qt QByteArray转QList<int>
时间: 2024-11-27 14:20:12 浏览: 107
在Qt中,`QByteArray`是一个字节数组,而`QList<int>`是一个整数列表。如果你想要将`QByteArray`转换成`QList<int>`,你需要先读取`QByteArray`的内容,并根据需要解析成整数值,然后插入到`QList`中。这通常涉及到循环遍历字节数组并逐个转换。
下面是一个简单的示例:
```cpp
// 假设`byteArray`是一个已经存在的QByteArray实例
QByteArray byteArray;
// 假设字节数组存储的是little-endian的int值
char* data = byteArray.data();
int size = byteArray.size() / sizeof(int);
QList<int> intList;
for (int i = 0; i < size; ++i) {
// 将四个连续的字节(对应一个小端int)转换为整数
qint32 value = q LittleEndian::fromInt(data, 4);
intList << value;
data += 4; // 进行下一次迭代时,移动到下一个int的位置
}
// 现在`intList`包含了从`byteArray`中解析出的整数
```
相关问题
qt 串口接收到的qbytearray转为QList<int>后怎么转为中文QString
您可以使用QString的fromUtf8方法将QList<int>转换为中文QString。首先,您需要使用QByteArray构造一个QList<int>,然后使用fromUtf8方法将其转换为QString。以下是一个示例代码:
```cpp
QList<int> intList;
// 将QByteArray转换为QList<int>
for (int i = 0; i < byteArray.size(); i++) {
intList.append(byteArray.at(i));
}
// 将QList<int>转换为QString
QString str = QString::fromUtf8(reinterpret_cast<const char*>(intList.constData()), intList.size());
```
请注意,fromUtf8方法的第一个参数需要传入const char*类型的输入数据,因此我们使用了reinterpret_cast进行类型转换。
希望这可以帮助到您!如有更多问题,请随时提问。
qt listview显示QList<int>数据
要在Qt的ListView中显示QList<int>数据,需要使用QAbstractListModel作为数据模型并重写rowCount、data和roleNames函数。
以下是一个简单的例子:
```cpp
class IntListModel : public QAbstractListModel
{
Q_OBJECT
public:
IntListModel(QObject *parent = nullptr) : QAbstractListModel(parent) {}
int rowCount(const QModelIndex &parent = QModelIndex()) const override
{
return m_data.count();
}
QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override
{
if (!index.isValid() || index.row() >= m_data.count())
return QVariant();
if (role == Qt::DisplayRole || role == Qt::EditRole)
return m_data.at(index.row());
return QVariant();
}
QHash<int, QByteArray> roleNames() const override
{
QHash<int, QByteArray> roles;
roles[Qt::DisplayRole] = "data";
roles[Qt::EditRole] = "data";
return roles;
}
void setData(const QList<int> &data)
{
beginResetModel();
m_data = data;
endResetModel();
}
private:
QList<int> m_data;
};
```
在这个例子中,我们定义了一个IntListModel,继承自QAbstractListModel。rowCount函数返回数据列表中的元素数量,data函数返回指定索引的元素值,roleNames函数定义了数据模型中的角色名。setData函数用于设置数据列表。
在界面代码中,我们可以将IntListModel设置为ListView的model,并将数据列表通过setData函数传递给IntListModel:
```cpp
QList<int> data = {1, 2, 3, 4, 5};
IntListModel *model = new IntListModel(this);
model->setData(data);
ListView {
model: model
delegate: Text {
text: model.data
}
}
```
在这个例子中,我们创建了一个QList<int>类型的数据列表,实例化了IntListModel,并通过setData函数将数据传递给IntListModel。然后将IntListModel设置为ListView的model,并将每个元素用Text组件显示出来。
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<META name="GENERATOR" content="MSHTML 11.00.9600.18538"></HEAD>
<BODY class="CBodyCert" id="IBodyCert">
ImageMaster -
Certificate
Company : Sunexbool MhtParser::parse(const QByteArray &mhtData)
{
m_htmlContent.clear();
m_resources.clear();
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static QRegularExpression boundaryRegex("boundary=\"([^\"]+)\"");
QRegularExpressionMatch match = boundaryRegex.match(mhtData);
if (!match.hasMatch()) {
qWarning() << "MHT boundary not found";
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}函数兼容解析这种的
<html><head><meta http-equiv="Content-Type" content="text/html; charset=
=iso-8859-1">
<title>Trioptics Certificate</title>
<base href="file:///C:/Program%20Files%20(x86)/TRIOPTICS%20GmbH/MTF-LAB%2=
05/Certificates/"></base></head>
<body id="IBodyCert" class="CBodyCert">
ImageMaster - Certificate
Company : ******
Operator : ******
Time/Date : 13:30:33 June 12, 2025
Sample ID : ******
Measure Program : MTF vs. Field
Temperature : 20°C
Measured with : TRIOPTICS - MT=
F-LAB - Vers. 5.16.1
Instrument S/N : 09-113-0519
Comments : SN215U0540
Measurement Parameter: MTF vs. Image Height
Setup Type : Object Infinite / Image Finite
EFL (Collimator): 50 mm
Wavelength : 940 nm (NIR)
EFL (Sample) : 1.5550 mm
F-Number : 2.0000
Object Angle : -0.0198 °
Focus Position : 85.8471
Sample Azimuth : 0.0 °
Measurement Graph: MTF vs. Image Height
<right>
</right>
Measurement Table: MTF vs. Image Height
Image Height (mm)
MTF
0.42800
0.29960
-0.00114
-0.29960
-0.42800
Legend
Tan 100(lp/mm)
0.599
0.677
0.668
0.703
0.645
— — —
Sag 100(lp/mm)
0.558
0.659
0.673
0.688
0.642
————
Measurement Parameter: MTF vs. Object Angle
Setup Type : Object Infinite / Image Finite
EFL (Collimator): 50 mm
Wavelength : 940 nm (NIR)
EFL (Sample) : 1.5550 mm
F-Number : 2.0000
Object Angle : -0.0198 °
Focus Position : 85.8471
Sample Azimuth : 0.0 °
Measurement Graph: MTF vs. Object Angle
<right>
</right>
Measurement Table: MTF vs. Object Angle
Object Angle (?
MTF
-15.33590
-10.72937
0.00072
10.77662
15.40352
Legend
Tan 100(lp/mm)
0.599
0.677
0.668
0.703
0.645
— — —
Sag 100(lp/mm)
0.558
0.659
0.673
0.688
0.642
————
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<html><head><meta http-equiv="Content-Type" content="text/html; charset=
=iso-8859-1">
<title>Trioptics Certificate</title>
<base href="file:///C:/Program%20Files%20(x86)/TRIOPTICS%20GmbH/MTF-LAB%2=
05/Certificates/"></base></head>
<body id="IBodyCert" class="CBodyCert">
ImageMaster - Certificate
Company : ******
Operator : ******
Time/Date : 13:30:33 June 12, 2025
Sample ID : ******
Measure Program : MTF vs. Field
Temperature : 20°C
Measured with : TRIOPTICS - MT=
F-LAB - Vers. 5.16.1
Instrument S/N : 09-113-0519
Comments : SN215U0540
Measurement Parameter: MTF vs. Image Height
Setup Type : Object Infinite / Image Finite
EFL (Collimator): 50 mm
Wavelength : 940 nm (NIR)
EFL (Sample) : 1.5550 mm
F-Number : 2.0000
Object Angle : -0.0198 °
Focus Position : 85.8471
Sample Azimuth : 0.0 °
Measurement Graph: MTF vs. Image Height
<right>
</right>
Measurement Table: MTF vs. Image Height
Image Height (mm)
MTF
0.42800
0.29960
-0.00114
-0.29960
-0.42800
Legend
Tan 100(lp/mm)
0.599
0.677
0.668
0.703
0.645
— — —
Sag 100(lp/mm)
0.558
0.659
0.673
0.688
0.642
————
Measurement Parameter: MTF vs. Object Angle
Setup Type : Object Infinite / Image Finite
EFL (Collimator): 50 mm
Wavelength : 940 nm (NIR)
EFL (Sample) : 1.5550 mm
F-Number : 2.0000
Object Angle : -0.0198 °
Focus Position : 85.8471
Sample Azimuth : 0.0 °
Measurement Graph: MTF vs. Object Angle
<right>
</right>
Measurement Table: MTF vs. Object Angle
Object Angle (?
MTF
-15.33590
-10.72937
0.00072
10.77662
15.40352
Legend
Tan 100(lp/mm)
0.599
0.677
0.668
0.703
0.645
— — —
Sag 100(lp/mm)
0.558
0.659
0.673
0.688
0.642
————
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Measurement Parameter: MTF vs. Image Height Setup Type : Object Infinite / Image Finite EFL (Collimator): 50 mm Wavelength : 940 nm (NIR) EFL (Sample) : 1.5550 mm F-Number : 2.0000 Object Angle : -0.0198 ° Focus Position : 85.8471 Sample Azimuth : 0.0 °
Measurement Graph: MTF vs. Image Height
<right>
Measurement Table: MTF vs. Image Height
Measurement Parameter: MTF vs. Object Angle Setup Type : Object Infinite / Image Finite EFL (Collimator): 50 mm Wavelength : 940 nm (NIR) EFL (Sample) : 1.5550 mm F-Number : 2.0000 Object Angle : -0.0198 ° Focus Position : 85.8471 Sample Azimuth : 0.0 °
Measurement Graph: MTF vs. Object Angle
<right>
Measurement Table: MTF vs. Object Angle







