iOS判断设备屏幕方向

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@property (nonatomic, strong) CMMotionManager* manager;
@property (nonatomic, strong) NSOperationQueue *queque;
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- (void)startMinitorOrientation
{
    self.manager.deviceMotionUpdateInterval = 1;
    if (self.manager.deviceMotionAvailable == YES)
    {
        __weak typeof(self) weak_self = self;
        [self.manager startDeviceMotionUpdatesToQueue:self.queque withHandler:^(CMDeviceMotion * _Nullable motion, NSError * _Nullable error) {
            [weak_self handleDeviceMotion:motion];
        }];
    }
    else
    {
        self.manager = nil;
    }
}

- (void)handleDeviceMotion:(CMDeviceMotion *)deviceMotion
{
    double x = deviceMotion.gravity.x;
    double y = deviceMotion.gravity.y;
    if (fabs(y) >= fabs(x))
    {
        if (y >= 0)
        {
            NSLog(@"反竖屏");
        }
        else
        {
            NSLog(@"竖屏");
        }
    }
    else
    {
        if (x >= 0)
        {
            NSLog(@"右横屏");
        }
        else
        {
            NSLog(@"左横屏");
        }
    }
}
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-(NSOperationQueue*)queque
{
    if (!_queque)
    {
        _queque=[[NSOperationQueue alloc] init];
    }
    return _queque;
}

-(CMMotionManager*)manager
{
    if (!_manager)
    {
        _manager=[[CMMotionManager alloc] init];
    }
    return _manager;
}