NSImageView fails to setImage?

I'm trying to create a simple ImageView that just loads an image from disk, but this isn't working (I put it in my applicationDidFinishLoading):

NSString *file = [@"~/update.png" stringByStandardizingPath];
NSImage *image = [[NSImage alloc] initWithContentsOfFile:file];
[wView setImage:image];

Apparently the image for the NSImageView isn't being set, because if I NSLog [wView image], I get (null). I'm pretty sure I'm making a beginner mistake here, but what?

The file and image load fine; if I draw the image to an NSView it shows up fine. wView isn't nil, and I tried making another project with the default window's view a custom NSImageView subclass whose initWithFrame: call开发者_如何学Pythons setImage. Still nothing.

(OP here with an actual account)

So it turns out that setImage doesn't work on an NSImageView that's explicitly constructed in IB, if you get what I mean. I made an NSView subclass that constructs an NSImageView inside it and calls setImage, and that worked fine. Really annoying.

Most likely, wView is nil. The most common reason for this is when a class that's instantiated in the nib with a connection to a view also gets instantiated a second time in code.