Flutter 在富文本中添加点击事件

TextSpan关键属性recognizer。

示例如下：

Text.rich(
  TextSpan(
    style: TextStyle(fontSize: setFont(20)),
    children: [
      TextSpan(
        text: '为保障您的个人隐私权益，请在登录前仔细阅读',
        style: TextStyle(color: Color(0xff999999))
      ),
      TextSpan(
        text: ' xxx隐私政策 ',
        recognizer: new TapGestureRecognizer()..onTap = () => {
          Navigator.of(context).push(MaterialPageRoute(builder: (context) {
            return WebViewBox(url: 'https://xxx.com/html/agreement/privacy.html');
          }))
        },
        style: TextStyle(color: Color(0xff586FA2))
      ),
      TextSpan(
        text: '以及',
        style: TextStyle(color: Color(0xff999999))
      ),
      TextSpan(
        text: 'xxx用户服务协议',
        recognizer: new TapGestureRecognizer()..onTap = () => {
          Navigator.of(context).push(MaterialPageRoute(builder: (context) {
            return WebViewBox(url: 'https://xxx.com/html/agreement/eula.html');
          }))
        },
        style: TextStyle(color: Color(0xff586FA2))
      ),
    ]
  ),
  textAlign: TextAlign.center,
)