IsRequired
检查字段是否为必填
示例
获取并显示 PDF 文档中字段的必填属性。
// How can I is required using a base field in a PDF document?
// Is required for a base field in a PDF document.
let doc = Api.GetDocument();
let page = doc.GetPage(0);
let textField = Api.CreateTextField([10, 10, 160, 30]);
page.AddObject(textField);
textField.SetValue('Required: ' + textField.IsRequired());