QJSValueIterator Class▲
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Header: QJSValueIterator
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CMake:
find_package(Qt6 REQUIRED COMPONENTS Qml)
target_link_libraries(mytarget PRIVATE Qt6::Qml)
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qmake: QT += qml
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Group: QJSValueIterator is part of qtjavascript
Detailed Description▲
The QJSValueIterator constructor takes a QJSValue as argument. After construction, the iterator is located at the very beginning of the sequence of properties. Here's how to iterate over all the properties of a QJSValue:
QJSValue object;
...
QJSValueIterator it(object);
while (it.hasNext()) {
it.next();
qDebug() << it.name() << ": " << it.value().toString();
}The next() advances the iterator. The name() and value() functions return the name and value of the last item that was jumped over.
Note that QJSValueIterator only iterates over the QJSValue's own properties; i.e. it does not follow the prototype chain. You can use a loop like this to follow the prototype chain:
QJSValue obj = ...; // the object to iterate over
while (obj.isObject()) {
QJSValueIterator it(obj);
while (it.hasNext()) {
it.next();
qDebug() << it.name();
}
obj = obj.prototype();
}See Also▲
See also QJSValue::property()
Member Function Documentation▲
QJSValueIterator::QJSValueIterator(const QJSValue &object)▲
Constructs an iterator for traversing object. The iterator is set to be at the front of the sequence of properties (before the first property).
QJSValueIterator::~QJSValueIterator()▲
Destroys the iterator.
bool QJSValueIterator::hasNext() const▲
Returns true if there is at least one item ahead of the iterator (i.e. the iterator is not at the back of the property sequence); otherwise returns false.
See Also▲
See also next()
QString QJSValueIterator::name() const▲
bool QJSValueIterator::next()▲
Advances the iterator by one position. Returns true if there was at least one item ahead of the iterator (i.e. the iterator was not already at the back of the property sequence); otherwise returns false.
See Also▲
QJSValue QJSValueIterator::value() const▲
QJSValueIterator &QJSValueIterator::operator=(QJSValue &object)▲
Makes the iterator operate on object. The iterator is set to be at the front of the sequence of properties (before the first property).