如何检测 iOS 上的 UI 方向是否被锁定？

Question

Is it possible to detect UI orientation is locked or not currently? If so, how can I do that?

I want to do something with gravity sensor when only UI orientation is not locked.

Answer 1

Not possible unfortunately, the lock is handled by the OS and is transparent to the app.

Answer 2

Why not try calling the shouldAutorotate method and see what BOOL value is returned?

I haven't tried looking for the UIOrientation lock. But off the top of my head, this is how I'd try.

if([self shouldAutorotateToInterfaceOrientation:UIInterfaceOrientationLandscapeLeft])
    NSLog(@"Rotates LandscapeLeft");

if([self shouldAutorotateToInterfaceOrientation:UIInterfaceOrientationLandscapeRight])
    NSLog(@"Rotates LandscapeRight");

if([self shouldAutorotateToInterfaceOrientation:UIInterfaceOrientationPortrait])
    NSLog(@"Rotates Portrait");

if([self shouldAutorotateToInterfaceOrientation:UIInterfaceOrientationPortraitUpsideDown])
    NSLog(@"Rotates PortraitUpsideDown");

Hopefully this solves your problem.