相机变焦适用于iPhone，但不适用于iPad

Question

我正在使用iOS-Cordova跨平台。 我正在从github访问Camera API com.mbppower.camerapreview。 我想放大并缩小我的相机并希望通过原生iOS类捕获图像，我的代码适用于iPhone但不适用于iPad。

AnyOne请帮忙？ 我的代码是： -

const CGFloat pinchVelocityDeviderFactor = 1.0f;
AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];

if (([pinchRecognizer state] == UIGestureRecognizerStateBegan) ||
    ([pinchRecognizer state] == UIGestureRecognizerStateChanged)) {

    //Error Message.
    NSError *error = nil;
    static CGFloat vf;//MAX(1.0, MIN(desiredZoomFactor, self.videoDevice.videoZoomFactor));

    if((1.0 <= pinchRecognizer.scale) && (2.5 >= pinchRecognizer.scale))
    {
        //Setting vf.
        vf = 1.0 + pinchRecognizer.scale * pinchVelocityDeviderFactor;

        //Get Return Value of lock configuraton.
        BOOL bRet = [device lockForConfiguration:&error];

        //Lock Configuration.
        if(bRet)
        {
            //if(1.0 <= vf && vf <= 2.5)
            //Set Zoom factor.
            device.videoZoomFactor = vf;

            //Unlock Device Configuration.
             [device unlockForConfiguration];
        }
    }
}

我的应用程序成为iPad的崩溃。

＆＃39; NSRangeException＆＃39;，原因：＆＃39; *** - [AVCaptureVideoDevice setVideoZoomFactor：] - 传递的videoZoomFactor 1.141650超出范围[1，activeFormat.videoMaxZoomFactor]＆＃39;

请帮助伙计们 谢谢