pyqt5-下拉框联动效果
from PyQt5.Qt import *
class MyWindow(QWidget):
def __init__(self):
super().__init__()
self.setWindowTitle("")
self.resize(500,500)
#后期这个字典可以从数据库中传入
self.province = {
"安徽省":["3401",{
"合肥市":"340101",
"六安市":"340102",
"阜阳市":"340103",
"芜湖市":"340104",
"滁州市":"340105",
"宣城市":"340106",
"黄山市":"340107",
"亳州市":"340108",
}],
"江苏省": ["5201", {
"南京市": "520101",
"苏州市": "520102",
"无锡市": "520103",
"常州市": "520104",
"盐城市": "520105",
"扬州市": "520106",
}],
"湖北省": ["4201", {
"武汉市": "420101",
"鄂州市": "420102",
"荆门市": "420103",
"襄阳市": "420104",
"咸宁市": "420105",
"黄冈市": "420106",
}],
}
self.setup_ui()
def setup_ui(self):
#1.创建省下拉框,修改一些显示尺寸(这个可以自行调节)
qcb_pro = QComboBox(self)
qcb_pro.resize(80,25)
qcb_pro.move(100,100)
self.qcb_pro = qcb_pro
#3.创建市下拉选择框
qcb_city = QComboBox(self)
qcb_city.resize(80,25)
qcb_city.move(190,100)
self.qcb_city = qcb_city
# 4.为下拉框绑定触发事件,currentIndexChanged信号有两个方法,指定获取int的这个方法
qcb_pro.currentIndexChanged[int].connect(self.pro_changed)
qcb_city.currentIndexChanged[int].connect(self.city_change)
# 2.为省下拉框填充数据,可根据从数据库中检索出的数据,动态填充
for key, val in self.province.items():
qcb_pro.addItem(key, val[0])
def pro_changed(self,pro_idx):
#省下拉框改变,先清空市下拉框,然后添加市数据
self.qcb_city.clear()
for key,val in self.province[self.qcb_pro.currentText()][1].items():
self.qcb_city.addItem(key,val)
#同时获取省下拉框对应的data数据,这里只是简单打印
print(self.qcb_pro.itemData(pro_idx))
def city_change(self,city_idx):
#因为在省下拉框操作的时候,有一个clear方法执行,也会触发这个方法,但是由于被清空,传递过来的索引就是-1,就拿不到数据
if city_idx == -1:
pass
else:
# 同时获取市下拉框对应的data数据,这里只是简单打印
print(self.qcb_city.itemData(city_idx))
if __name__ == '__main__':
import sys
app = QApplication(sys.argv)
window = MyWindow()
window.show()
sys.exit(app.exec())