'onTap' does not work in gestureRecognizers property

[Vignesh-dev12]

I need to get touch event in PDFView widget

Here my code

gestureRecognizers: {
     Factory<OneSequenceGestureRecognizer>(
            () => TapGestureRecognizer()
               ..onTap = () {
                 print("gestureRecognizers() onTap")
               })
},

[whutpsychic]

the same issue for me and i tried

gestureRecognizers: <Factory<OneSequenceGestureRecognizer>>[
                new Factory<OneSequenceGestureRecognizer>(
                  () => new EagerGestureRecognizer(),
                ),
              ].toSet()

still not work for me on iOS

[whutpsychic]

oh,hell bro.I found the solution

 gestureRecognizers: Set()
                ..add(Factory<TapGestureRecognizer>(() => TapGestureRecognizer()
                  ..onTapDown = (tap) {
                    print("hell bro");
                  })),

but I found this handler will be a little slow to response.And sometimes it cannot be responded

[tomriddle7]

oh,hell bro.I found the solution

 gestureRecognizers: Set()
                ..add(Factory<TapGestureRecognizer>(() => TapGestureRecognizer()
                  ..onTapDown = (tap) {
                    print("hell bro");
                  })),

but I found this handler will be a little slow to response.And sometimes it cannot be responded

I tried same code but it didn't worked.

[The-Redhat]

I think is issue a flutter issue: flutter/flutter#52002

[chrisbinsunny]

I found a solution for the issue. I was checking for the presense of onTapDown and added

gestureRecognizers: Set()
        ..add(Factory<TapGestureRecognizer>(() => TapGestureRecognizer()
          ..onTapDown = (tap) {
            print("hell bro");
          })),

But, it didn't work somehow. I was checking for other solutions and thought to add GestureDetector and detect tap from that.

So, I just wrapped PDFView with a GestureDetector. Surprisingly, gestureRecognizers inside PDFView worked after adding GestureDetector() Widget. Since I was checking for onTapDown event with gestureRecognizers, I added onTap parameter in GestureDetector.

My Widget looked like this:

GestureDetector(
    onTap: (){}, //This has to be added. Won't work without this.
    child: PDFView(
      filePath: widget.link,
      onError: (error) {
        print(error.toString());
      },
      onPageError: (page, error) {
        print('$page: ${error.toString()}');
      },
      onViewCreated: (PDFViewController pdfViewController) {
        pdfController=pdfViewController;
      },
      onPageChanged: (a, b){
        visible=false;
      },
      gestureRecognizers: Set()
        ..add(Factory<TapGestureRecognizer>(() => TapGestureRecognizer()
          ..onTapDown = (tap) {
            print("Tap Down Gesture Detected");
          })),
    ),
  )

Hope that helps...