[英]Class field (static field) in Delphi
There is a class TPerson. 有一个类TPerson。 It is known that FSecondName unique to each object. 众所周知,FSecondName对每个对象都是唯一的。
type
TPerson = class(TObject)
private
FAge: Integer;
FFirstName: String;
FSecondName: String;
public
property Age: Integer read FAge;
property FirstName: String read FFirstName;
property SecondName: String read FSecondName;
constructor Create;
end;
How can I add a class field (like static field in C#) Persons: TDictionary (String, TPerson), where the key is SecondName and the value is an object of class TPerson. 如何添加类字段(如C#中的静态字段)Persons:TDictionary(String,TPerson),其中键是SecondName,值是类TPerson的对象。
Thanks! 谢谢!
You can declare a class variable: 您可以声明一个类变量:
type
TMyClass = class
private
class var
FMyClassVar: Integer;
end;
Obviously you can use whatever type you like for the class variable. 显然,你可以使用你喜欢的任何类型的类变量。
Class variables have global storage. 类变量具有全局存储。 So there is a single instance of the variable. 所以变量有一个实例。 A Delphi class variable is directly analagous to a C# static field. Delphi类变量与C#静态字段直接相似。
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