依据函数名字符串执行函数

这个问题虽然不是很严重，但却困扰本人许久。曾经多方询问朋友、查阅资料均无法达到效果。

今日偶然查到一些东西，经实测的却可行，也算了却了一桩心愿。

不再废话直接贴DEMO代码

 1 unit Unit2;
 2
 3 interface
 4
 5 uses
 6   Vcl.Dialogs, Vcl.Forms, System.Generics.Collections, System.Variants;
 7
 8 type
 9   TMyIntf = class(TForm)
10   public
11     class function PublicFunc(FuncName : string; DicIn, DicOut: TDictionary<string, Variant>): Boolean;
12   published
13     function Red(DicIn, DicOut: TDictionary<string, Variant>): Boolean;
14     function Black(DicIn, DicOut: TDictionary<string, Variant>): Boolean;
15     function Blue(DicIn, DicOut: TDictionary<string, Variant>): Boolean;
16     function Green(DicIn, DicOut: TDictionary<string, Variant>): Boolean;
17   end;
18
19 implementation
20
21 { TMyIntf }
22
23 function TMyIntf.Black(DicIn, DicOut: TDictionary<string, Variant>): Boolean;
24 begin
25   DicOut.AddOrSetValue(‘Color‘, ‘Black‘);
26   Result := True;
27 end;
28
29 function TMyIntf.Blue(DicIn, DicOut: TDictionary<string, Variant>): Boolean;
30 begin
31   DicOut.AddOrSetValue(‘Color‘, ‘Blue‘);
32   Result := True;
33 end;
34
35 function TMyIntf.Green(DicIn, DicOut: TDictionary<string, Variant>): Boolean;
36 begin
37   DicOut.AddOrSetValue(‘Color‘, ‘Green‘);
38   Result := True;
39 end;
40
41 class function TMyIntf.PublicFunc(FuncName : string; DicIn,
42   DicOut: TDictionary<string, Variant>): Boolean;
43 var
44   Func : function(DicIn, DicOut: TDictionary<string, Variant>): Boolean of object;
45 begin
46   Result := False;
47   TMethod(Func).Code := TMyIntf.MethodAddress(FuncName);
48   if Assigned(TMethod(Func).Code) then
49     if Func(DicIn, DicOut) then
50       Result := True;
51 end;
52
53 function TMyIntf.Red(DicIn, DicOut: TDictionary<string, Variant>): Boolean;
54 begin
55   DicOut.AddOrSetValue(‘Color‘, ‘Red‘);
56   Result := True;
57 end;
58
59 end.

调用非常简单，引用单元然后直接调用类函数PublicFunc即可。

此篇如若有幸被大家浏览，若您有更好的方法请不吝赐教！拜谢！