background interview questions
Top background frequently asked interview questions
i have an uiview and i set a background image in this way:
self.view.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"sfond-appz.png"]];
My problem is that back-image is not centered inside the view, but it's replayed some times to fill all the view. Is there a way to center image inside uiview and scretch to have screen size?
Note: I can't use UIImageView for background cause i have a scrollview.
Source: (StackOverflow)
I'm trying to set the background color of a View (in this case a Button).
I use this code:
// set the background to green
v.setBackgroundColor(0x0000FF00 );
v.invalidate();
It causes the Button to disappear from the screen. What am I doing wrong, and what is the correct way to change the background color on any View?
Thanks.
Source: (StackOverflow)
<td class="style1" align='center' height='35'>
<div style='overflow: hidden; width: 230px;'>
<a class='link' herf='' onclick='topic(<?=$key;?>)'>
<span id='name<?=$key;?>'><?=$name;?></span> </a>
</div>
</td>
This is my CSS script
.style1 {
background-image:url('http://localhost/msite/images/12.PNG');
background-repeat:no-repeat;
background-position:left center;
}
I want to stretch the background-image all over the <td> cell
Source: (StackOverflow)
I want that my background image stretch and scale depending on the browser viewport size.
I've seen some questions on Stack Overflow that do the job, like Stretch and scale CSS background for example. It works well, but I want to place the image using background, not with an img tag.
In that one an img tag is placed, and then with CSS we tribute to the img tag.
width:100%; height:100%;
It works, but that question is a bit old, and states that in CSS 3 resizing a background image will work pretty well. I've tried this example the first one, but it didn't work out for me.
Is there a good method to do it with the background-image declaration?
Source: (StackOverflow)
UPDATE: Since this post has gotten a lot of attention over the years, I've listed the top solutions per platform at the bottom of this post.
Original post:
I want my node.js server to run in the background, i.e.: when I close my terminal I want my server to keep running. I've googled this and came up with this tutorial, however it doesn't work as intended. So instead of using that daemon script, I thought I just used the output redirection (the 2>&1 >> file part), but this too does not exit - I get a blank line in my terminal, like it's waiting for output/errors.
I've also tried to put the process in the background, but as soon as I close my terminal the process is killed as well.
So how can I leave it running when I shut down my local computer?
Top solutions:
Source: (StackOverflow)
Does anyone know the vendor prefix for gradients within IE9 or are we still supposed to still be using their proprietry filters?
What I've got for the other browsers is:
background-image: -moz-linear-gradient(top, #444444, #999999); /* FF3.6 */
background-image: -webkit-gradient(linear,left top,left bottom,color-stop(0, #444444),color-stop(1, #999999)); /* Saf4+, Chrome */
filter: progid:DXImageTransform.Microsoft.gradient(startColorStr='#444444', EndColorStr='#999999'); /* IE6,IE7 */
-ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorStr='#444444', EndColorStr='#999999')"; /* IE8 */
As a bonus does anyone know Opera's vendor prefix as well?
Source: (StackOverflow)
I know that Internet Explorer has some proprietary extensions so that you can do things like create divs with a gradient background. I can't remember the element name or it's usage. Does anyone have some examples or links?
Source: (StackOverflow)
Is there any way to set a background view on a UITableViewController?
I try with the code I am using on a UIViewController, but the view comes over all the contents of the table view. If I add the background view in the cellForRowAtIndexPath-method, it is not showing at all. Has anyone done this before or have an idea on how it can be done?
Here is the code I am using:
UIImage *image = [UIImage imageNamed: @"background.jpg"];
UIImageView *backImage = [[UIImageView alloc] initWithImage: image];
[self.view addSubview: backImage];
[self.view sendSubviewToBack: backImage];
Source: (StackOverflow)
I work on a somewhat large web application, and the backend is mostly in PHP. There are several places in the code where I need to complete some task, but I don't want to make the user wait for the result. For example, when creating a new account, I need to send them a welcome email. But when they hit the 'Finish Registration' button, I don't want to make them wait until the email is actually sent, I just want to start the process, and return a message to the user right away.
Up until now, in some places I've been using what feels like a hack with exec(). Basically doing things like:
exec("doTask.php $arg1 $arg2 $arg3 >/dev/null 2>&1 &");
Which appears to work, but I'm wondering if there's a better way. I'm considering writing a system which queues up tasks in a MySQL table, and a separate long-running PHP script that queries that table once a second, and executes any new tasks it finds. This would also have the advantage of letting me split the tasks among several worker machines in the future if I needed to.
Am I re-inventing the wheel? Is there a better solution than the exec() hack or the MySQL queue?
Source: (StackOverflow)
Does anyone know how to set a scheduled task to run in background using Windows Task Scheduler?
There doesn't seem to be any option to do this.
Source: (StackOverflow)
I see many applications that use a full-screen image as background.
This is an example:
I want to use this in a project, the best way I've found so far to do this is to use an image with a large size, put it in a ImageView and use android: adjustViewBounds="true" to adjust the margins
The problem is that if a screen with a very high resolution, the image falls short.
Another option I thought of is to use the image in a FrameLayout, with match_parent in width and height as background... this stretches the image, but I think the result is not very good.
I can ask how would you do it?
Thanks in advance
Regrads
Source: (StackOverflow)
How do I change the black background of the Aptana IDE (or the entire theme) to a different one, like blue?
Source: (StackOverflow)
I want to use a video as a background instead of an image that automatically stretches to the whole screen (background).
I would also like to rotate videos and images.. so that there is a random video/image displayed in any order.
It would also be nice to know how to delay video playback, so that the video only plays once 30 seconds after the site loaded.
thx!
Source: (StackOverflow)
I have a hidden contact form which is deployed clicking on a button. Its fields are set as CSS background images, and they always appears a bit later than the div that have been toggled.
I was using this snippet in the <head> section, but with no luck (after I cleared the cache) :
<script>
$(document).ready(function() {
pic = new Image();
pic2 = new Image();
pic3 = new Image();
pic.src="<?php bloginfo('template_directory'); ?>/images/inputs/input1.png";
pic2.src="<?php bloginfo('template_directory'); ?>/images/inputs/input2.png";
pic3.src="<?php bloginfo('template_directory'); ?>/images/inputs/input3.png";
});
</script>
I'm using jQuery as my library, and it would be cool if I could use it as well for arranging this issue.
Thanks for your thoughs.
Source: (StackOverflow)
For quite a while I'd been looking into a way in my iPhone app to poll every X minutes to check the data counters. After much reading of the Background Execution documentation and a few trial apps I'd dismissed this as impossible without abusing the background APIs.
Last week I found this application which does exactly that. http://itunes.apple.com/us/app/dataman-real-time-data-usage/id393282873?mt=8
It runs in the background and keeps track of the count of Cellular/WiFi data you've used. I suspect that the developer is registering his app as tracking location changes but the location services icon isn't visible while the app is running, which I thought was a requirement.
Does anyone have any clues as to how this can be accomplished?
Source: (StackOverflow)