1.MAINWINDOW.OBJ:-1:ERROR:LNK2019: unresolved external symbol "Public: __thiscall Qwtplot::qwtplot (class Qwidget *)" ([email protected] @[email protected]@@@z), the symbol in the function "Public:void __thiscall ui_mainwindow::setupui such an error:WORKAROUND: 1. Execute the Create---"Execution qmake2. Without adding the corresponding external library, the method of adding the library is to right-click within the project Pro file, select Add Library in the popup window, follow the instructions.
Today, qtcreator is installed in Ubuntu to test whether it can be used. As a result, a problem occurs during the test. After a simple compilation, F5 compilation appears in gnome-terminal. Cannot connect creator comm socket/tmp/qt_temp.u14973/stub-socket: no such file or directory So I checked that QT cannot be executed using gnome-terminal, and X-team is required. So I thought of the solution: Find tool
Let's go to the last figure Wow:
Figure 1, first pass view
Figure 2, Second pass view
Game Description:
(1). Only 20 red fruits can be cleared for each clearance
(2). Add new scene, appear in the second pass
(3). Increase the ready state of just-opened program, start by Space
(4). Increase the pause function, suspend the space by pressing the blanks in the program running, and continue the game by space.
(5). As long as you do not close the application, you will retain the number, that is, in
Previously, opencv was compiled on QT creator. Therefore, the camera information needs to be collected as required. Therefore, I collected some information on the Internet, followed the instructions of the gourd painting, and finally successfully collected the information.
Open qtcreator and create a widget project.
Put two labels on the interface to display the data and photos collected by the camera.
Th
Qt Creator and qtcreator
F1 view helpF2 jump to function definition (same effect as Ctrl + left mouse button)Shift + F2 declaration and definition SwitchingSwitch between F4 header file and source fileCtrl + 1 Welcome ModeCtrl + 2 edit modeCtrl + 3 debug modeCtrl + 4 Project Setting ModeCtrl + 5 help ModeCtrl + 6 Output ModeAlt + 0 show or hide the side bar. It works in editing mode (sometimes the function
Currently, most of our debugging scopes use Qdebug to output information for viewing, or CERR standard C + + output. In this article, we will show you using GDB to debug our scope.1) First create a basic scopeWe use our SDK to create one of the most basic scopes:This allows us to create a basic scope.2) Install Gdbsever for our mobile phoneFor some reason, our phone is not gdbserver. In order to debug, we need to install this software to be able to debug online. We start a terminal and type the
WIN10 1709 official ISO image download |WINDOWS10 1709 Autumn Creator Update official: 2017-10-18 14:27 Publisher: System City-XTCJH Views: 74458Win10 1709 (Build16299.19), which is Windwos Fall creators update (Autumn Creator update), is scheduled to be pushed to global users on October 17, and many Chinese users have received updates since the push was batched,
Today we share a full image of a WINDWOS10 creator.On the official website, we see a direct download installation, but we can't when there's no net.And in a lot of times when we download the installation of Windows10 back to encounter a lot of immeasurable problems, download failure, then again downloadThis is very troublesome, then we directly to the WINDOWS10 c
following parts: 1) QT Library: This is QT's repository, which is the core of QT. 2) qt Creator: A lightweight IDE based on QT Development, QT was introduced after Nokia acquisition, the latest version is 3.5.1, very useful
This article describes how to use HTTP to download files from a Web site. In QT network programming, protocol, or HTTP, is required. It is a Hypertext Transfer Protocol, which is a file transfer protocol. There is not much explanation for HTTP.In QT Network programming , protocol, or HTTP, is required. It is a Hypertext Transfer Protocol, which is a file transfer
Download and install QT/e-related software
1. Install QT/e.Installed on the local machine, including qt4.0.1 (Windows version) and QT/E2. 3. 7 (Linux version ).QT/e I installed in my virtual machine. Due to QT/e2.3.7 versions, it
Date: 2016.07.29--------------------------------------------In fact, there are many ways!My idea is to use it independently and not to unite vs.: HTTP://DOWNLOAD.QT.IO/OFFICIAL_RELEASES/QT/5.5/5.5.1/I chose to: Qt-opensource-windows-x86-mingw492-5.5.1.exe----Originally installed Qt creator independently, but do not kno
Baidu provides a query IP attribution to the open interface, when you enter an IP address in the search box to search, will open by the ip138 provided by the Baidu box application, you can directly enter the IP address within the box query. I looked at the page request and extracted an interface to query IP attribution, using Qt to write a simple IP attribution query application. Can be performed on a computer and on an Android phone. The Baidu API is
Baidu provides an open interface for querying ip address locations. When you enter an ip address in the search box to search, the Baidu box application provided by ip138 will be opened, you can directly enter the ip address in the box to query. I checked the page request, extracted the interface for querying ip addresses, and wrote a simple ip address retrieval query application using Qt. It can run on a computer or Android phone. Baidu API is used he
Resource Source: http://bbs.csdn.net/topics/390358737After I turn the finishing, some of the QT learning resources I collected to share to everyone, mainly for the novice, the veteran can directly ignore me. To illustrate, a lot of resources are under the VERYCD, we all know that VERYCD resources is difficult to download, although I still have the patience to download
For original blog reposted, contact the blogger!
This project has been hosted in my Git remote Library:Https://github.com/yue9944882/Snow
Project objectives
Major Functionality
Development Environment:CentOS7-Qt4
Implement a LINUX-based multi-thread download device with the following functions:
(HTTP only) multi-thread Remote resource download
(Pause/resume) resumable upload
Main technologies o
I do not know which version of the Thunderbolt, there is a "download speed histogram" of the small interface, I prefer (but the latest version of the Thunderbolt is not), so decided to cottage one. Of course, this cottage can not download files, hehe.Ideas:1: Paint the background of the interface black2: Generate a random number every 0.1 seconds and add them to a container3: Overload the PaintEvent functio
First, configure the QcustomplotOfficial: Http://www.qcustomplot.com/index.php/download650) this.width=650; "Src=" http://img.blog.csdn.net/20151010144651708?watermark/2/text/ Ahr0cdovl2jsb2cuy3nkbi5uzxqv/font/5a6l5l2t/fontsize/400/fill/i0jbqkfcma==/dissolve/70/gravity/southeast "style= "Border:none;"/>Unzip the file after downloading (do not have Chinese path)Open QT, create a new form projectCopy the header file Qcustomplot.h and source files from t
1, download "qt Voice", start installation.
2, after downloading, click Install, enter QT Voice Installation Wizard, click I have agreed.
3, choose the installation location, the default can be, if your disk is not enough, click Change.
4, click Next, is installed.
5, the installation is successful, the default immediately
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