Barcode scanning not consistent on IOS.

[zhhjoseph]

Bug Report

To Do First

• Did you try latest release?
• Did you try master? No
• Did you look for existing matching issues?

Platforms

Versions

• Android:
• iOS:
• react-native-camera: ^3.40.0
• react-native: 0.61.2
• react: 16.9.0

Description/Current Behaviour

Android works mostly fine. On IOS, in order for barcode to register, I would need to move the camera closer to the barcode so that the width of the barcode fills the screen. Once I move farther, the barcode does not register anymore. I do not encounter this in android. This is all in portrait mode. Also scanning on IOS seem to register a bit slower than Android. Compared to a native barcode scanner on ios there is a noticeable difference, is there anyway to improve that?

Expected Behaviour

Barcode should register at a reasonable distance without having to move camera to have barcode width fill the width of camera.

Steps to Reproduce

Attempt to scan barcode without having to move camera closer to have barcode width fill screen.

Additionals

I did read that this feature here #1852 should help with my issue however there seems to be no difference after implementing it. Is rectOfInterest prop working properly for Ios? There are a couple of PRs that are still open and I would prefer to not fork a version of react-native-camera.

The code:

          <RNCamera
            ref={ref => {
              this.camera = ref
            }}
            rectOfInterest={{
              x: 0.25,
              y: 0.25,
              width: 0.5,
              height: 0.5,
            }}
            flashMode={this.state.camera.flashMode}
            type={this.state.camera.type}
            onGoogleVisionBarcodesDetected={
             shouldBarCodeRead ? this.onBarCodeRead : null
            }
            googleVisionBarcodeType={this.state.barcodeType}
            style={{ flex: 1 }}
          />

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[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions. You may also mark this issue as a "discussion" and i will leave this open.

[stale]

Closing this issue after a prolonged period of inactivity. Fell free to reopen this issue, if this still affecting you.

[yorickshan]

same issue，any solution ？