We have upgraded to the SDK 4.7, since doing this the torch icon in the upper left of the screen seems to be quite stretched

Check if you are using the method setTorchButtonRelativeX

Since 4.7 there are new icons and the aspect rate has changed, so you need to adjust these values.

For example:

[self.barcodePicker.overlayController setTorchButtonLeftMargin:15 topMargin:35 width:40 height:40];

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