ZBarReaderView UIView相机方向问题

Question

我目前正在开发一个使用ZBarSDK读取QR码的iPad应用程序.

我正在使用ZBarReaderView (NOT UIViewController),所以我正在UIView使用绘制的前置摄像头CGRect(参见下面的代码).

我的问题是相机在视图中出现在它的侧面.iPad应用程序将仅开发为在横向模式下工作.

当UIView现在出现时,图像就在它的侧面,我不知道如何解决它.我尝试使用CGAffineTransform哪个成功地改变了角度,但是如果iPad被翻转,它将如何处理？

我看到了一些关于这个类似问题的其他帖子,但没有解决方案对我有用.值得注意的是我正在使用IOS6,请记住我正在使用ZBarReaderView,因此无法使用supportedOrientationsMask.

我希望用户无论是左侧还是右侧都能看到直立位置的摄像机视图.但是现在,无论转向哪个方向,视频都是侧面的(所以我可以看到自己与侧面成90度).在UIView当屏幕开启或者根本不会改变.我有点迷茫.

码:

- (void) viewDidAppear: (BOOL) animated {

    ZBarReaderView * readerView = [ZBarReaderView new];
    ZBarImageScanner * scanner = [ZBarImageScanner new];
    [scanner setSymbology: ZBAR_I25
                   config: ZBAR_CFG_ENABLE
                       to: 0];

    [readerView initWithImageScanner:scanner];
    readerView.readerDelegate = self;
    readerView.tracksSymbols = YES;

    readerView.frame = CGRectMake(20,220,230,230);
    readerView.torchMode = 0;
    readerView.device = [self frontFacingCameraIfAvailable];
    [readerView start];

    [self.view addSubview: readerView];

}

-(void)relocateReaderPopover:(UIInterfaceOrientation)toInterfaceOrientation {
    if (toInterfaceOrientation == UIInterfaceOrientationLandscapeLeft) {
        readerView.previewTransform = CGAffineTransformMakeRotation(M_PI_2);
    } else if (toInterfaceOrientation == UIInterfaceOrientationLandscapeRight) {
        readerView.previewTransform = CGAffineTransformMakeRotation(-M_PI_2);
    } else if (toInterfaceOrientation== UIInterfaceOrientationPortraitUpsideDown) {
        readerView.previewTransform = CGAffineTransformMakeRotation(M_PI);
    } else {
        readerView.previewTransform = CGAffineTransformIdentity;
    }
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    if (interfaceOrientation == UIInterfaceOrientationLandscapeLeft) {
        return YES;
    } else if (interfaceOrientation == UIInterfaceOrientationLandscapeRight) {
        return YES;
    } else {
        return NO;
    }
}

- (void) willRotateToInterfaceOrientation: (UIInterfaceOrientation) orient
                                 duration: (NSTimeInterval) duration
{
    if (orient == UIInterfaceOrientationLandscapeLeft) {
        [readerView willRotateToInterfaceOrientation: orient
                                            duration: duration];

    }
    if (orient == UIInterfaceOrientationLandscapeRight) {
        [readerView willRotateToInterfaceOrientation: orient
                                            duration: duration];

    }
}

- (BOOL)shouldAutorotate {

    UIInterfaceOrientation orientation = [[UIDevice currentDevice] orientation];

    if (orientation == UIInterfaceOrientationLandscapeLeft) {
        return YES;
    } else if (orientation == UIInterfaceOrientationLandscapeRight) {
        return YES;
    } else {
        return NO;
    }
}

-(NSUInteger) supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskLandscape;
}

Answer 1

我得到了同样的问题,并解决了它!

我只需要打电话:

[reader willRotateToInterfaceOrientation: toInterfaceOrientation duration: duration];

在包含ZbarReaderView的视图控制器的willRotate ...内.