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» 请教一个TAAFont的问题?(宏定义相关)问题已解决!
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Subject: 请教一个TAAFont的问题?(宏定义相关)问题已解决!
lygily
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Post at 2008-4-7 16:12
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请教一个TAAFont的问题?(宏定义相关)问题已解决!
TAAFont * AAFont = new TAAFont(tBitmap->Canvas);
AAFont->TextOutA(50, 250,"TEST", 50, 0);
C++ Builder报如下错:
[Linker Error] Unresolved external '__fastcall Aafont::TAAFont::TextOutA(int, int, System::AnsiString, signed char, signed char)' referenced from D:\BCB_PROJECT\20080407\UNIT1.OBJ
请问是什么回事?多谢了!
附我用的是2.63版本的AAFont
BCB版本为6.0
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本帖最后由 lygily 于 2008-4-9 10:51 编辑
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zjy
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#2
Post at 2008-4-8 08:16
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TAAFont 没有 TextOutA 方法,应该用 TextOut。
Zhou JingYu
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lygily
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Post at 2008-4-8 09:01
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续:TAAFont
用TextOut也是一样的,报的错也是报 TextOutA无定义,所以如果写上TextOut,结果也一样报如下错:
[Linker Error] Unresolved external '__fastcall Aafont::TAAFont::TextOutA(int, int, System::AnsiString, signed char, signed char)' referenced from D:\BCB_PROJECT\20080407\UNIT1.OBJ
因为编译器会自动判断该用TextOutA还是TextOutW,一般头文件中会有如下定义:
#ifdef UNICODE
#define TextOut TextOutW
#else
#define TextOut TextOutA
#endif // !UNICODE
那如果没有定义TextOutA,而编译器又主张去调用,是否是产生这个问题的原因?
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本帖最后由 lygily 于 2008-4-8 09:09 编辑
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zjy
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Post at 2008-4-8 15:55
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OH,原来是宏的问题
你可以试试在调用 TextOut 之前 #undef TextOut,看能不能解决?
Zhou JingYu
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lygily
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Post at 2008-4-8 17:09
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回复 #4 zjy 的帖子
加了没有效果,还是报相同的问题。
不过还是要感谢zjy的关注!
[
本帖最后由 lygily 于 2008-4-8 17:12 编辑
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zjy
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Post at 2008-4-9 10:21
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把 #undef TextOut 放在 #include <vcl.h> 和 #include "AAFont.hpp" 中间,在BCB6下编译通过:
#include <vcl.h>
#pragma hdrstop
#undef TextOut
#include "Unit1.h"
#include "AAFont.hpp"
Zhou JingYu
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lygily
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Post at 2008-4-9 10:50
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回复 #6 zjy 的帖子
可以了,多谢了!
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