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This tutorial is the second in a three-part series on working with the push notification features of iOS 3.0+. It focuses on how to send notifications to Apple's Push Notification Service (APNS) via Urban Airship. This installment builds on the things we set up in the last one, so you will want to go and read through that one first to get up to speed if you haven't already.

Prepare your SSL certificates

The SSL certificate file you downloaded from the iOS Provisioning Portal in part one of this series is in DER format and only contains the certificate - it does not contain your private key. Urban Airship, however, needs both the SSL certificate and private key uploaded in a single PKCS#12 file in order to properly communicate with the Apple Push Notification Service. So, we've got some work to do. Lucky for us, the Keychain Access utility actually does pretty much everything for us with just a few mouse clicks.



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http://mobile.tutsplus.com/tutorials/iphone/ios-sdk_push-notifications...




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