I visited mobile-apps-news on an iPad and noticed there's no way I can pinch-to-zoom, it's using a responsive layout - but I'm very curious to how they've blocked pinch zooming under iOS. It's definitely not Javascript.
Anyone know how they've done this?
Thanks!
It's a mobile safari web-kit property. The meta tag named view port has the ability to do so. It defines many parameter in which user-scalable = no value of Content parameter is what you are looking for. It prevents user from scaling the page just by adding a property to the meta tag. You can use the same tag to specify your initial scale and maximum zoom level. <meta name = "viewport" content = "user-scalable = no">. For more information, have a look at the safari developer guide.
Remember to add it with the right syntax, defining the content as well:
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
Related
I am developing a mobile web site using Sencha Touch. In iOS7 Safari I cannot make the top address bar & the toolbar below go away. Sencha used to handle this upto iOS6 but some recent changes in iOS7 is causing this issue.
http://java.dzone.com/articles/safari-ios-7-and-html5
I read the above link & it seems this is also an issue for HTML5 Games & a few other apps.
The old window.scrollTo() which worked for iOS6 no longer works.
Add minimal-ui in your meta tag viewport, this will hide he address bar and browser controls in safari iOS7:
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no, minimal-ui">
More info on iOS7 and fullscreen mode for mobile websites: http://blog.initlabs.com/post/81716286465/how-to-display-websites-in-fullscreen-mode-in-ios7
With iOS 7 I don't think you really have a choice. Obviously Apple doesn't want developers doing this anymore, and even if someone finds another workaround it probably won't stick around for that long.
Honestly, I think getting fullscreen functionality is a fair trade off for users to install the app to their home screen. Obviously there are certain cases where this isn't true, but I guess I find it understandable to some degree. You should still be able to add the following meta tag and it will be fullscreen once added to home screen:
<meta name="apple-mobile-web-app-capable" content="yes">
There are a few nice libraries out there that add an "add to homescreen" prompt that you can set up to be rather unobtrusive with custom messages. In this case, might be best to embrace the change...
Ahhh... I'm beginning to tire of the viewport tag.
Anyway, hopefully someone out there can assist with this question. I know similar questions have been asked on SO, and I've read quite a few of them, but they seem to be under different circumstances.
I have a DIV that is 100%x100%.
I've applied background-size:cover to the background image inside this div.
When testing in all browsers, I get a nice, pretty, full-screen background image that sizes with the browser window - as it should. Even on the ipad it will pull up and look great, in both orientations. :) Happy.
Now, as soon as I add the ridiculous viewport meta tag (which I'm foreseeing a lot of users slapping onto their websites alongside my script), the ipad revolts, unless it's exactly this:
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
As soon as I allow scaling of the page by changing the initial-scale or maximum-scale, the background-size cover breaks.
Any ideas?
Also, would it be a bad move to just remove the viewport meta tag in the script to avoid all of this together?
Thanks!
I have a simple page with
<meta name="viewport" id="extViewportMeta" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no">
on it, with everything sized nicely to display on an iPhone.
But when I put an iframe on that page, everything inside the iFrame is not zoomable, and scales to the size of the parent page.
How can I allow zooming within the iframe only, without messing with the rest of my page?
What you are requesting is unfortunately not possible.
First off, in you 'viewport' meta tag, your "content" attribute is specifying that the user of your website CAN NOT zoom at all. That is what the 'user-scalable=no' dictates.
Also, your maximum-scale and minimum-scale is set to 1, so even if you remove the 'user-scalable=no', the zooming would disabled by the fact that you there is no scaling range for the user to zoom within.
So to enable zooming for the user you will have to remove the user-scalable=no and set different min and max scale values.
See this link to better understand the settings for the 'viewport' meta tag:
https://developer.apple.com/library/safari/documentation/AppleApplications/Reference/SafariHTMLRef/Articles/MetaTags.html
Secondly, since your 'viewport' meta tag is set on your 'parent' page, these settings apply to anything within that page, i.e the iframe too. Whether the iframe has a different meta 'viewport' tag specifying different settings does not matter since it lives within and abides by the settings of its parent.
This is possible via jQuery. Bind the zooming and panning events to not do anything when zooming and panning outside the divs that you allow zooming and panning. Then for the divs you want to allow zooming and panning, you can use plugins like Panzoom that use "CSS3 transforms and matrix functions" to allow for zooming and panning.
This is not possible as iOS does not allow zooming - you just can scroll through your iFrame.
Is this an external site, that you own? If so, change the CSS code and add it the to viewport like in your question on the top.
Alternatively, you can load the data with PHP. You will surely find a solution for your problem - if not, feel free to ask follow-up questions.
Here is a page I am working on for a class. Don't worry that it's all divs - the exercise allows that as it was to experiment with web fonts.
My problem is that the page renders fine in IE, Firefox, Safari, but on the iPad it doesn't center and the scale is off. If you look at the top left header "Top of the Napkin", it actually breaks into 2 lines on the iPad. There is no left margin yet quite a bit of right margin.
thanks for any help -
The above answer did not work for me on the iPad. Here is what did work.
In the body tag I added the minimum width of what I would want in a browser.
body { min-width:1080px; }
This worked without adding
<meta name="viewport" width=device-width />
but I left it in the header for good measure.
I checked the page on my iPad (latest IOS v5.1) and I can see the text "Top of the Napkin" on one line, though you are right about the entire page not getting center aligned..
For that, I would suggest you to do 2 things;
A. Set the viewport width as below (add this line inside your head element);
<meta name="viewport" width=device-width />
The above line would set your viewport width to device-width (i.e. 768px on the iPad). You can even hard code the value as
<meta name="viewport" width=900 />
Though this is not the best approach.
B. The other thing you can try is giving the following style to your body element
margin:0 auto
This would effectively center align your entire page.
There is some real good information on how to design websites for mobile (iPhone/iPad, etc) on http://bit.ly/rs1npZ
You probably need a viewport meta tag. Check the link for info on what this does and which to choose. http://www.allenpike.com/2010/choosing-a-viewport-for-ipad-sites/
I had the same problem.
for my part, the page was broken because of div elements bigger than their container.
i fixed it by playing with overflow-x property.
You may try putting overflow-x:hidden; on your containers.
I had the same problem. Here is how I fixed it:
<meta name="viewport" content="width=device-width, maximum-scale=.9" />
I developed a web app for the iPhone which has a page with a textarea widget. When I begin editing the contents of this textarea widget Safari zooms in and makes the text really, really big. Now I can't see the document anymore, just a little postage stamp sized piece of it.
Are there any properties I can set which will keep mobile Safari from doint this? I just want the textarea font to stay the same size when I edit its text. Thanks.
You can add:
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no">
to your HTML header.
You would need to set your textarea font-size to 16px and have an initial-scale of 1.0.
But if your app is not really designed for the iPhone, that is, if it’s essentially a normal web page that users should be able to scale, then you should probably just become okay with it. The worst thing to do to your users is show them 6pt text they can’t zoom, you know? Some of them won’t have perfect vision.
See also: Apple's list of all Safari/iOS special meta tags.