在 Delphi XE5 中使用方式多 TList

Question

我想在 Delphi 中使用 multi TList。例如：

var
 temp1List : TList;
 temp2List : TList;
begin
 temp1List := TList.Create;
 temp2List := TList.Create;
 temp1List.add(temp2List);
end;

我认为这是不正确的，因为TList 接受参数作为Pointer 值。

有没有办法使用多个TList？

Answer 1

改为查看通用 TList<T>，例如：

uses
  ..., System.Classes, System.Generics.Collections;

var
  temp1List : System.Generics.Collections.TList<System.Classes.TList>;
  temp2List : System.Classes.TList;
begin
  temp1List := System.Generics.Collections.TList<System.Classes.TList>.Create;
  temp2List := System.Classes.TList.Create;
  temp1List.Add(temp2List);
  // don't forget to free them when you are done...
  temp1List.Free;
  temp2List.Free;
end;

另外，由于TList 是类类型，您可以改用TObjectList<T>，并利用其OwnsObjects 功能：

uses
  ..., System.Classes, System.Generics.Collections;

var
  temp1List : System.Generics.Collections.TObjectList<System.Classes.TList>;
  temp2List : System.Classes.TList;
begin
  temp1List := System.Generics.Collections.TObjectList<System.Classes.TList>.Create; // takes Ownership by default
  temp2List := System.Classes.TList.Create;
  temp1List.Add(temp2List);
  // don't forget to free them when you are done...
  temp1List.Free; // will free temp2List for you
end;