title: SingleSChildScrollView moves up in IOS
body: <p>I'm having a little issues with SingleChildScrollView in iOS.</p>
  
  <p>the app works well on android but moves up in iphoneXr.
  picture below.</p>
  
  <p><a href="https://i.stack.imgur.com/MJp4W.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/MJp4W.png" alt="enter image description here"></a></p>
  
  <p>Code follows.</p>
  
  <pre><code>      backgroundColor: Color.fromRGBO(3, 9, 23, 13),
        resizeToAvoidBottomPadding: false,
        body: SingleChildScrollView(
  
                child: Container(
            width: double.infinity,
            child: Stack(
              children: &lt;Widget&gt;[
                Positioned(
                  top: -50,
                  left: 0,
                  child: Container(
                    width: width,
                    height: 1000,
                    decoration: BoxDecoration(
                      image: DecorationImage(
                        image: AssetImage('assets/images/component.png'),
                        fit: BoxFit.fill,
                      ),
                    ),
                    child: new BackdropFilter(
                      filter: new ImageFilter.blur(sigmaX: 12.0, sigmaY: 12.0),
                      child: new Container(
                        decoration: new BoxDecoration(
                          color: Colors.white.withOpacity(0.0),
                        ),
                      ),
                    ),
                  ),
                ),
  
  </code></pre>