Opening 'New' Document? - objective-c

Question

I have some code implemented in my myDocument.m file that simply attempts to load the last used document upon launch. However, upon launching from a fresh install, (or running after deleting the last used file) a 'new' document window does not appear. Does anyone know what to add to my code to do this? Here it is:
- (BOOL)applicationShouldOpenUntitledFile:(NSApplication *)sender
{
NSURL *lastURL=[[NSDocumentController sharedDocumentController] openDocumentWithContentsOfURL:lastURL display:YES error:nil];
if (lastURL!=nil)
{
[docController openDocumentWithContentsOfURL:lastURL display:YES error:nil];
return NO;
}
return YES;
}

Answer 1

- (BOOL)applicationShouldOpenUntitledFile:(NSApplication *)sender
{
NSArray* urls = [[NSDocumentController sharedDocumentController] recentDocumentURLs];
if ([urls count] > 0){
NSURL *lastURL= [urls objectAtIndex: 0];
if ([[NSDocumentController sharedDocumentController] openDocumentWithContentsOfURL:lastURL display:YES error:nil]){
return NO;
}
}
return YES;
}
EDIT
I changed it and tried it out it should work now.

Answer 2

What is docController, and why are you sending -openDocumentWithContentsOfURL:display:error: twice? Note that that method returns a document, not a URL, so using the return value as a URL wouldn’t work anyway.
The following is a cleaner, equivalent code:
- (BOOL)applicationShouldOpenUntitledFile:(NSApplication *)sender
{
id lastDoc = [[NSDocumentController sharedDocumentController]
openDocumentWithContentsOfURL:lastURL
display:YES error:NULL];
return (lastDoc == nil);
}
However, it still doesn’t explain why you don’t get an untitled document. What happens if you comment out -applicationShouldOpenUntitledFile: so that the application follows standard Cocoa behaviour? It could be the case that the problem lies elsewhere.