Some function descriptions about qstring

1 Qstring::arg ()//replace string with string variable parameter • Minimum value

Example 1:

QString str;

str = QString ("%1 is born in%2."). Arg ("John"). Arg (1992);//srt = "John is born in 1992.";

Where%1 was substituted for "John"%2 was replaced by "1992"

Example 2:

QString i = "ITest"; //Current file ' s number

QString total = "Totaltest"; // number of files to process

QString fileName = "Filenametest"; //Current file ' s name

QString status = QString ("processing file%1 of% 2:%3"). Arg (i). Arg (total). Arg (fileName);

The result is: "Processing file iTest of Totaltest:filenametest"

2

QString str = "   123  4  ";

str = str.trimmed ();//Remove the white space character of the 2 end of the string as the result of "123 4"

    str = str.simplified ();//Remove the white space character of the 2 end of the string using a single whitespace character "" Instead of the white space characters that appear in the string result is "123 4"

    QString str = "1234";

    QString str1 = "Abxd";

    str = Str.insert (1, ' C ');//Insert another string or character at a specific location in the original string

str = str.insert (1, "QQ");

    Qdebug () <<str;//"1c234"

4 prepend ();//Insert another string at the beginning of the original string

5

QString str = "1234";

str = str.replace ("Qwer");//from the first position of the string, use the string in parentheses instead of the original number of characters

Qdebug () <<str;//results for "1qwer4"

Some function descriptions about qstring