QT 异常 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
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...
解决qtcreator工程文件例程报错error: cannot initialize object parameter of type ‘QWidget’ with an expression of type ‘MainWindow’ 在完成用虚拟机linux ubuntu进行交叉编译时候,qtcreator不正常运行 qt下载好并且环境配置完成,kits和qt都已配置完成在qt creator中,在终端手动编译qmake make都完全没问题,但是在...
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 ...
Generates a hash code for the current instance. (Inherited from NSObject) GetMethodForSelector(Selector) (Inherited from NSObject) GetNativeField(String) Obsolete. (Inherited from NSObject) GetNativeHash() (Inherited from NSObject) Init() (Inherited from NSObject) InitializeHandle(IntPtr...
thr, "QCoreApplication::sendEvent", qPrintable(QString::fromLatin1("Cannot send events to objects owned by a different thread. " "Current thread %1. Receiver '%2' was created in thread %3").arg( QDebug::toString(currentThread), QDebug::toString(receiver), QDebug::toString(thr))); Q...
Theargcandargvparameters are themain()function'sargcandargvparameters. Theversionparameter is a string literal that specifies which version of Qt the application requires (e.g., "4.0.2"). Example: #include <QApplication> #include <QMessageBox> int main(int argc, char *argv[]) { QT_REQUIRE...
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...
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If not set, the application version defaults to a platform-specific value determined from the main application executable or package (since Qt 5.9): PlatformSource Windows (classic desktop)PRODUCTVERSION parameter of the VERSIONINFO resource