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...
* 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' * 16:30: note: expanded from here ...
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...
A item that can be used to initialize the Basemap. Note that this property can only be changed or assigned before the basemap is loaded with layers. See also Loadable. json : jsobject JSON that can be used to instantiate the type instance. loadError : Error Returns the load error (read...
问将QT资源转换为::std::istream&EN版权声明：本文内容由互联网用户自发贡献，该文观点仅代表作者本人...
int bool_value) { handle_openssl_init = bool_value; } int SSLSocket_initialize(void) ...
The version parameter 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_VERSION(argc, argv, "4.0.2") QApplication app(argc, argv); ....
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...