the wrong screen sizes.
$(window).resize(function(){
if ($(window).width() > 600){
$("video").css({visibility:"visible"}).attr("controls", "controls");
}
});
Quite a pain to work around what's essentially a stupid mobile Safari bug... I sure hope it works on iPad when I test it later...
For anyone running into issues with this still, another fix that ended up working for me was to change the options in the embed code to not allow controls, suggested videos, and video title and player options. I added a simple Modernizr.MQ query to change the src for tablet and mobile, and included the following to the iframe src for mobile:
?rel=0&controls=0&showinfo=0
I never completely tracked down why this works, but my guess is that the controls have some user-agent style that gives them a high z-index and makes the element sit on top of everything.