sharedProfileImageRequestOperationQueue is declared in interface extension, but only implemented on Mac OS X. This causes an incomplete implementation warning. Added same #if around interface as surrounds impelmentation.
This only affects sample code.
`informativeTextWithFormat` interprets its string as a format. `[error localizedDescription]` could contain string formatting specifiers.
Fixes to use @"%@", [error localizedDescription] instead.
Spotted via compiler warning.
Renaming iOS example project
Adding AFNetworking to Mac project using preprocessor macros to resolve UIKit dependencies, and setting compiler flags accordingly.
threads could pass the nil check. One would acquire the lock and create the
sharedClient. The second thread would eventually get the lock and also acquire
a sharedClient.