IOS上的Xamarin.Forms :删除SearchBar和NavigationBar之间的空格

var navigationPage = new NavigationPage(new YourContentPage());

public YourContentPage()
{
    NavigationPage.SetHasNavigationBar(this, false);
    NavigationPage.SetHasBackButton(this, false);
    NavigationPage.SetTitleView(this, new StackLayout()); // 隐藏导航栏
    NavigationPage.SetTitleIconImageSource(this, null); // 隐藏导航栏图标
    NavigationPage.SetTitleView(this, new ContentView()); // 隐藏导航栏标题
    NavigationPage.SetHasNavigationBar(this, false); // 隐藏导航栏
    NavigationPage.SetTitleView(this, new StackLayout()); // 隐藏导航栏
    NavigationPage.SetTitleIconImageSource(this, null); // 隐藏导航栏图标
    NavigationPage.SetTitleView(this, new ContentView()); // 隐藏导航栏标题
    InitializeComponent();
}