ios - Cache Images and load on scroll in UICollectionView with SDWebImageDownloader Xamarin -


i have uicollectionview cells images downloaded url along headers. below :-

internal void updatecell(profilevalues mdata)         {               var murl = "someurl";     var manager = sdwebimagemanager.sharedmanager;    manager.imagecache.maxcacheage = 86400;             sdwebimagedownloader mdownloader = manager.imagedownloader;              var authtoken = "sometoken"";               mdownloader.sethttpheadervalue(authtoken, "authorization");             mdownloader.sethttpheadervalue("application/json; odata=verbose", "accept");             mdownloader.sethttpheadervalue("f", "x-forms_based_auth_accepted");               try             {                 mdownloader.downloadimage(                  url: new nsurl(murl),      options: sdwebimagedownloaderoptions.progressivedownload,                 progressblock: (receivedsize, expectedsize) =>                 {                     // track progress...                 },                 completedblock: (image, data, error, finished) =>                 {                      if (image != null && finished)                     {                         invokeonmainthread(() =>                         {                              this.imgprofilepic.image = image;                         });                      }                     if (error != null)                     {                         invokeonmainthread(() =>                         {                             this.imgprofilepic.image = errorimage;                             this.imgprofilepic.backgroundcolor = uicolor.fromrgb(52, 31, 71);                             //this.imgprofilepic.layer.cornerradius = this.imgprofilepic.frame.size.width / 2;                             this.imgprofilepic.clipstobounds = true;                             this.imgprofilepic.layer.borderwidth = 3.0f;                             this.imgprofilepic.layer.bordercolor = uicolor.white.cgcolor;                         });                     }                 }                 );             }             catch (exception ex)             {             }         }

but on every scroll cells reloaded , images downloaded everytime. how can cache images , load images cache on scroll? appreciated.

use ffimageloading package & use class cachedimage place of image

var cachedimage = new cachedimage() {     horizontaloptions = layoutoptions.center,     verticaloptions = layoutoptions.center,     widthrequest = 300,     heightrequest = 300,     cacheduration = timespan.fromdays(30),     downsampletoviewsize = true,     retrycount = 0,     retrydelay = 250,     transparencyenabled = false,     source = "http://loremflickr.com/600/600/nature?filename=simple.jpg",     cachekeyfactory = new customcachekeyfactory(), };

Comments

Post a Comment

Popular posts from this blog

asynchronous - C# WinSCP .NET assembly: How to upload multiple files asynchronously -

i using winscp .net assembly uploading files. want upload multiple files asynchronous way. have created method works single upload. public class uploadingdata { private sessionoptions _sessionoptions; private session _session; //connection etc private void onconnected() { foreach (var fileinfo in localfileslist) { var task = task.factory.startnew(() => uploadfilesasync(fileinfo)); } } private async task uploadfilesasync(string file) { string remotefilepath = _session.translatelocalpathtoremote(file, @"/", "/test_data_upload"); var uploading = _session.putfiles(file, remotefilepath, false); //when done await task.run(() => thread.sleep(1000)); } } please suggest me correct way. thanks you can use backgroundworker class this: string[] images = new string[50]; foreach (var path in images) { backgroundworker
Read more

aws api gateway - SerializationException in posting new Records via Dynamodb Proxy Service in API -

i getting "__type": "com.amazon.coral.service#serializationexception" as reply in postman & in test console in api gateway trying post record directly dynamodb using api proxy services.. referring aws article - https://aws.amazon.com/blogs/compute/using-amazon-api-gateway-as-a-proxy-for-dynamodb/ here's mapping { "tablename": "tablenamegoeshere", "item": { "id" : "$context.requestid" "eventname" : "$input.path('$.eventname')", "timestamp" : $input.path('$.timestamp'), "answers": "$util.parsejson($input.path('$.answers'))" } } update: did asked ... , worked if try add array of json objects gives me above same error - here's trying now. please - couldnt find on google well #set($inputroot = $input.path('$')) { "tablename": "answer", "item": {
Read more

asp.net - Problems sending emails from forum -

i have been redesigning site has message board, has been written guy looked after site. it has few problems , written in .asp , uses .mdb files database. you can see whole thing here . feel free post if helps, test thing have set using original files , new database. the basic problem when posts message, supposed email sent them, have posted it. when replies, originator supposed message, replier has been posted. i’d have thought @ point in process there should script/file in postmessage.asp? the postmessage.asp page below. <% option explicit %> <!-- #include virtual="common/adovbs.inc" --> <html> <head> <meta http-equiv="content-type" content="text/html; charset=windows-1252"> <meta name="generator" content="microsoft frontpage 4.0"> <meta name="progid" content="frontpage.editor.document"> <title>new page 2</title> <base target="_self"
Read more