我希望在视图出现IOS 6时知道设备方向

Question

I want to know device orientation when the view will appear. Previously it was possible using the shouldAutorotateToInterfaceOrientation method but in IOS 6 it is deprecated.

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {

    if (interfaceOrientation==UIInterfaceOrientationPortrait ||interfaceOrientation==UIInterfaceOrientationPortraitUpsideDown ) {
        DashBtn.hidden=NO;
    }
    else
    {
        DashBtn.hidden=YES;
        if (self.popoverControllerMain) {
            [self.popoverControllerMain dismissPopoverAnimated:YES];
        }


    }
    return YES;
}

I checked all the post ie making rootviewcontroller and

- (BOOL)shouldAutorotate {
    return NO;
}// this method is not called

- (NSUInteger)supportedInterfaceOrientations {
    return UIInterfaceOrientationMaskPortrait;
}

Answer 1

Try using

-(void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration

instead of

(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation 

refer http://developer.apple.com/library/ios/#documentation/uikit/reference/UIViewController_Class/Reference/Reference.html for details.

Answer 2

Create category of UINavigationController and add below code @implementation UINavigationController (Rotation_IOS6)

-(BOOL)shouldAutorotate { return [[self.viewControllers lastObject] shouldAutorotate]; }

-(NSUInteger)supportedInterfaceOrientations { return [[self.viewControllers lastObject] supportedInterfaceOrientations]; }

• (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation { return [[self.viewControllers lastObject] preferredInterfaceOrientationForPresentation]; }

@end

Answer 3

了解设备方向的最佳选择是

[[UIApplication sharedApplication] statusBarOrientation]