Objective-C @available guard AND'ed with more conditions

Question

Objective-C has an @available expression in XCode 9+ / LLVM 5+ that allows you to guard a block of code to at least a certain OS version so that it won\'t emit unguarded ava

Answer 1

You could also simply use a flag:

BOOL doit = FALSE;

if (@available(iOS 11.0, *)) {
  if (some_condition) {
    doit = TRUE;
  }
}

if (doit) {
  // code to run when on iOS 11+ and some_condition is true
} else {
  // code to run when on older iOS or some_condition is false
}