macOS Quick Q about using sheets

[stadidas]

I've looked at this code for launching a custom sheet from Apple:

if (!myCustomSheet) 
        [NSBundle loadNibNamed: @"MyCustomSheet" owner: self];

    [NSApp beginSheet: myCustomSheet 
            modalForWindow: window 
            modalDelegate: self 
            didEndSelector: @selector(didEndSheet:returnCode:contextInfo:) 
            contextInfo: nil];

I'm trying to use this code in MyDocument.m, but I don't know what to pass for the modalForWindow parameter. Everything I try gets an error. Does anyone know what to pass it to get a sheet to load in the MyDocument window?

 

[kainjow]

If you're calling it from your NSDocument subclass (MyDocument by default), you can use the windowForSheet method.

 

[HiRez]

First of all, what is the error you're getting? And how do you know that it's the "modalForWindow" parameter that's causing the error? Also, what class are you calling it from (and what superclasses)? And from what method? For example, is "window" a valid object? It won't be if awakeFromNib:/windowDidLoadNib: has not been called, or if that outlet hasn't been connected to a window in IB.

 

[caveman_uk]

It depends what your controller object is a subclass of. Is 'window' defined? Maybe [self window] would work better if it is? If it isn't, define an IBOutlet NSWindow* in your code and connect it in IB to the parent window in IB.

 

[HiRez]

Looking at an example in my own code, I was using [self window]. But yeah...it really depends.

 

[stadidas]

I used kainjow's solution which worked very nicely.