how to print barcode in vb.net 2008 Preparing your application to use push notifications in Objective-C

Maker QR Code ISO/IEC18004 in Objective-C Preparing your application to use push notifications

Leave it to Apple to make the preparation more complex than the coding. You ll find that you spend more time creating and uploading the signing certificates than writing the code to receive push notifications. You begin by setting up the signing certificates.

You must have a valid Apple developer account to test push notifications. We ll show you how to generate two items that are required. The first item you ll generate is a special provisioning profile. This profile will be used to sign the application when

deploying it to your device. The second is a client SSL certificate. The push provider will use this to establish a connection with Apple s push notification servers. Start by logging into your Apple developer account. Then, open the program portal, and navigate to the App IDs tab. If you haven t already done so, you ll need to add your application bundle identifier to this list. The format for this should be reverse domain for example, com.rightsprite.pushtest. Make sure you don t use any wildcards, because the system must be able to uniquely identify your application. After you ve added your application, you must configure it to receive push notifications. You have the option to configure the app for development as well as production. It s always good practice to use the development certificate when testing and switch to the production certificate when you re ready to submit to the app store. Figure 16.4 shows what this section should look like. Click the Configure button. The following screen gives you the option to configure either the development or the production certificate. For this example, you ll configure the debug certificate, but the steps for both are exactly the same. Figure 16.5 shows what this process looks like.

As you may have guessed, this process is similar to creating any other provisioning profile. After completing this step, you need to download this certificate and install it in your keychain by double-clicking it.

Now that you ve created the signing certificate, you need to create the provisioning profile to allow the application to be installed. Again, you don t want to use your generic developer certificate. You must generate a new certificate that is specific to your app s full bundle id. Go to the Provisioning tab. Because you created a push certificate for debug, you must also create a debug provisioning profile. Had you created a production certificate, you would need to create an app store or ad hoc certificate. Click the New Profile button on the Development tab. As you may have seen before, you need to set up quite a few options. The first is the profile name. This can be anything you want, but your best bet is to be descriptive. Name the profile something of the format (application name) Debug . Next, you ll select the certificate that the profile will use. If you re a single user, you should see only your certificate in the list. But if you re on a team, you should see a certificate for every one of your team members. Check the boxes of the teammates who will be testing the push notifications. Note that when you re creating a build for the app store, you ll select your distribution certificate. Following the certificate, you need to select the app id that the profile will be used for. This corresponds to the app id created in section 16.3.1. Finally, you must select the devices the provisioning profile will work on. Figure 16.6 shows an example of what this form looks like when it s complete. After you create this profile, you need to download and install it. That s about it for the certificate creation. We ll now discuss how to implement the methods in your client application to enable and receive push notifications.