image-caching

问题 I am using FastImage for caching image and it loads image very fast after caching data as expected. But my server is generating new uri (s3 presigned url) each time for same image. So, FastImage is considering it as new image and tries to download everytime which affects my app performance. My question is, Is there any optimistic way to render images fast as possible without caching it? 回答1: If you have chance to modify the server side application, you can create Authorization headers instead

问题 I've already asked When exactly do things get removed from urlcache's memory and disk? Now I have some more follow up questions: The memory cache is restricted by the iPhone's ram (usually 2Gb). But the disk Persistence is limited by 64Gb or 128Gb. Is that correct? Does it ever make sense to have a persistence more than your memory storage. Can it be useful if you don't want to have a high memory footprint (and don't want app to get terminated from its suspended state) ie allow the cache to

问题 If I do rowBackground = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"bottomCell2.png"] the image is cached for the entire life cycle of the app or reloaded and recached everytime I execute that instruction (in other views or part of the app)? I do that in every tableview of my app. Is it efficient? Thanks in advance! 回答1: As the reference of +imageNamed: : This method looks in the system caches for an image object with the specified name and returns that object if it exists. If a

问题 I'm using imagecache_create_path() and getimagesize() to get the path of a imagecache-generated image and its dimensions. However, if it's the first time we access the page that image doesn't exist yet and imagecache_create_path doesn't generate it either. Here's the code: // we get the image path from a preset (always return the path even if the file doesn't exist) $small_image_path = imagecache_create_path('gallery_image_small', $image["filepath"]); // I get the image dimensions (only if

问题 I added the following code to my asp.net-mvc site.master page with the goal is making sure this image gets loaded upfront and cached (as I use it all over my site): $(document).ready(function () { var x = new Image(); x.src = "/content/images/ajax-loader.gif"; I am assuming this code would force a preload and cache of this ajax loading image but when i run a page that references this image, i still see this for a few seconds. Here is an example of a jqgrid loading div which uses this code for

问题 I have an Angular application which shows people profile images(loaded from a server) and has an option to change it. When the application loads the first time, the image is displayed properly. I call a web service to change the image on a server. The problem is even after changing the image on remote server, the image on the browser is not reflecting the change even on refreshing the page. I tried using the meta tags to disable caching but it's not working for me. The image changes on the

问题 I am working in Android app that load images from Amazon S3. The Image URL randomly changes with token and expiry key. For that reason i can't cache the image Glide. There is any way to set Glide cache key as any static ID(like image id) not url. I attached my code snippet to load image from AWS Glide.with(remoteGalleryAct).load(photoFinalImageURL) .signature(new StringSignature(getImageUrl(photoFinalImageURL)))// remove AWS keys .error(defaultNoImageDrawable) .placeholder

问题 In my Android app i have to read a lot of images, for this reason i have implemented image caching. This is the method through which i decode my images(that were stored in the assets/ folder): private Bitmap getBitmapFromAsset(String strName) { AssetManager assetManager = context.getAssets(); InputStream istr = null; try { istr = assetManager.open(strName); } catch (IOException e) { e.printStackTrace(); } return decodeFileFromAssets(istr); } private Bitmap decodeFileFromAssets(InputStream

问题 I am using this code to display image in to my customCell. This is my code to fetch image from API. It was working fine as per the given link. But the problem started when I added this code to my cellForItemAt indexPath: for image Cache. func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell { // Displaying other elements with text customCell.mainImage.image = nil var image1 = self.imageCache.object(forKey: indexPath.item as

问题 I'm working on a script that waits for content to load in a hidden div before activating a thumbnail that points to it. $('#preload img:first-child') .bind('load',activateThumb) .each(function(){ if(this.complete || this.complete===undefined) $(this).load()}); The each part triggers the load() event for images in the cache. I had to add it in order to make the page work in some browsers that don't fire load() on cached images. There is also a plugin here that does the same thing essentially,