I want to fetch data from JSON and store it automatically to sqlite whatever updated on server automatically updates to database whenever program runs.
Can anyone help me out in it. And if my question is not sufficient to answer please ask anything required.
Thanks in advance.
I would look into the RestKit framework. It takes care of the low-level API calls, object mapping, SQLite persistence, etc. It's well documented and maintained.
You can start here http://www.raywenderlich.com/5492/working-with-json-in-ios-5
After reading this, you can user this Class, https://github.com/AFNetworking/AFNetworking. It's easy and usefull!
Download JSON data with AFNetworking and decode with JSONKit, then you can save to SQLite with this wrapper FMDB.
If your supporting iOS 5+ then JSON is added for you by default and can use it using the method given here and after getting the dictionary of objects , you can follow the normal procedure of adding them to sqlite or use core data as said by #Paras Joshi.
Related
I'm planing to use core data to store my data. I want the user to add some data or update some data that have been added previously by him. I'm going to use a server to save the core data on it, I've read some question here and the answer was to use RESTKit. but I'm not sure if it's the right choice or not, my question is it simple to do what I said before about save the data and retrieve it from server by using a core data? and please if any one have a tutorial for me that will explain lot of things to me like my Idea :/
i did the design and I have now core data with all the entities like user entity and photo entity.
I hope I made my question clear >_< and Thank you for reading my question :$
I like AFNetworking. If you write your web-services to work with JSON, this is a great choice IMO. If you are using XML based web-services and don't want to / can't change to JSON, then TBXML is a great choice for parsing XML.
I am working on a new project where i want to setup the database and access the values whenever i want.So i don't know how to start this.what library should be used for this.Can any one help me...
Thanks,
Anish
Core Data can be a good way to get some abstraction: http://www.raywenderlich.com/934/core-data-tutorial-getting-started
Or, go with SQLite: http://dblog.com.au/iphone-development-tutorials/iphone-sdk-tutorial-reading-data-from-a-sqlite-database/
Highly recommend to use Core Data. You can use SQLIte as the store for your Core Data application. Please refer the apple docs here.
You can use SQLite Manager an Add On of firefox. To See the SQLite Store created by Core Data.
I want to build an app that uses core data, but all the tutorials I found in the net didn't show if I can store a data without using the code it self.
Is there anyway to do it?
For example, i want to make a row of name and put there couple of names.
I've just read the book "Pro Core Data for iOS" from APRESS it covers Core Data very well. I recommend this by heart.
You can try Core Data Editor. But it's not cheap.
You can use SQLite directly without Core Data; there you'd have your SQLs in your own hands. Your can use Core Data and debug SQLs issued by the framework, of course if using SQLite as the store.
Core Data works also with binary and XML format (the latter not available on iPhone): passing following argument to the application:
-com.apple.CoreData.SQLDebug 1
Other than that, you could probably use SQL to access Core Data SQLite store, since it is all SQL, but it is not recommended.
Unfortunately Core Data is all code. However, CoreData is an api that helps you create, save, load data from the database, it uses SQLLite in an easier fashion.
If you need very complex data storage then by all means use SQLLite directly. But, if it's just simple data storage of names, emails, booleans, etc, then i would recommend CoreData.
I'll give you a link that it helped me greatly when i wanted to integrate CoreData for my app.
CoreData Tutorial
Good Luck.
i want to fetch data from web server and save it in my local database through sqllite.How is it possible.
You can fetch data from webserver using JSON and webservice and then parse the JSON Response string.
Then you may create insert statements from the data obtained and execute it to insert in your database using executeNonQuery method of SQLite.
Best option is to do all this on appDidFinishLaunching so that there would be initial delay but then whole app after that would not face any performance issues i.e. No delays
Hope this helps you.
Well,
it depends on what kind of data you want to fetch. If you want to fetch XML from the webserver, you will get a nice list of xml parsers on this site: http://www.raywenderlich.com/553/how-to-chose-the-best-xml-parser-for-your-iphone-project
Another nice option for fetching any kind of data from the webserver is curl. You can find static libraries on this page: http://code.google.com/p/ios-static-libraries/
Well, there's always the option to use the iOS native libraries, which are documented (with examples) in the iOS SDK.
I would not recommend using "raw" SQLite these days unless you have an exceptional reason to do so. Core Data is the way forward.
I'm not really sure what your question is; it's so broad. But, in general, you'd create an NSURLConnection, download the data, parse the data and store it in your database. Each stage is pretty well documented and there are lots of questions here on each stage.
If you use Core Data there are also some open source projects, such as RestKit, that might give you a good starting point.
I am a newbie in Xcode. I am developing an iPhone app where I need to send and receive data from a web service. And I need to store them temporarily in my app. I don't want to use SQLite. So I wondering if I should use core data for this purpose. I read some articles but I still don't have a clear picture of How to do it, because I have used core data only with SQLite. I want to do the following things :
How to receive table data from a web service?
Have to perform certain calculations on those fields.
How to send the data back in xml format to the server?
How do I convert the xml data into int, date or any other data type? And How do I store it in managed data objects?
You want to use an XML parser to turn the XML into other objects; I tend to recommend TouchXML for that.
You can use Core Data and an in memory store if you are not going to save the data as it will then create and manage all of the data objects for you and generally give you less code to write. However that depends on your app if it is worth it or not. Personally i use Core Data in every app that works with data.
As for sending data, you can use the same library that you used to consume the XML to produce XML. Most of them now days are bi-directional.
For a specific example of fetching XML from server and then storing on the device using core data take a look at Björn Sållarp's blog post on Core Data and UITableView. A drill-down application. Note this example makes use of NSXMLParser and not TouchXML.
I have also found [coredatalibrary xcode template][2] to be quite useful in getting started with a new Core Data project.
Also if you are adding custom logic to your managed objects take a look at rentzch's [mogenerator][3] which generates 2 classes _MyEntity and its subclass MyEntity.