Gets a value indicating whether there are any templates in the group 獲取一個(gè)指示組中是否有模板的值。
If a component does not have a template , but extends from a component class that does have a template , then the parent class ' template will be used by the child component 如果一個(gè)組件沒有模板,但繼承一個(gè)有模板的組件,那么父組件的模板會(huì)被用到子組件里。
If a component does not have a template , but extends from a component class that does have a template , then the parent class ' template will be used by the child component 如果一個(gè)組件沒有模板,但是他繼承于一個(gè)有模板的組件類,那么父類的模板將被應(yīng)用于子組件上。