how to toggle a BOOL value in objective-c

Question

I have the following:

for(CTVMenuItem *mi in selected){
  // if showFlag is YES -> NO; if NO -> YES
  mi.showFlag=@(!mi.showFlag);
}

but it is not working. Because of common items, I am having a hard time googling it. How would I make a YES become no and a NO become YES?

Answer 1

If showFlag is of type BOOL then it's simply:

mi.showFlag = !mi.showFlag;

If showFlag is actually an NSNumber representing a BOOL , then you want:

mi.showFlag = @(![mi.showFlag boolValue]);