Hello guys
I'm trying to show a NSAlert when the user click an button... but nothing happens. Here's the implementation code:
Code:
#import "untitled.h"
@implementation untitled
-(IBAction)showAlert:(id)sender
{
NSAlert *myAlert = [NSAlert alertWithMessageText:(@"Message") defaultButton:(@"OK") alternateButton:nil otherButton:nil informativeTextWithFormat:nil];
[myAlert beginSheetModalForWindow:mainWindow modalDelegate:self didEndSelector:nil contextInfo:nil];
}
@end
When I run the app and click on the button, this appears on the console:
Code:
2010-02-16 19:24:25.022 NSAlert[83640:a0f] *** -[NSPlaceholderString initWithFormat:locale:arguments:]: nil argument
What do you think?
(Beginner) NSAlert? 
Linear Mode
