Merge branch 'CJL' into temp-wxr

wxr

2021-02-23 98d002e55304e5c8ff13b7cd195920975bef69f5

 HDL-ON_iOS/ViewController.cs

@@ -10,6 +10,18 @@
{
    public partial class ViewController : ViewControllerBase
    {

        public override void ViewWillAppear(bool animated)
        {
            base.ViewWillAppear(animated);
            //2021-02-01 设置NavigationBarHidden true
            if (this.NavigationController != null)
            {
                this.NavigationController.NavigationBar.Hidden = true;
                this.NavigationController.NavigationBar.TintColor = UIColor.Black;
            }
        }

        public override void ViewDidLoad()
        {
            base.ViewDidLoad();
@@ -55,6 +67,7 @@
            {

            }

        }
        public override UIStatusBarStyle PreferredStatusBarStyle()
        {