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what is appDelegate?

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The  AppDelegate  is sort of like the entry point for your application.  It implements  UIApplicationDelegate  and contains methods that are called when your application launches, when is going to the background (i.e. when you hit the home key), when it’s opened back up, and more.  The  AppDelegate  object is stored as a property on the  UIApplication  class and is accessible from anywhere in your objective-C classes.  The header and implementation file for your  AppDelegate  is generated when you create your project and you don’t have to make any modifications for it to work.  However, that doesn’t mean we can’t make changes and make use of the  AppDelegate .  We’re going to keep this simple and just add a new NSString  property to the delegate. AppDelegate is handling special UIApplication states. This lets you do initialization/cleanup of your app at the right time.So basically the ...
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Difference Between REST and SOAP Protocols in iPhone

REST :--->   Rest stands for Representational State Transfer. It defines a set of architectural principles by which you can design Web Services that focus on a system's resources, including how resource states are addressed and transferred over HTTP by a wide range of clients written in various languages.  REST has advantages when:---> - You have a set of resources that you want to manipulate. - You want to support navigation among resources. - You need scalability. RESTful web services are tyically stateless and therefore easily scalable. - You want to improve performance by caching web service request results at some point between the service and the consumer. SOAP :--->  Soap stands for Simple Object Access Protocol. It is a simple XML-based protocol to let applications exchange information over HTTP.                        Or SOAP is a protocol for accessing a Web Service. SOAP is for ...
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Steps to follow to submitting iPhone/iPad Apps To The Apple App Store

Step 1: Certificate is an essential element to submit or test an application on iPhone. It comes with code sign(Signatures) which would verified when an application is submitted on apple store or when tested on iPhone. One can bypass these if an application is installed on jail-break iPhone or  when submitted on Cydia but this is not possible when one wants submit it to AppStore. One has to through 2 step procedure to create a certificate from developer portal. I copied those two from “iPhone developer portal”  Generating Certificate Signing Request  Submitting a Certificate Signing Request for Approval Generating a Certificate Signing Request :   Open the Utilities folder and launch Key chain Access from the Applications folder.  Set the value of Online Certificate Status Protocol (OCSP) and Certificate Revocation List (CRL) to “off” in the Preferences Menu.  Select Key chain Access -> Certificate Assistant -> Request a Certif...
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