In IB (Interface Builder) set a delegate for “File's Owner”, such as MyAppController
Add this to the delegate of “File's Owner”
- (BOOL)application:(NSApplication *)theApplication openFile:(NSString *)filename
{
NSFileManager *fm = [NSFileManager defaultManager];
if([fm isReadableFileAtPath:filename]){
[self openLocation:filename];
return YES;
}
return NO;
}
- (void)openLocation:(NSString *)newLocation {
if([fileManager fileExistsAtPath:newLocation]){
// do something
}
}