self.persons = self.persons.append({'name': 'peter', 'age': 22})
造成此问题的原因是append函数未返回任何内容，因此应将None分配给self.persons
要插入新数据，您必须调用beginInsertRows()并将endInsertRows()更改通知给视图。
def data(self, index, role=Qt.DisplayRole):
与rowCount方法相同：
def rowCount(self, parent=QModelIndex()):
我已经实现了addPerson，editPerson和deletePerson方法，分别从列表中添加，编辑和删除数据。另外，我在.qml中添加了必要的项目以进行测试。
from PyQt5.QtCore import QAbstractListModel, Qt, pyqtSignal, pyqtSlot, QModelIndex
class PersonModel(QAbstractListModel):
NameRole = Qt.UserRole + 1
AgeRole = Qt.UserRole + 2
personChanged = pyqtSignal()
def __init__(self, parent=None):
super().__init__(parent)
self.persons = [
{'name': 'jon', 'age': 20},
{'name': 'jane', 'age': 25}
]
def data(self, index, role=Qt.DisplayRole):
row = index.row()
if role == PersonModel.NameRole:
return self.persons[row]["name"]
if role == PersonModel.AgeRole:
return self.persons[row]["age"]
def rowCount(self, parent=QModelIndex()):
return len(self.persons)
def roleNames(self):
return {
PersonModel.NameRole: b'name',
PersonModel.AgeRole: b'age'
}
@pyqtSlot(str, int)
def addPerson(self, name, age):
self.beginInsertRows(QModelIndex(), self.rowCount(), self.rowCount())
self.persons.append({'name': name, 'age': age})
self.endInsertRows()
@pyqtSlot(int, str, int)
def editPerson(self, row, name, age):
ix = self.index(row, 0)
self.persons[row] = {'name': name, 'age': age}
self.dataChanged.emit(ix, ix, self.roleNames())
@pyqtSlot(int)
def deletePerson(self, row):
self.beginRemoveColumns(QModelIndex(), row, row)
del self.persons[row]
self.endRemoveRows()
import QtQuick 2.6
import QtQuick.Controls 2.2
Rectangle {
anchors.fill: parent
color: "lightgrey"
ListView {
id: listExample
anchors.fill: parent
model: PersonModel
delegate:
Item {
width: 200
height: 60
Row {
Text {
width: 60
text: name + " " + age
horizontalAlignment: Text.AlignHCenter
anchors.verticalCenter: parent.verticalCenter
}
Button{
width: 20
text: "+"
onClicked: PersonModel.editPerson(index, name, age+1)
}
Button{
width: 20
text: "-"
onClicked: PersonModel.editPerson(index, name, age-1)
}
Button{
width: 20
text: "X"
onClicked: PersonModel.deletePerson(index)
}
}
}
}
Button {
width: 50
height: 25
anchors.bottom: parent.bottom
anchors.right: parent.right
text: "add"
onClicked: {
console.log("qml adding")
PersonModel.addPerson("luis", 22)
}
}
}
编辑：
@pyqtSlot(int, str, int)
def insertPerson(self, row, name, age):
self.beginInsertRows(QModelIndex(), row, row)
self.persons.insert(row, {'name': name, 'age': age})
self.endInsertRows()
PersonModel.insertPerson(2, "luis", 1111)
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