公司APP項(xiàng)目的登錄頁有一個(gè)人機(jī)驗(yàn)證功能，需要實(shí)現(xiàn)在登錄按鈕下邊放置一個(gè)webview來加載驗(yàn)證頁面岸晦，在點(diǎn)擊登錄按鈕時(shí)需要將點(diǎn)擊事件穿透到下邊的webview，由webview處理人機(jī)驗(yàn)證睛藻。

在flutter中也可以實(shí)現(xiàn)這樣的事件穿透启上，需要使用IgnorePointer或者AbsorbPointer，這兩個(gè)widget的作用是都是忽略命中測(cè)試店印，區(qū)別是IgnorePointer不可以在子組件當(dāng)中接收命中測(cè)試事件冈在，AbsorbPointer可以接收命中測(cè)試。

flutter具體實(shí)現(xiàn)：
使用IgnorePointer

return Listener(
      child: Stack(
        children: <Widget>[
          ConstrainedBox(
            constraints: BoxConstraints.tight(Size(ScreenUtil().screenWidth - 32, 52.0)),
            child: WebView(
              onWebViewCreated: (c){
                _controller = c;
              },
              initialUrl: url,
              javascriptMode: JavascriptMode.unrestricted,
            ),
          ),
          // IgnorePointer
          IgnorePointer(
            child: Container(
              padding: EdgeInsets.zero,
              height: 52,
              width: ScreenUtil().screenWidth - 32,
              child: CupertinoButton(
                child: Text(
                  '登錄',
                  style: TextStyle(
                    color: Colors.white,
                    fontSize: 16,
                    fontWeight: FontWeight.w500,
                  ),
                ),
                onPressed: () {
                  //不會(huì)打印
                  print('點(diǎn)擊了登錄按鈕');
                },
                color: Colors.blue,
              ),
            ),
          ),
        ],
      ),
      onPointerDown: (event){
        print("點(diǎn)擊了整體區(qū)域");
      },
    );

使用AbsorbPointer

return Listener(
      child: Stack(
        children: <Widget>[
          ConstrainedBox(
            constraints: BoxConstraints.tight(Size(ScreenUtil().screenWidth - 32, 52.0)),
            child: WebView(
              onWebViewCreated: (c){
                _controller = c;
              },
              initialUrl: url,
              javascriptMode: JavascriptMode.unrestricted,
            ),
          ),
          // AbsorbPointer
          AbsorbPointer(
            absorbing: false,//需要設(shè)置這個(gè)屬性才可以使子組件接收命中測(cè)試
            child: Container(
              padding: EdgeInsets.zero,
              height: 52,
              width: ScreenUtil().screenWidth - 32,
              child: CupertinoButton(
                child: Text(
                  '登錄',
                  style: TextStyle(
                    color: Colors.white,
                    fontSize: 16,
                    fontWeight: FontWeight.w500,
                  ),
                ),
                onPressed: () {
                //會(huì)打印
                 print('點(diǎn)擊了登錄按鈕');
                },
                color: Colors.blue,
              ),
            ),
          ),
        ],
      ),
      onPointerDown: (event){
        print("點(diǎn)擊了整體區(qū)域");
      },
    );