QString 到 char* 的转换

2021-12-09 00:00:00 qt c++ qtcore qstring

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.

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());

您能否详细说明这种方法可能存在的缺陷，或者提供替代方法?

Can you elaborate the possible flaw with this method, or give an alternative method?

推荐答案

好吧，Qt常见问题说:

int main(int argc, char **argv)
{
 QApplication app(argc, argv);
  QString str1 = "Test";
  QByteArray ba = str1.toLocal8Bit();
  const char *c_str2 = ba.data();
  printf("str2: %s", c_str2);
  return app.exec();
}

所以也许您遇到了其他问题.这到底是怎么回事?

So perhaps you're having other problems. How exactly doesn't this work?

相关文章