Why I can't see the background image in the device, but appears on the simulator?

Here is the viewDidLoad:

[self.view setBackgroundColor:[UIColor colorWithPatternImage:[UIImage imageNamed:@"bg.png开发者_C百科"]]];

It can show the simulator, but not on the device, why?? thz.

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Also check that the image isn't a PSD named with a PNG extension. The Simulator can show PSD images, the device can't. :)

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The device is case-sensitive, so make sure you've got bg.png exactly right.