QtCreator第4章伸缩因子的问题

seifguo

在mywigdet.cpp中，
downLayout->addWidget(fontComboBox, 1);
    downLayout->addWidget(pushButton, 1);
伸缩因子设为1，这样是说fontComboBox和pushButton的宽度是1:1么?
实际结果还是原来的样子，不是1:1的。怎样才能使fontComboBox和pushButton的宽度是1:1？
Qt5.5.1版本

main.cpp

1. #include "mywidget.h"
   
2. #include <QApplication>
   
3. 
   
4. int main(int argc, char *argv[])
   
5. {
   
6.     QApplication a(argc, argv);
   
7.     MyWidget w;
   
8.     w.show();
   
9. 
   
10.     return a.exec();
    
11. }

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mywidget.cpp

1. #include "mywidget.h"
   
2. 
   
3. #include <QFormLayout>
   
4. #include <QLineEdit>
   
5. #include <QComboBox>
   
6. #include <QSpinBox>
   
7. #include <QVBoxLayout>
   
8. #include <QHBoxLayout>
   
9. #include <QFontComboBox>
   
10. #include <QPushButton>
    
11. 
    
12. MyWidget::MyWidget(QWidget *parent)
    
13.     : QWidget(parent)
    
14. {
    
15.     QLineEdit *nameLineEdit = new QLineEdit;
    
16.     QComboBox ***ComboBox = new QComboBox;
    
17.     QSpinBox *ageSpinBox = new QSpinBox;
    
18.     QLineEdit *mailLineEdit = new QLineEdit;
    
19. 
    
20.     QFormLayout *layout = new QFormLayout;
    
21.     layout->addRow(tr("&Name:"), nameLineEdit);
    
22.     layout->addRow(tr("&**"), **ComboBox);
    
23.     layout->addRow(tr("&Age"), ageSpinBox);
    
24.     layout->addRow(tr("&Mail"), mailLineEdit);
    
25. 
    
26.     QFontComboBox *fontComboBox = new QFontComboBox;
    
27.     QPushButton *pushButton = new QPushButton("Push Button");
    
28. 
    
29.     QHBoxLayout *downLayout = new QHBoxLayout;
    
30.     downLayout->addWidget(fontComboBox, 1);
    
31.     downLayout->addWidget(pushButton, 1);
    
32. 
    
33.     QVBoxLayout *mainLayout = new QVBoxLayout;
    
34.     mainLayout->addLayout(layout);
    
35.     /*添加分隔符，高度设为50*/
    
36.     mainLayout->addSpacing(50);
    
37.     mainLayout->addLayout(downLayout);
    
38. 
    
39.     setLayout(mainLayout);
    
40. }

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mywidget.h

1. #ifndef MYWIDGET_H
   
2. #define MYWIDGET_H
   
3. 
   
4. #include <QWidget>
   
5. 
   
6. class MyWidget : public QWidget
   
7. {
   
8.     Q_OBJECT
   
9. 
   
10. public:
    
11.     MyWidget(QWidget *parent = 0);
    
12.     ~MyWidget();
    
13. };

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卢思杰

因为你new出来的ComboBox和button都是标准控件，换句话说他们的初始宽度可能就不一样，你拉伸因子设成一样他们还是不会等宽，你要么就把combobox的拉伸因子改小，要么将它resize成button试下