below / weaklink

A sample for a weak linking question

WeakLink

These projects demonstrate my question if UIUserNotifications can be weak linked directly, or if I have to use NSClassFromString, as I currently do as a workaround

In the Documentation Apple says that:

For iOS frameworks that support the NS_CLASS_AVAILABLE macro, conditionalize your code for weakly linked classes as demonstrated in the following example:

if ([UIPrintInteractionController class]) { // Create an instance of the class and use it. } else { // Alternate code path to follow when the // class is not available. }

Conditions for this are:

• The base SDK for your Xcode project must be iOS 4.2 or newer.
• The deployment target for your project must be iOS 3.1 or newer.
• The compiler for your project must be the LLVM-GCC 4.2 compiler or newer, or the LLVM compiler (Clang) 1.5 or newer.
• You must ensure that any frameworks not available in your project’s deployment target are weakly linked, rather than required.

However, for UIUserNotificationSettings I will get: Undefined symbols for architecture armv7: "_OBJC_CLASS_$_UIUserNotificationSettings" if linked for iOS 7.

Is this a bug?