loading

问题 So I am loading multiple images onto multiple canvases basically (one image per canvas/ctx - its a slideshow). I want to make sure that each image is loaded before it attempts to draw the image onto the canvas. Here is the code... In Example 1 i'm using 3 onload events (one for each image) In Example 2 i'm using one onload event, but it is the last image that gets called in the for loop Question: Can i use Example 2 and be confident to assume that if the last image is loaded, then the images

问题 I checked other questions, but they all had information how to make a callback when one specific image has loaded: var img = new Image(); img.src = "images/img.png"; if (!img.complete) { img.onload = function() { // code to be executed when the image loads } } Or a simple check to see if all images are loaded with an 'if' statement. Also, $(window).load (or onLoad or whatever) doesn't work. In my case I'm loading two images: var img1 = new Image(); var img2 = new Image(); img1.src = 'images

问题 I used "Ionic Loading Controller" to show a spinner until the data is retrieved then it calls "dismiss()" to dismissed it. it works fine, but sometimes when the app already have the data, the "dismiss()" is called before the "create()" and "present()" is done which will keep the spinner without dismissing... I tried to call the data inside "loadingController.present().then()", but that caused the data to be slower... is this a bug? how to solve the this issue? Example of my code: customer:

问题 I'm trying to toggle (hide/show) a loading gif on every new route, so my logic would be: routeChangeStart = show loading gif routeChangeSuccess = hide loading gif This is my code: //ANGULAR app.run(function($rootScope) { $rootScope.layout = {}; $rootScope.layout.loading = false; $rootScope.$on('$routeChangeStart', function() { //show loading gif $rootScope.layout.loading = true; }); $rootScope.$on('$routeChangeSuccess', function() { //hide loading gif $rootScope.layout.loading = false; });

问题 i want a loading template to appear before the site has all data to be rendered. And after the serverside Method gives me the Data(from an API [async]) via Meteor.call i want to load the correct layout. I tried many ways found on Google which describe similar but not exatcly the same problem. Including the way to define a function with ready handle, also doesn´t work. I can´t get it running. i don´t want to use Collections because this is user specific Data.( i think this is not efficient to

问题 When loading a widget if it cannot find a resource or something it says Problem Loading Widget. That's all! Amazing! This message remains on the home screen and does not even say which widget it had trouble loading. I figured it out by trial and error but I would like to know if there are any places to find the error message when this occurs. Where will Android say what problem it had loading the widget or even which widget it failed to load? 回答1: As said in comments, check logcat. What you

问题 Having real trouble using my localhost to test sites. It runs extremely slowly! Sometimes it takes up to a minute to load a page. I'm using Firefox and the sites I'm testing run fine on other developers in my office's local machines / on the production server. I've gone through the normal things :- Disabled IPv6 Not running in debug mode Put the site in the highest app pool (High Isolated) on IIS 6. Taking of firewalls etc. The problem only seems to occur when hitting pages which contain some

问题 I'm trying to dynamically load modules I've created. Right now this works properly: import structures.index But if I try the same thing by importing it dynamically, it fails. struct = __import__("structures.index") Error supplied is: Error ('No module named structures.index',) Any ideas why? Edit: When using full scope (it sort of works?): struct = __import__("neoform.structures.index") This doesn't throw any errors, however, it isn't loading the index module, it's loading the "neoform"

问题 I know there are thousands of examples on the internet, but I want for the script I already have to display a loading gif image while the data is retrievedd. My java knowledge are poor, therefore I'm asking how to change the following: <script type="text/javascript"> $(document).ready(function(){ function getData(p){ var page=p; $.ajax({ url: "loadData.php?id=<? echo $id; ?>", type: "POST", cache: false, data: "&page="+ page, success : function(html){ $(".content").html(html); } }); } getData

问题 i'm trying to create a webapp with swift in xcode, this is my current code: IBOutlet var webView: UIWebView! var theBool: Bool = false var myTimer = NSTimer() @IBOutlet var progressBar: UIProgressView! override func viewDidLoad() { super.viewDidLoad() let url = NSURL(string: "http://stackoverflow.com") let request = NSURLRequest(URL: url) webView.loadRequest(request) } I've a question, How i can determinate the finish loading of the page in webView? Do you know a documentation that contains