5_QT_qt5登陆界面_QTcreator_login

#include "logindialog.h" #include "ui_logindialog.h" #include "sign_in.h" #include "modifypassword.h" #include "modify_login.h" #include <QMessageBox> #include <QFile> #include <QIODevice> #include <QtCore/QCoreApplication> #include <QDebug> #include <QTextCodec> int num = 3; //密码容错次数 LoginDialog::LoginDialog(QWidget *parent) : QDialog(parent), ui(new Ui::LoginDialog) { ui->setupUi(this); } LoginDialog::~LoginDialog() { delete ui; } void LoginDialog::loadfile() { //从文件加载信息进来 QString readData; QFile flie1("user.txt"); if(!flie1.open(QIODevice::ReadOnly | QIODevice::Text)) { QMessageBox::warning(this, "ERROR","Cannot open the file!"); } else { QTextStream ts(&flie1); while(!ts.atEnd()) { readData = ts.readLine(); QStringList qlist = readData.split(";"); //分割字符串，将“admin;123456”分成两部分 ulist.append(new userObject(qlist.at(0), qlist.at(1), qlist.at(2))); //把文件中的数据按一个用户合体组装，全部装入ulist } flie1.close(); } } void LoginDialog::rewriteFile() { QString readData; QFile flie1("user.txt"); if(!flie1.open(QIODevice::WriteOnly | QIODevice::Text)) { //在这里不用append，而是用修改后的信息覆盖原信息 QMessageBox::warning(this, "ERROR","Cannot open the file!"); } else { QTextStream ts(&flie1); for(int i=0; i<ulist.size(); i++) { //把不定长的ulist中的内容全部写回文件中 ts << ulist[i]->Username << ";" << ulist[i]->Account << ";" << ulist[i]->Password << endl; } flie1.close(); } } void LoginDialog::login() { QString user = ui->username->text(); QString password = ui->pass->text(); QString readData; int flag = 0; QFile flie1("user.txt"); //--1》判断能否成功读文件 if(!flie1.open(QIODevice::ReadOnly | QIODevice::Text)) { QMessageBox::warning(this, "ERROR","Cannot open the file!"); } else { QTextStream ts(&flie1); while(!ts.atEnd()) { readData = ts.readLine(); QStringList qlist = readData.split(";"); //分割字符串，将“admin;123456”分成两部分 //----------2》判断用户名和密码是否匹配 if(qlist.at(1) == user && qlist.at(2) == password) { //用户名和密码分别位于第二个和第三个 for(int i=0; i<abnormal_ulist.size(); i++) { //------------------3》判断用户状态是否异常 if(user == abnormal_ulist[i]) { QMessageBox::warning(this, "WARNING", "Sorry, " "Your account is blocked."); break; } } flag = 1; break; } } flie1.close(); } if(flag) { if(num > 0) { accept(); } else { QMessageBox::warning(this, "WARNING", "Sorry, " "Your account is blocked."); } } else { QString status = QString("password and account unmatched, \n" "NOTICE!you have %1 chances to failed.").arg(num); num--; if(num < 0) { QMessageBox::warning(this, tr("Warning!"), tr("password and account unmatched.\n" "Sorry, You have no chance left. ")); } else { QMessageBox::warning(this, tr("Falied!"), status); } ui->username->clear(); ui->pass->clear(); ui->username->setFocus(); } //记录密码错误次数 if(num < 0) { QString abnormal_user = ui->username->text(); QMessageBox::warning(this, tr("Warning!"), tr("If you have forgot your password, " "try changing it.")); abnormal_ulist.append(abnormal_user); ui->username->clear(); ui->pass->clear(); ui->username->setFocus(); } } void LoginDialog::on_pushButton_clicked() { login(); } void LoginDialog::on_pushButton_3_clicked() { sign_in signIn; signIn.show(); signIn.exec(); } void LoginDialog::on_pushButton_4_clicked() { QMessageBox::warning(this, "NOTICE", "Please enter your original password first"); modify_login modLog; modLog.exec(); }