彈出警告框

Question

我有一個方法，檢查pyqt spinbox值是否已輸入，所需的值是1到18，因此我啓動的值爲0的spinbox，以便我可以輕鬆地指出其未被更改爲正確的號碼。我認爲，如果檢查發現它仍然是0用戶忘記設置它，並彈出一個警告，讓他們知道.. 我的問題是彈出窗口，用戶按下確定，彈出窗口關閉，但立即打開再次在用戶有時間設置正確的值之前......我如何彈出關閉並允許用戶在檢查0並再次彈出之前將時間更改爲正確的值（如果仍然不正確）

觸發group_check的信號最初觸發pickFile方法，直到我意識到代碼執行是否在Spinnerbox中設置了Group No，我試圖將檢查構建到pickFile方法中，但儘管它可能最好把它分開。

import sys 
import time 
from PyQt4 import QtGui, uic 
import xlrd 
import csv 
import os 
import re 

qtCreatorFile = "UI1.ui" # Enter file here. 
Ui_MainWindow, QtBaseClass = uic.loadUiType(qtCreatorFile) 


class MyApp(QtGui.QMainWindow, Ui_MainWindow):  
    group = '' 
    group_1 = '' 
    Var_1 = '' 
    Var_2 = '' 
    Var_3 = '' 
    error_string = '' 


    def __init__(self): 
     QtGui.QMainWindow.__init__(self) 
     Ui_MainWindow.__init__(self) 
     self.setupUi(self) 

     self.file_picker_button.clicked.connect(self.group_check) 
     self.radioButton_1.clicked.connect(self.onRadioButton1)  
     self.radioButton_2.clicked.connect(self.onRadioButton2)  
     self.radioButton_3.clicked.connect(self.onRadioButton3) 
     self.spinBox.valueChanged.connect(self.valuechange) 


    def group_check(self): 
     while True: 
      if self.spinBox.value() == 0: 
       error_string ='You must select your\nGroup No first ! ok ? ' 
       self.error_msg(error_string) 
      else: 
       self.pickFile() 

    def pickFile(self): 
     while True: 
      filename = QtGui.QFileDialog.getOpenFileName(self, 'Open File', '.') 
      if 'Monday' in filename: 
       break 
      elif 'Monday' not in filename or filename == '': 
       error_string ='Wrong file ? \nWant to try again ?' 
       self.error_msg1(error_string) 
      else: 
       self.filename = filename  
       x = first_file() 
       x.csv_from_excel(filename)   

    def onRadioButton1(self, group): 
     MyApp.Var_1 = 'PGDE SECONDARY ONLY' 
     MyApp.Var_2 = 'MA4 ONLY' 
     MyApp.Var_3 = 'PGDE' 


    def onRadioButton2(self, group): 
     MyApp.Var_1 = 'PGDE PRIMARY ONLY' 
     MyApp.Var_2 = 'MA4 ONLY' 
     MyApp.Var_3 = 'PGDE' 


    def onRadioButton3(self, group):  
     MyApp.Var_1 = 'PGDE PRIMARY ONLY' 
     MyApp.Var_2 = 'PGDE SECONDARY ONLY' 
     MyApp.Var_3 = 'MA4'   


    def valuechange(self, value): 
     MyApp.group_1 = ('Group '+ str(self.spinBox.value())) 
     if self.spinBox.value() >= 10: 
      MyApp.group = "1-9 ONLY" 
     if self.spinBox.value() >= 1 and self.spinBox.value() <= 9: 
      MyApp.group = "10-18 ONLY" 

    def error_msg(self, error_string): 
     choice = QtGui.QMessageBox.question(self, 'Error!', error_string) 

Answer 1

而不是使用while True只顯示錯誤消息並從函數返回。讓他們在修復錯誤後再次點擊該按鈕

def group_check(self): 
    if self.spinBox.value() == 0: 
     error_string ='You must select your\nGroup No first ! ok ? ' 
     self.error_msg(error_string) 
     return 
    self.pickFile()