Avoid hardcoding iPhone screen size with programma

问题:

I was looking up how to create a view programmatically and found the following example code:

self.view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)];

This works great, except I don't like that it hardcodes the size of the screen. Is there a way to look up the size of the screen? An important point someone brought up is that if the app is running during a phone call then the screen will be slightly smaller because of the green "return to call" bar.

回答1:

Is there a way to look up the size of the screen?

Yup:

CGRect screenRect = [[UIScreen mainScreen] applicationFrame];

applicationFrame

This property contains the screen bounds minus the area occupied by the status bar, if it is visible. Using this property is the recommended way to retrieve your application’s initial window size. The rectangle is specified in points.

回答2:

[[UIScreen mainScreen] bounds] or [[UIScreen mainScreen] applicationFrame]

should be all you need to get the full screen size.

I've only used the applicationFrame version myself.

(I also suggested [UIHardware fullScreenApplicationContentRect] but that was from some very old code - don't use it)