Ios camera flash

sashapont

Is it possible to on/off camera flash?

jsulm

@sashapont It's all in the documentation: http://doc.qt.io/qt-5/qcameraflashcontrol.html

sashapont

I can clearly understand this doc...

I try this solution, but it is not work. Where is error?

auto* camera = new QCamera(QCamera::BackFace);
     QObject::connect(camera, &QCamera::stateChanged, [=](QCamera::State state){
        qDebug() << "state:" << state;
        if (state == QCamera::LoadedState) {
          auto *exposure = camera->exposure();
          qDebug() << "FlashTorch: " << exposure->isFlashModeSupported(QCameraExposure::FlashTorch);
          qDebug() << "FlashOn: " << exposure->isFlashModeSupported(QCameraExposure::FlashOn);
          if (exposure->isFlashModeSupported(QCameraExposure::FlashTorch)) {
            exposure->setFlashMode(QCameraExposure::FlashTorch);
          } else if (exposure->isFlashModeSupported(QCameraExposure::FlashOn)){
            exposure->setFlashMode(QCameraExposure::FlashOn);
          }
          qDebug() << "flashMode:" << exposure->flashMode();
        }
      });
      camera->load();

(sierdzio) Edit: added missing code tags

mvuori

The first error is this: You show code, but don't tell where it fails & how it behaves. Does the camera work without flash? Does stateChanged() fire? What is the dDebug() output?

Don't leave others guessing. The more information you give, the better. Others should not be expected do the basic debugging of your code for you.

sierdzio

Please also use code tags, it makes posts much more readable. I've already edited your post and added them here.

sashapont

@mvuori said in Ios camera flash:

The first error is this: You show code, but don't tell where it fails & how it behaves. Does the camera work without flash? Does stateChanged() fire? What is the dDebug() output?

Don't leave others guessing. The more information you give, the better. Others should not be expected do the basic debugging of your code for you.

It is not fails, but the flash is not on
In debug I have

state: QCamera::LoadedState
FlashTorch:  false
FlashOn:  false
flashMode: QFlags(0x2)

jsulm

@sashapont Looks like the flash modes you want to use are not supported. Could be that they are not implemented in Qt on iOS.

SGaist

Hi,

From a quick look at the sources, the flash is supported since 5.8. Which version of Qt are you using ?

sashapont

@SGaist said in Ios camera flash:

From a quick look at the sources, the flash is supported since 5.8. Which version of Qt are you using ?

5.9.1