问Qt错误:没有在这个作用域中声明QHBoxLayout？ENQt 像其他编辑器一样，在添加控件时，也可以自定义控件的坐标，让每个控件处于你希望的位置，但是这样相对麻烦，而 Qt 提供了一系列布局功能，本文介绍的就是水平布局 QHBoxLayout，他可以将一系列控件加入其布局中，然后将整个布局应用到窗口中。详见代码：
nativeEvent的参数类型变了。 #if(QT_VERSION >= QT_VERSION_CHECK(6,0,0))boolnativeEvent(constQByteArray &eventType,void*message, qintptr *result);#elseboolnativeEvent(constQByteArray &eventType,void*message,long*result);#endif QButtonGroup的buttonClicked信号中int参数的函数全部改名字叫idClicked。
C:\App\appname\traymenu.cpp:584: Error: invalid use of void expression QFuture<void> future = QtConcurrent::run(this, this->save(outputFilename)); ^ 我的标题看起来像:class Traymenu : public QSystemTrayIcon { Q_OBJECT public: Traymenu(QApplication *); ~Traymenu(); void save(); ...
问connect函数错误QT 5EN本文主要介绍Qt的connect接口 Qt4版本接口 sender为信号发送者； receiver为槽接收...
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对应报错函数应设置为静态类成员(如static void… \ static int…) Qt error: invalid use of member in static member function static型函数只能访问static型变量 以上两问题的解释[C++编译报错:invalid use of non-static member function - 知乎 (zhihu.com)](https://zhuanlan.zhihu.com/p/366654169) ...
-Waddress-of-array-temporary pointer is initialized by a temporary array, which will be destroyed at the end of the full-expression -Warc-maybe-repeated-use-of-weak "weak %select{variable|property|implicit property|instance variable}0 %1 may be accessed multiple times in this %select{function...
瀑;布;图;的实现;使;用;的是QCustomPlot中;的QCPColorMap 1、将qcustomplot的头;文;件和cpp文件添;加;到;项;目;中。 2、将qwidget提升为qcustomplot。我;把该;控;件命;名为heatMap 3、初始化QCPColorMap void Ba... 查看原文 QCustomPlot配置、使用...
void optimize() const QString pattern() const int patternErrorOffset() const QRegularExpression::PatternOptions patternOptions() const void setPattern(const QString &pattern) void setPatternOptions(QRegularExpression::PatternOptions options) void swap(QRegularExpression &other) bool operator!=(const ...
M127WarningExpression statements should be assignments, calls or delete expressions only M128ErrorA state cannot have the specified child item M201HintPlace var declarations at the start of a function M202HintUse only one statement per line