即使是新建工程例程都报错。 版本 qt 5.6.0 qt creator 4.11.0 报错 main.cpp:96: error: cannot initialize object parameter of type ‘QWidget’ with an expression of type ‘MainWindow’ main.cpp:89: error: no matching member function for call to ‘process’ 总之就是各种no matching和cannot ini...
error: cannot initialize a parameter of type 'QGraphicsScene *' with an lvalue of type 'xxxx *' 原因是 需要引入 头文件 #include
error: cannot initialize object parameter of type 'Ui_MainWindow' with an expression of type 'Ui::MainWindow'.解决办法:打开一下mainwindow.ui即可 Qt Ui界面中添加控件后改控件对象的名字需要回车确定 鼠标点其他地方等其他操作都不能确定,将会导致调用时无法识别该对象 Qt调用NI采集卡 要使用32位编译器 ...
This may only be set once to initialize the layer. referenceScale : double The reference scale for the layer (read-only). The reference scale of the layer is the scale at which a client should view the layer for the text to appear at its authored size. If the client changes the vie...
* main.cpp:7:1: error: cannot initialize a parameter of type 'const char *' with an rvalue of type 'int' * qtest.h:446:5: note: expanded from macro 'QTEST_MAIN' * qtest.h:364:74: note: expanded from macro 'QTEST_SET_MAIN_SOURCE_PATH' ...
SARibbonMainWindowalso supports rendering in normal mode. The second parameter of the SARibbonMainWindow constructor is used to set whether to use Ribbon mode: SARibbonMainWindow(QWidget *parent =nullptr,booluseRibbon =true); If the second parameter is set to false, it will use the normal me...
See setUrl() for more information on this parameter. QUrl::DecodedMode is not permitted in this context. See also toEncoded() and setUrl(). QUrl QUrl::fromLocalFile(const QString & localFile) [static] Returns a QUrl representation of localFile, interpreted as a local file. This function...
We create twoQLineEditobjects and define a single signal handler function. The connections use the same handler function, but the function will be invoked with a differentthisobject depending on which object's signal was triggered, so the output of the print() statement will be different for eac...
Initializing a String One way to initialize a QString is simply to pass a const char * to its constructor. For example, the following code creates a QString of size 5 containing the data "Hello": QString str = "Hello"; QString converts the const char * data into Unicode using the ...
QDockWidget::NoDockWidgetFeatures 0x00 The dock widget cannot be closed, moved, or floated. The DockWidgetFeatures type is a typedef for QFlags<DockWidgetFeature>. It stores an OR combination of DockWidgetFeature values.Property Documentation allowedAreas : Qt::DockWidgetAreas areas where the dock wi...