PyQt5窗口间的数据传递
- 在发送端母窗口中定义pyqtSignal实例，并赋值，并调用pyqtSignal.emit函数发送参数。信号可以带任何形式的参数。
signal1 = pyqtSignal() # 无参数
signal2 = pyqtSignal(int) # 1个字符串参数
signal3 = pyqtSignal(int, str) # 2个不同类型参数，数字和字符串，
signal4 = pyqtSignal(list) # 列表
signal5 = pyqtSignal(dict) # 字典
# 可以重载的不同类型及不同个数的参数
signal6 = pyqtSignal([int, str], [str])
示例如下：
class Product_Read_Window(QMainWindow, Raws_database):
_send_list = pyqtSignal(list)
def __init__(self, parent=None):
super().__init__(parent)
self.setupUi(self)
self.row_num = 0
self._table_settings()
def on_ChooseButton_clicked(self):
choose_num = 0
choose_list = []
self.send_list = []
for i in range(self.row_num):
if self.Raws_chem_table.item(i, 0).checkState():
choose_num += 1
choose_list.append(i)
if (choose_num > 4)or(choose_num == 0):
dia_err_choose = Raw_content_err_Dialog()
dia_err_choose.err_msg.setText("选择的岩棉产品数量错误！")
dia_err_choose.exec_()
return 1
else:
for i in choose_list:
self.send_list.append(self.product_chem_list[i])
self._send_list.emit(self.send_list)
self.close()
- 在接收端窗口中，调用发送端窗口子类，并使用pyqtSignal.connect函数触发相应函数，并将参数传递给函数。发送子窗口一旦触发emit发送参数，将会触发接收端触self.product_input函数：
def on_Button_Pdt_Read_clicked(self):
self.dia_pdt_data = Product_Read_Window()
self.dia_pdt_data.show()
self.dia_pdt_data._send_list.connect(self.product_input)
def product_input(self, input_list):
chem_list = ['Name','Si','Al','Ca','Mg','Fe','Ti','Na','K','Mn']
for j in range(1, 4):
for i in chem_list:
eval('self.label_%s_%s.setText("")'%(i, j))
self.Pdt1_Emp = 1
self.Pdt2_Emp = 1
self.Pdt3_Emp = 1
self.Pdt4_Emp = 1
product_num = len(input_list)
for j in range(1, product_num+1):
for i, k in enumerate(chem_list, 1):
eval('self.label_%s_%s.setText("%s")'%(k, j,input_list[j-1][i]))
exec("self.Pdt%s_Emp=0"%j)
