屏幕旋转适配

如果根视图是tabbarController设置,否则不设置

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- (BOOL)shouldAutorotate {
    return [self.selectedViewController shouldAutorotate];
}
- (NSUInteger)supportedInterfaceOrientations {
    return [self.selectedViewController supportedInterfaceOrientations];
}

子类化UINavigationController，假设为BaseNavigationController

在BaseNavigationController设置如下方法

- (BOOL)shouldAutorotate
{
    return self.topViewController.shouldAutorotate;
}
-(UIInterfaceOrientationMask)supportedInterfaceOrientations
{
    return self.topViewController.supportedInterfaceOrientations;
}

随后添加自己的view controller，如果想禁止某个view controller的旋屏：（支持全部版本的控制）

- (BOOL)shouldAutorotate {
    return YES;
}

- (UIInterfaceOrientationMask)supportedInterfaceOrientations {
    return UIInterfaceOrientationMaskAllButUpsideDown;
}