UITextInput仅在iOS 9中返回nil位置

Question

我正在尝试获取特定范围（ @Entity public class Employee { @Id @Column(name = "id") @GeneratedValue(strategy = GenerationType.AUTO) private Long langId; @Column(name = "first_name") private String firstName; @Column(name = "last_name") private String lastName; @OneToMany(fetch = FetchType.EAGER) @JoinColumn(name = "id", referencedColumnName = "employee_id") private Set<Certificate> certificates; ）的矩形。 问题是代码与UITextRange一起工作正常，我得到了 范围和矩形。不幸的是iOS 10行：

iOS 9

返回if let rangeStart = textInput.position(from: textInput.beginningOfDocument, offset: location)

nil

Answer 1

textView.isSelectable = true

此行在iOS 9中是必需的（在iOS 10中不是必需的）。