Question

Apparently, my use of Twitter oAuth (token request) doesn’t work in iOS 5… how can I keep this code for anything below iOS 5 and use the new Twitter Framework for iOS 5+?

Is it possible to detect iOS versions?

Thanks!

Answer 1

You (almost) never want to query iOS (or even framework) versions. That (usually) means you’re solving the wrong problem.

In this case, you really want to know “can I use Twitter.framework?”

Thanks to the magic of weak linking, you can try something like:

if ([TWTweetComposeViewController canSendTweet]) {
    // Do something
}
else {
    // Use your original code
}

You can also check for lower level framework components, e.g.:

if ([TWRequest class]) {
    // Do something
}
else {
    // Use your original code
}

(Obviously you will need to link against Twitter.framework and include the requisite headers.)