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 tools> environment> system> terminal ). Change X-
Say less nonsense first:This game is purely the idea of the Earth Turtle, no use of any game engine.1. Fill the window with a button or Qlabel.2. Randomly dynamically set the background image of a button in a button matrix via a simple algorithm.3. Synchronization 2 process repeatedly set multiple button background to achieve the image to move, pay attention to adjust the refresh time.4. Override the button group mouse event, set the mouse to move into the time mark of the pattern, can be a smal
1. First connect the data cable and the printer to the computer.
2. Install the scanner, if you have a CD-ROM, directly installed on the CD, if there is no CD-ROM, you can download the scanner through the Samsung website. ( scan software please click here to download, Scan driver Please click here to download.) )3. After the installer completes, the Single-page document faces down on the document glass.
4. Open "Easy Document Creator" softw
default, the import statement does not use curly braces.importand export commands can only be on the top level of the module, not within the code block. Otherwise there will be a syntax error.Such a design can improve compiler efficiency, but there is no way to implement runtime loading.Because require is run-time loaded, the import command has no way to replace the Require dynamic load feature.So the import () function is introduced. completes the dynamic load.Import (specifier)The specifier i
hello.c)Add_executable (Hello ${src_list})It's OK to write set this way, but if you have a lot of source files, adding all the names of the source files will be a chore. A more convenient approach is to use the Aux_source_directory command, which looks for all the source files in the specified directory and then saves the results in the specified variable name. The syntax is as follows: Aux_source_directory (Aux_source_directory (. DIRSRCS)Add_executable (Hello ${dirsrcs})
Learn CMake Please re
Microsoft today pushed the fast-track insider members to WIN10 PC Creator Update Preview 14986, bringing a lot of new features, as well as some fixes and improvements. Unfortunately, there is no mobile version of the push today, Dona Sarkar said it was just pushed last week, so this week did not, estimated to wait until next week.
PC version 14986 new features:
Turn off the computer using voice commands and change the volume
Cortana love music
To create a PDF file of software Pdf24 creator yourself to install a printer called "Pdf24", you can use any other printer like this in Windows printers. When you print a file using Pdf24, a PDF file will be created automatically and an assistant will open.
You can combine multiple PDF files, split PDF format, extract from PDF, copy one or more from PDF pages to another page, such as titles and authors, encrypt PDFs, and prevent unauthorized p
1, download boost library, version optional, suggest the latest version
Address: http://sourceforge.net/projects/boost/files/boost/1.52.0/
2. Build Boost Library under Linux
Unzip the download good boost library;
Open the terminal, CD to boost library decompression directory, such as my:/home/you neme/boost_1_52_0
Execute command sudo./bootstrap.sh (Generate boost dedicated compilation tool here)
Execute command sudo./bjam Install
Wait for the installation to complete, will be in the/usr/local/i
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
3 ways: applyforce/impulse/velocity, all receive a B2VEC2 type vector parameter4 collision system differs from the physical engine: a former main function collision detection system, the latter powerful and complex5 Fixture R F: Unit 1, former = 0 inelastic = 1 full elastic collision The latter = 0 no friction = 1 strong friction;When calculating friction, it is necessary to combine 2 objects collider friction coefficient, and any one f=0 is not friction-–2018.1.6 "Jump jump" rigid body deforma
:
Start:function () {
var label = This.getcomponent (cc). Label);
if (label) {
label.string = "Hello";
}
else {
Cc.error ("Something wrong?");
}
}
get other nodes and their components
It is often not enough to access only the node's own components, and the script often needs to interact with multiple nodes. For example, a cannon that automatically targets the player needs to keep getting the player's latest position. Cocos
Modify C:\qt\qt5.4.0\tools\qtcreator\share\qtcreator\templates\wizards\plaincppapp\qmake\project.proc:\qt\qt5.4.0\ Tools\qtcreator\share\qtcreator\templates\wizards\plaincapp\qmake\project.pro Add two lines
CONFIG += c++11
QMAKE_CFLAGS += -std=c99
Other C:\Qt\Qt5.4.0\Tools\QtCreator\share\qtcreator\templates\wizards\The. Pro file below makes similar changes and should enable other projects to turn on C++11 and C99 support by default, which I have not tested.From for notes
Using JavaScript to get the URL of the current page is a complicated question, and if you think about it for the first time, many people are wondering what kind of javascript function it is.Actually, the function that JavaScript gets the URL of the current page is the window.location.href that we often use to redirect.For example, the following function:
If the URL of the current page is http://localhost:6666/myphp/mobile/pc1.php, then it runs as follows:The above function shows h
/5.7gcc_64/binDownload Fcitx-libs Source: https://pan.baidu.com/s/1nuS2emd, compilingCD Fcitx-qt5cmake. Makesudo make InstallWill encounter the following errorTo resolve the above error download EXTRA-CMAKE-MODULES_1.4.0.ORIG.TAR.XZ and unzip, https://pan.baidu.com/s/1skZL3Oh after decompression, enter the following command:CD Extra-cmake-modules-1.4.0cmake. Makesudo make InstallThe compiler will have the bottom-up error when you finish solving theResolve the above error needssudo apt-get instal
= "Com.yiibai.customer.services.CustomerService" > class= "Com.yiibai.aop.HijackAroundMethod"/> class= "Org.springframework.aop.support.NameMatchMethodYiibaicutAdvisor" > Beanclass= "Org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator" > XmlNow, you can get the bean by the original name of "CustomerService", if you know that the bean has been proxied.= (CustomerService)appContext.getBean("customerService");Java2. defaultadvisorautoproxycreator ExampleThis DefaultAdvisorAutoProxy
Unified Modeling Language
Composition of UML
Directory
I. Overview
Ii. emergence of standard modeling language UML
Iii. Content of the standard modeling language UML
Iv. Main features of the standard modeling language UML
V. application fields of standard mode
plantuml--Simple and fast UML editing software for EclipseIntroduction: in the application system software development process, if the software is composed of many objects, its structure is difficult to clarify by virtue of analysis, at the same time in order to facilitate the development and reuse of software, so in the development of the system before the modeling is very necessary, in a number of modeling methods to choose one to adapt to their own
Document directory
In the class diagram, draw the relationship between classes.
UML
UML is neither OOA/D nor a method. It is just a graphical representation. The purpose is to make people understand what you know.
Each graph is equivalent to an angle. Different graphs are used to observe the system from different angles.
For example, the traffic map and Administrative Area Chart observe China from
.
Design objects based on responsibilities.
The most critical software development tool is a thought that is trained with good design principles, rather than UML or still and other technologies.
The popular way to think about software object design and large components is to consider their responsibilities, roles, and writing. This is part of a large method called the responsibility-driven design (RDD).
Patterns are important, but on the other
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