Change background of window in Cocoa

Question

Objective-C/Cocoa noob here. I'd like to make the window color in a little Mac app I'm making white, instead of the default light grey color. What's the proper way to do this?

Accepted Answer

From the AppDelegate you can simply invoke the `window` property

```
self.window.backgroundColor = [NSColor whiteColor];
```

otherwise from any point of you application you can call

```
[[NSApplication sharedApplication] keyWindow].backgroundColor = [NSColor whiteColor];
```

`keyWindow` is the currently "on top" window, which is probably the only one if the application is simple. For more complicated scenarios where you need a different window you can use

```
[[NSApplication sharedApplication] windows]
```

which will return an array of all the windows owned by the application.

Change background of window in Cocoa

Solution

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