07.TabView使用

https://www.hackingwithswift.com/books/ios-swiftui/creating-tabs-with-tabview-and-tabitem

切圆角

.cornerRadius(14)
.clipShape(Capsule())

导航栏形式

默认大标题

.navigationBarTitleDisplayMode( xx )

/**
/// Inherit the display mode from the previous navigation item.
case automatic

/// Display the title within the standard bounds of the navigation bar.
case inline

/// Display a large title within an expanded navigation bar.
case large
*/