IsRequired
检查字段是否为必填
示例
检查 PDF 中的表单字段是否必须在提交前填写。
// How can I determine if a form field is required in a PDF?
// Verify whether a form field must have a value in a PDF.
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());