Qt单个字符判断

1.相关说明

字符的Unicode编码、单个字符的判断

2.界面绘制

3.相关主要代码

#include "widget.h"
#include "ui_widget.h"Widget::Widget(QWidget *parent): QWidget(parent), ui(new Ui::Widget)
{ui->setupUi(this);
}Widget::~Widget()
{delete ui;
}// 每个字符的Unicode
void Widget::on_btnGetChars_clicked()
{// 获取输入框信息QString str = ui->editStr->text();if(str.isEmpty()) return;for(qint16 i = 0; i < str.size(); i++){QChar ch = str.at(i);char16_t uniCode = ch.unicode();QString chStr(ch);QString info = chStr + QString::asprintf("\t, Unicode编码=0x%X", uniCode);ui->plainTextEdit->appendPlainText(info);}
}// 清空文本框
void Widget::on_btnClear_clicked()
{ui->plainTextEdit->clear();
}// 每个字符特性判断
void Widget::on_btnCharJudge_clicked()
{QString str = ui->editChar->text();if(str.isEmpty()){return;}QChar ch = str.at(0);char16_t uniCode = ch.unicode();QString info = str + QString::asprintf("\t, Unicode编码=0x%X", uniCode);ui->plainTextEdit->appendPlainText(info);ui->checkDigit->setChecked(ch.isDigit());   // 是否为数字 0~9ui->checkLetter->setChecked(ch.isLetter()); // 是否为字母ui->checkLetterOrNum->setChecked(ch.isLetterOrNumber()); // 是否位数字或字母ui->checkUpper->setChecked(ch.isUpper());   // 是否为大写字母ui->checkLower->setChecked(ch.isLower());   // 是否为小写字母ui->checkMark->setChecked(ch.isMark());     // 是否为字符ui->checkSpace->setChecked(ch.isSpace());   // 是否为空白字符ui->checkSymbol->setChecked(ch.isSymbol()); // 是否为符号ui->checkPunct->setChecked(ch.isPunct());   // 是否为标点符号
}// 与Latin1的转换
void Widget::on_btnCvtLatin_clicked()
{QString str = "Dimple";ui->plainTextEdit->appendPlainText(str);QChar ch = QChar('P');str[0] = ch;ui->plainTextEdit->appendPlainText("\n"+str);
}// 与UTF-16的转换
void Widget::on_btnUtfCvt_clicked()
{QString str = "Hello,北京";ui->plainTextEdit->appendPlainText(str);QString cd = "成都";str[6] = cd.at(0);str[7] = cd.at(1);ui->plainTextEdit->appendPlainText("\n" + str);
}// QChar比较和替换
void Widget::on_btnCharCmpCvt_clicked()
{QString HuStr = "河to湖";QChar He = QChar::fromUcs2(HuStr[0].unicode());QChar Hu = QChar(HuStr[3].unicode());QString str = "他们来自河南或河北";ui->plainTextEdit->appendPlainText(str);for(int i = 0; i < str.size(); i++){if(str[i] == He){str[i] = Hu;}}ui->plainTextEdit->appendPlainText("\n"+str);
}