loading | 易学教程

Swift - Lazy loading a property that can be made nil later

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I am looking for a way to lazy load my variable, but I want to be able to make it nil later and then recreate it on the get. For example in the instance that there is a memory warning i want to clear anything that isn't used and then recreate it when needed again later. Here is how I would do it in Objective-C and my current interpretation in swift. I am not sure that it preserves the variable for keeping current navigation. Obj-C Implementation @property (strong, nonatomic, readwrite) UINavigationController *navController; ... - (UINavigationController *)navController { if (!_navController) {

How to show loading gif image while content called via javascript is loading?

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On my page I have javascript that loads new content in <div id="content"></div> from other page located at: inc/content.php . I would like to know how can I show animated gif image loading.gif in <div id="content"></div> while new content gets loaded into it? and once loaded hide gif and show new conntent? Thank You ))) Here is my code: <html> <head> <script type="text/javascript" src="js/jquery-1.6.4.js"></script> <script type="text/javascript"> function viewNext() { $("#content").load("inc/content.php"); } </script> </head> <body> <button id="nextfLuky" onClick="viewNext();return false;"

How to add custom global javascript to mediawiki

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问题 How can I add a custom javascript file (let's say custom.js ) to a mediawiki installation? For instance, if I put custom.js under the folder resources/lib/ , how do I get that to be loaded on every page? I am not trying to do this as part of an extension, and I would prefer to keep my changes in LocalSettings.php . 回答1: As garryp has already suggested, you can put the JavaScript code into MediaWiki:Common.js. Note that this is not a file, but simply a page you can edit (as an administrator)

How to display a “Loading…” text while retrieving items for a ListView

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问题 There are some others applications doing this, like Twitter, Facebook, or even native applications such as Android Market. When you want to display a list of items retrieved from the internet, this looks like a standard way for displaying the user some notification about action in progress. This is a white background screen with an animated spinning wheel and a "Loading..." text. Does somebody know how to do this? I've been able to do something similar with this code, but I don't like it too

Ehlib大数据载入时loading

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代码很简单：代码很简单： 1 2 3 4 DBGrideh . StartLoadingStatus( ' Loading ... ' ); Sleep( 500 ); DBGrideh . FinishLoadingStatus; 做下变动： 1 2 3 DBGrideh . StartLoadingStatus( ' Loading ... ' , 1000 ); //1000表示显示的速度 Sleep( 500 ); DBGrideh . FinishLoadingStatus( 1000 ); //1000表示显示的速度,此处的单位不是毫秒上一段代码中发现的数值1000单位不是毫秒，原因见代码 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Steps := RenderDuration; //上一段代码中的数值1000 i := 1 ;　　　　 //起始数值1; Step := 1 ;　　　　 //步长1; while i < Steps do begin DrawAlphaBlend(i, Steps); RenDur := GetTickCount - t; if RenDur > 0 then StepSize := Round(RenDur / Step) else StepSize := 1 ; if StepSize = 0

Jquery: fadeIn images after DOM has loaded. Works sometimes..?

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//fade in images after the image has loaded.. $(document).ready(function(){ $(".image_ad").hide().bind("load", function () { $(this).fadeIn(400); }); }); If anyone has any input this would be great. I wrote this to avoid having to watch images load on the page, I rather the page loaded then when each image is ready they fade in nicely. The problem is that sometimes a couple of images will never load, hitting refresh will correct this but I would rather get it perfect and ask if anyone has any idea why. I have a feeling that sometimes the dom hasn't fully loaded by the time the script has run,

loading animated png [closed]

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问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 7 years ago . I'm looking for an animated Loading icon that is also transparent; however (I know I'm lazy) I dont want to make my own. Please forgive me if this is not the correct forum for this post, I've just had so much luck here in the past. does anyone know where I can find one of these....it needs to be very small (icon

Wait with image replace until image is loaded

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I have a working script (thanks stackexchange!) for exchanging an image on the fly. I use it as a gallery script. It looks like this: $(".source a").click(function(e){ e.preventDefault(); var $a = $(this); $("#targetcontainer img").hide("puff", function(){ $(this).attr("src", $a.attr("href")).show("fold"); }); }); The problem regarding this script is that the old image flickers after the JQ show command. The new source Image shows up a second or so later which makes a weird effect. how can I prevent this from happening? You could preload the image before attempting to display it... $(".source

How to load packages in Octave permanently?

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问题 I am using Octave on Window vista. I am using 4 package in my code. But every time I restart octave, I have to load manually from command line, 'pkg load ...' Is there a way to load them permanently so that whenever Octave is started it finds them in its path. 回答1: When Octave starts, it runs ~/.octaverc . If you want Octave to automatically load a package, simply add a pkg load pkg-name command to it. If the files does not exist, create it. If you do this, remember that other people may not

How to display loading dialog when someone clicks a specific link?

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I do have an URL which opens a webpage which is very slow to load and I have no control over it. I do want to display a loading dialog when someone clicks this URL or to block page with an overlay div when this happens. Note: this is not the same question as the ajax related ones, this for normal URL clicks form the user, not all of them only specific ones. <A href="http://veryslowload.com" onClick="...">slow load...</a> I suppose that what I am looking for is what to put on the onClick. You can do this : $(function(){ $('a').click(function(){ $('<div class=loadingDiv>loading...</div>')