如何在导航控制器中自动旋转子视图

Question

我在导航控制器中有一个子视图，当ipad模拟器旋转为纵向或横向时，主视图会自动旋转以适合ipad方向，但子视图则不会。子视图也可以旋转，但不适合 ipad 方向，子视图方向始终朝向 ipad home 按钮横向。

我的问题是，如何使子视图自动旋转并具有像主视图的方向一样的方向？？？

有人可以帮助我吗...

Answer 1

我已经解决了这个问题。

我在子视图viewController类中使用NSNotification函数，在viewWillAppear方法中，这是我的实现：

[[NSNotificationCenter defaultCenter]
 addObserver:self
 selector:@selector(deviceRotated:)
 name:UIDeviceOrientationDidChangeNotification
 object:[UIDevice currentDevice]];

然后，这是deviceRotated方法：

-(void)deviceRotated:(id)sender{
    UIDeviceOrientation orientation = [[UIDevice currentDevice]orientation];
    if (orientation == UIDeviceOrientationPortrait) {
        CGAffineTransform rotate = CGAffineTransformMakeRotation (0.0);
        CGAffineTransform translate = CGAffineTransformMakeTranslation(0, 30);
        self.alertView.transform = CGAffineTransformConcat(translate, rotate);

    }   
    else if (orientation == UIDeviceOrientationPortraitUpsideDown) {
        CGAffineTransform rotate = CGAffineTransformMakeRotation (M_PI * 180 / 180.0f);
        CGAffineTransform translate = CGAffineTransformMakeTranslation(-63, -100);
        self.alertView.transform = CGAffineTransformConcat(translate, rotate);

    }else if (orientation == UIDeviceOrientationLandscapeLeft) {
        CGAffineTransform rotate = CGAffineTransformMakeRotation (M_PI * 90 / 180.0f);
        CGAffineTransform translate = CGAffineTransformMakeTranslation(60, -180);
        self.alertView.transform = CGAffineTransformConcat(translate, rotate);


    }else if (orientation == UIDeviceOrientationLandscapeRight) {
        CGAffineTransform rotate = CGAffineTransformMakeRotation ( M_PI * 270 / 180.0f);
        CGAffineTransform translate = CGAffineTransformMakeTranslation(-60, -140);
        self.alertView.transform = CGAffineTransformConcat(translate, rotate);

    }   
}

最后，问题解决了。 这个是对我有帮助的链接。