Is it safe to conditionally code for iOS 6 and 7 by calling +class?

Question

For example there is a new class in iOS 7 that does not exist in iOS 6. I want to use this new class. My app must stay compatible with iOS 6. So I read in some places that you can now do this:

if ([NSURLSessionConfiguration class]) {
    // only in iOS 7        
} else {
    // do it iOS6 way
}

Is this safe to do in any iOS 6 version or should we still use NSClassFromString?

possible duplicate of [Weak Linking - check if a class exists and use that class](http://stackoverflow.com/questions/3057325/weak-linking-check-if-a-class-exists-and-use-that-class) — ldiqual, Sep 21 '13 at 21:22
Duplicate but I like this question more. It's more succinct and there's actually code in the question. — Joshua Gross, Sep 21 '13 at 21:25

score 9 · Accepted Answer · edited Jun 20 '20 at 09:12

9

YES, this is safe.

This is the correct and recommended way of checking to see if certain classes are available to be used.

edited Jun 20 '20 at 09:12

Community

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answered Sep 21 '13 at 21:20

Dave DeLong

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Is it safe to conditionally code for iOS 6 and 7 by calling +class?

1 Answers1

YES, this is safe.