CODEWITHSUNDEEP
iphoneobjective-c
Ranjan Sahu
Ranjan Sahu

Reputation: 300

How to manage data from web service to make application fast and smooth

I am working in an application in which I Am getting data from web service in json format for each and every page and also sending data to remote data base.In this process my application is getting slow .Until the data is fetched from web service the next view is not loaded.It is consuming a lot of time, is there any way to fetch data and show view simultaneously.I heard about thread programing but I Am not familiar with it .Please suggest me which technique I should adopt to make my application faster.any help will be appreciated.

Upvotes: 1

Views: 719

Answers (3)

Mundi
Mundi

Reputation: 80265

For your purposes, it would be easiest to just use the standard NSURLConnection. It is asynchronous out of the box. In the completion handler you can e.g. update your UI, or notify it to update itself.

NSURLRequest *request = [NSURLRequest requestWithURL:
   [NSURL URLWithString:urlString]];
[NSURLConnection sendAsynchronousRequest:request
   queue:self.queue
   completionHandler:^(NSURLResponse *response, NSData *data, NSError *error){
       // do something with data or handle error
   }];

Upvotes: 0

Kartik
Kartik

Reputation: 779

Fo this you can do like do your all downloading and uploading of data in background process so user does not need to wait until the data completed them task.

for background process you can easily use with

[self performSelectorInBackground:@selector(runProcessInBackground:) withObject:nil];

or you also can refer this https://stackoverflow.com/questions/9949248/iphone-sdk-running-a-repeating-process-in-a-background-thread.

and also u can use pagination in the appliaction for displaying data like in first call u will just receive first 100 records from the web service so that will take small time period and after 100 fetched then load another when page come in end so with this also u can increase your app. speed.

hope this will help you.

Upvotes: 0

Echilon
Echilon

Reputation: 10244

You can use Grand Central Dispatch or an NSInvocationOperation to do the loading in a background thread:

dispatch_queue_t q = dispatch_get_global_queue(0, 0);
dispatch_queue_t main = dispatch_get_main_queue();
dispatch_async(q, ^{
    PagedSearchResult *result = // something which takes a while to complete
    dispatch_sync(main, ^{
        // update the UI
    });
});

Take a look at Ray Wenderlich's Grand Central Dispatch tutorial.

Upvotes: 3

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