QString到char *转换 [英] QString to char* conversion

问题描述

我试图通过以下方法将QString转换为char *类型，但它们似乎不起作用。

  // QLineEdit * line = new QLineEdit（）; {只是为了描述这里的行} 
 
 QString temp = line-> text（）; 
 char * str =（char *）malloc（10）; 
 QByteArray ba = temp.toLatin1（）; 
 strcpy（str，ba.data（））;你可以用这个方法来阐述可能的缺陷，或者给出一个替代方法吗？
 $ 
 
 b $ b 
解决方案
好吧， Qt常见问题说：
  int main（int argc，char ** argv）
 {
 QApplication app（argc，argv）; 
 QString str1 =Test; 
 QByteArray ba = str1.toLatin1（）; 
 const char * c_str2 = ba.data（）; 
 printf（str2：％s，c_str2）; 
 return app.exec（）; 
} 
  
所以也许你还有其他问题。这到底是什么工作？
 
I was trying to convert a QString to char* type by the following methods, but they don't seem to work.
//QLineEdit *line=new QLineEdit();{just to describe what is line here}

QString temp=line->text();
char *str=(char *)malloc(10);
QByteArray ba=temp.toLatin1();
strcpy(str,ba.data());
Can you elaborate the possible flaw with this method, or give an alternative method?
解决方案
Well, the Qt FAQ says:
int main(int argc, char **argv)
{
 QApplication app(argc, argv);
 QString str1 = "Test";
 QByteArray ba = str1.toLatin1();
 const char *c_str2 = ba.data(); 
 printf("str2: %s", c_str2);
 return app.exec();
}
So perhaps you're having other problems. How exactly doesn't this work?

                        
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