Uncommon usage of qstring

QString Str ("Hello");

QString str = "Hello";

static const Qchar Data[4] = {0x0055, 0x006e, 0x10e3, 0x03a3};
QString Str (data, 4);

QString str;
Str.resize (4);

Str[0] = Qchar (' U ');
STR[1] = Qchar (' n ');
STR[2] = Qchar (0X10E3);
STR[3] = Qchar (0X03A3);

QString str;
str.sprintf ("%s%.3f", "float", 3.1415926);
Str result is "float 3.14"

QString str;
Str.setnum (10); str = "10"
Str.setnum (10, 16); str = "a"
Str.setnum (10.12345); str = "10.12345"

QString i; Current file ' s number
QString Total; Number of files to process
QString FileName; Current file ' s name

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

Reference: http://blog.csdn.net/xgbing/article/details/7770854

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1) Char * initialization

QString str = "Hello";

QString converts the const char * data into Unicode using the Fromascii () function.

2) qchar[] array initialization

CPP Code

1. Static const Qchar Data[4] = {0x0055, 0x006e, 0x10e3, 0x03a3};
2. QString Str (data, 4);

You can do that.

CPP Code

1. Qregexp pattern;
2. Static const Qchar unicode[] = {0x005a, 0x007F, 0X00A4, 0x0060,
3. 0x1009, 0x0020, 0x0020};
4. int size = sizeof (Unicode)/ sizeof (QCHAR);
5. QString str = qstring::fromrawdata (Unicode, size);

3) can also be initialized with the risize () function and each Qchar character

CPP Code

1. QString str;
2. Str.resize (4);
4. Str[0] = Qchar (' U ');
5. STR[1] = Qchar (' n ');
6. STR[2] = Qchar (0X10E3);
7. STR[3] = Qchar (0X03A3);

Each character read through the at () function

CPP Code

1. QString str;
3. For (int i = 0; i < str.size (); ++i) {
4. if (str.at (i) >= Qchar (' a ') && str.at (i) <= Qchar (' F '))
5. Qdebug () << "Found character in range [a-f]";
6. }

Reference: http://qimo601.iteye.com/blog/1432867

Uncommon usage of qstring