macOS Multiple NSDocuments & Shared Instances

[skunkworker]

So i've got a nsdocument-based application that can have multiple documents open at a time.And I have a number of different views and data classes for managing everything.
It all works great until I try to create a shared instance that allows the other views to pull data and access the editordocument class
like

[[EditorDocument sharedInstance] editingState]

And in the main NSDocument class

EditorDocument *g_SharedInstance = nil;

+ (EditorDocument*) sharedInstance {
assert (g_SharedInstance != NULL);

if (g_SharedInstance == nil) {
g_SharedInstance = [EditorDocument alloc];
} 

return g_SharedInstance;
}

 

[Catfish_Man]

So, there's a few things wrong here. First and foremost: it's basically never correct to call +alloc without -init*. Secondarily: if you support multiple documents, how can you have the document stored in a single global variable?

 

[skunkworker]

So, there's a few things wrong here. First and foremost: it's basically never correct to call +alloc without -init*. Secondarily: if you support multiple documents, how can you have the document stored in a single global variable?

I have been trying to move it from a single document based to multiple document based.