qt - Qt 中的 QString::sprintf 和 QString::arg 有什么区别？

Question

QString 文档 http://doc.qt.io/qt-5/qstring.html#arg说

One advantage of using arg() over sprintf() is that the order of the numbered place markers can change, if the application's strings are translated into other languages, but each arg() will still replace the lowest numbered unreplaced place marker, no matter where it appears.

这是什么意思？谁能举例说明一下吗？

Answer 1

int day = 1;
int month = 12;
int year = 2010;
QString dateString = QString(tr("date is %1/%2/%3")).arg(month).arg(day).arg(year);
// dateString == "date is 12/1/2010";

德语翻译“Das Datum ist: %2.%1.%3”: dateString = "Das Datum ist: 1.12.2010"