UITableView Scrolling is Choppy When Displaying Images From Web

im guessing you are pulling images for each cell in cellForRowAtIndexPath? maybe try downloading all the images beforehand and saving them to an array, and using that array in cell for row instead of downloading them then.

Aaron Daub makes a good point. You should get them asynchronously. This video from the ribbit app should explain it enough so you can apply it to your situation. It also conveniently deals with getting images.

Yup I was pulling the image for each cell in cellForRowAtIndexPath. Storing them in an array in viewDidLoad fixed the issue. Thanks Stone!

This was really helpful.Can this be used in production? Also I have a question concerning NSURLSessionDownloadTask, where you said it downloads to disk..is that data stored permanently there or only when using the the app?

Thanks that was really a nice lesson. Is it possible to get a lesson on how to create a spinner while waiting waiting for response instead of having a defaults value...

MBProgessHud looks good. What I wanted is to know where can I be waiting for the response. same like ajax where you can have a spinner while waiting for data and on arrival you stop the spinner and display the data.

I would like to make a music player with external songs which should be loaded from json. My intention is use TableView to display the list of songs and when user clicks a row, then the song at that row should play. I have managed to download the songs using NSURLSessionDownloadTask , which i am not sure if its the right way to do it,.. now issue is to proceed from there and play the songs. Below is my sample and the url contains the songs i would like to fill in my table.

{ status: "OK", tracks: [ { id: 1, name: "Tail Toddle", fileName: "tailtoddle_lo", url: "http://www.tonycuffe.com/mp3/tailtoddle_lo.mp3" }, { id: 2, name: "Sae Will We Yet", fileName: "saewill", url: "http://www.tonycuffe.com/mp3/saewill.mp3" }, ] }

Below is a snippet of how I am download the mp3 songs from the url

//Download the song from TrackURL

if([track.trackURL isKindOfClass:[NSString class]])
{

    NSURLSession *session = [NSURLSession sharedSession];

    NSURLSessionDownloadTask *task = [session downloadTaskWithURL:[track getTrackURL] completionHandler:^(NSURL *location, NSURLResponse *response, NSError *error) {


        dispatch_async(dispatch_get_main_queue(), ^{


        });


    }];


    [task resume];
}

This is the furthest I have reached and am stuck on how to link the songs to the cell. Am using AVAudioPlayer of AVFoundation framework. I will really appreciate any help as am still newbie to ios and not much knowledge.

Hi guys Would you advice on using the NSURLSession class if your json is only composed of data of type string only.. I mean no heavy files like images,video etc?

Quick question, in cellForRowAtIndexPath you are always creating a download task.... when cells are reused (if you scroll a few cells down) will the app always download the image over and over again? If so surely you should be storing the downloaded image in the sandbox documents folder and then checking if this exists before starting to download the image over and over again.

Thanks for the very fast answer!