发帖 回复
返回列表
  • 10938阅读
  • 4回复

Segmentation fault这个错误，跪求解，先谢谢各位了阿 [复制链接]

 上一主题 下一主题
离线baimingjiang
新手上路
 
只看楼主 倒序阅读 楼主  发表于: 2010-07-19
— 本帖被 XChinux 执行加亮操作(2010-10-22) —
程序是想使用Dict.cn的WebAPI写一个翻译小程序，使用QNetworkManagerGet请求，程序中当在wordLine按回车时请求，连接槽this->reply = netMan->get(QNetworkRequest(url));

在QNetworkManager的finished SIGNAL里处理请求返回的信息……

问题是，有时候很正常，当更多的时候会发生如下错误：
复制代码
  1. The inferior stopped because it received a signal from the Operating System.
  3. Signal name :
  4. SIGSEGV
  5. Signal meaning :
  6. Segmentation fault


大家帮忙看下下面代码，这个是什么情况阿，刚学不久，先谢谢各位了


代码；
dict.cpp文件
复制代码
  1. #include "dict.h"
  3. Dict::Dict(QWidget *parent)
  4.     : QWidget(parent)
  5. {
  6.     this->wordLabel = new QLabel(tr("Word:"));
  7.     this->wordLine = new QLineEdit;
  8.     this->resultLabel = new QLabel(tr("Result:"));
  9.     //this->resultView = new QWebView(this);
  10.     this->resultTextEdit = new QTextEdit;
  12.     mainLayout = new QGridLayout;
  13.     mainLayout->addWidget(this->wordLabel,0,0);
  14.     mainLayout->addWidget(this->wordLine,0,1);
  15.     mainLayout->addWidget(this->resultLabel,1,0,Qt::AlignTop);
  16.     mainLayout->addWidget(this->resultTextEdit,1,1);
  18.     this->setLayout(mainLayout);
  19.     this->setWindowTitle("Apple Dict");
  20.     //按enter键或改变内容发生
  21.     this->connect(this->wordLine,SIGNAL(textChanged(QString)),this,SLOT(changeWord()));
  22.     this->connect(this->wordLine,SIGNAL(returnPressed()),this,SLOT(enterWordLine()));
  24.     this->netMan = new QNetworkAccessManager(this);
  25.     this->connect(this->netMan,SIGNAL(finished(QNetworkReply*)),this,SLOT(httpFinished(QNetworkReply*)));
  26. }
  28. void Dict::enterWordLine(){
  29.     //this->resultView->load(QUrl("http://dict.cn/mini.php?q=word"));
  30.     //this->resultView->update();
  31.     QUrl url("http://dict.cn/ws.php?q=word");
  32.     this->reply = netMan->get(QNetworkRequest(url));
  33.     this->connect(this->reply,SIGNAL(readyRead()),this,SLOT(replyReadyRead()));
  34.     this->connect(this->reply,SIGNAL(finished()),this,SLOT(replyFinished()));
  35.     this->connect(this->reply,SIGNAL(error(QNetworkReply::NetworkError)),this,SLOT(replyError(QNetworkReply::NetworkError)));
  36. }
  37. void Dict::changeWord(){
  38.     //this->resultView->load(QUrl("http://www.baidu.com"));
  39.     //this->resultView->update();
  40. }
  42. void Dict::httpFinished(QNetworkReply *reply){
  43.     QVariant statusCodeV = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute);
  45.     if(statusCodeV.toInt() == 200){
  46.         QByteArray bytes = reply->readAll();
  47.         const QString string(bytes);
  49.         this->resultTextEdit->setText(string);
  50.     }
  51.     else{
  53.     }
  54.     delete reply;
  55. }
  57. void Dict::replyReadyRead(){
  59. }
  61. void Dict::replyFinished(){
  63. }
  65. void Dict::replyError(QNetworkReply::NetworkError replyError){
  67. }
  69. Dict::~Dict()
  70. {
  71.     delete this->wordLabel;
  72.     delete this->wordLine;
  73.     delete this->resultLabel;
  74.     delete this->resultTextEdit;
  75.     delete this->mainLayout;
  76.     delete this->myHttp;
  77.     delete this->netMan;
  78.     delete this->reply;
  79. }
回复
举报
分享到 淘江湖 新浪 QQ微博 QQ空间 开心 人人 豆瓣 网易微博 百度 鲜果 白社会 飞信
离线lexdene
新手上路
只看该作者 1楼 发表于: 2010-07-21
代码好长……
我很懒的说……
回复
举报
离线wd007
论坛版主
只看该作者 2楼 发表于: 2010-07-21
代码长。

编译没有问题吗？

调试一下看看
欢迎访问我的博客，一起学习提高
http://blog.csdn.net/qter_wd007
回复
举报
离线kongkong
新手上路
只看该作者 3楼 发表于: 2010-09-30
我在用QNetworkReply做下载的时候也碰到了segmentation fault， 不知道楼主解决了么。
回复
举报
离线steinlee
侠客
只看该作者 4楼 发表于: 2010-10-21
# Dict::~Dict()
# {
#     delete this->wordLabel;
#     delete this->wordLine;
#     delete this->resultLabel;
#     delete this->resultTextEdit;
#     delete this->mainLayout;
#     delete this->myHttp;
#     delete this->netMan;
#     delete this->reply;
# }

you can not delete these components because they are deleted by their parents
Looking for remote C/C++ and Qt 兼职
回复
举报
发帖 回复
返回列表
快速回复
限100 字节
 
上一个 下一个