iOS监听设备旋转方向

- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation
{
    if (self.interfaceOrientation == UIDeviceOrientationPortrait) {
        NSLog(@"竖直");
    } else if (self.interfaceOrientation == UIDeviceOrientationLandscapeLeft) {
        NSLog(@"水平向左");
    } else if(self.interfaceOrientation == UIDeviceOrientationLandscapeLeft) {
        NSLog(@"水平向右");
    }
}