"UIScreen mainScreen] applicationFrame]" for Landscape mode

I have to ask it. Using

[[UIScreen mainScreen] applicationFram开发者_开发知识库e]

Is a beautiful way to get the working area of the iphone or ipad in portrait mode. But, if I want get the same size in landscape, there are other code, or I will have to create:

CGRect landscape = CGRectMake(0, 20, 1024, 748)

This is even not generic for iPhone and iPad.

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You can use [[[UIApplication sharedApplication] keyWindow] frame]