Question

In one of my iPhone application, I need to send the variable arguments to the action sheet conditionally. i.e

if(condition1)
    otherButtonTitles = @"Button1", @"Button2", nil
else
    otherButtonTitles = @"Button3", @"Button4", nil

UIActionSheet *mediaActionsSheet = [[UIActionSheet alloc] initWithTitle: nil
                                                             delegate: self
                                                    cancelButtonTitle: @"Cancel"
                                               destructiveButtonTitle: nil
                                                    otherButtonTitles: otherButtonTitles];

What is the syntax to do this? How should the data type for otherButtonTitles be defined?

Answer 1

You can’t. (Well, it’s not impossible, but you don’t want to do that.)

Just use

UIActionSheet *mediaActionsSheet=nil;
if(condition){
         mediaActionsSheet=[[UIActionSheet alloc] initWithTitle: nil
                                                         delegate: self
                                                cancelButtonTitle: @"Cancel"
                                           destructiveButtonTitle: nil
                                                otherButtonTitles: @"button1",@"button2",nil];
}else{
         mediaActionsSheet=[[UIActionSheet alloc] initWithTitle: nil
                                                         delegate: self
                                                cancelButtonTitle: @"Cancel"
                                           destructiveButtonTitle: nil
                                                otherButtonTitles: @"button2",@"button3",nil];
}

If you really want to construct a variable to hold variable number of arguments, start from this Wikipedia article. But you don’t really want to do that. I promise.