Use of undeclared type AutoreleasingUnsafePointer Xcode 6 beta 6

问题

The following code gives a compiler error "Use of undeclared type AutoreleasingUnsafePointer"

    var myString: AutoreleasingUnsafePointer<NSString?>

Have I missed a compiler setup step?

Thanks

回答1:

As stated in the documentation revision history

Updated the Pointers section to reflect that UnsafePointer has been replaced with UnsafeMutablePointer, ConstUnsafePointer has been replaced with UnsafePointer, and AutoreleasingUnsafePointer has been replaced with AutoreleasingUnsafeMutablePointer.

So you have to use AutoreleasingUnsafeMutablePointer

回答2:

I was having the same problem, but, using NSError. In new version of Xcode (6.4) and Swift (previous version 2) it's necessary to use:

var err: AutoreleasingUnsafeMutablePointer<NSError?> = nil

来源：https://stackoverflow.com/questions/25699567/use-of-undeclared-type-autoreleasingunsafepointer-xcode-6-beta-6