Spinner是一种能够从多个选项中选一选项的控件，类似于桌面程序的组合框（ComboBox），但没有组合框的下拉菜单，而是使用浮动菜单为用户提供选择 -Spinner is a way to select an option from several options the controls, similar to the desktop combo box (ComboBox), but there is no combo box' s drop-down menu, but us