問題描述

我正在嘗試實現一個功能.我的代碼如下.

I am trying to implement a function. My code is given below.

當用戶單擊名稱為連接"的按鈕時，我想在字符串中獲取對象名稱為主機"的文本，例如主機".我怎樣才能做到這一點?我嘗試過，但失敗了.如何實現這個功能?

I want to get the text in lineedit with objectname 'host' in a string say 'shost' when the user clicks the pushbutton with name 'connect'. How can I do this? I tried and failed. How do I implement this function?

import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *


class Form(QDialog):
    def __init__(self, parent=None):
        super(Form, self).__init__(parent)

        le = QLineEdit()
        le.setObjectName("host")
        le.setText("Host")
        pb = QPushButton()
        pb.setObjectName("connect")
        pb.setText("Connect") 
        layout.addWidget(le)
        layout.addWidget(pb)
        self.setLayout(layout)

        self.connect(pb, SIGNAL("clicked()"),self.button_click)

        self.setWindowTitle("Learning")

    def button_click(self):
    #i want the text in lineedit with objectname 
    #'host' in a string say 'shost'. when the user click 
    # the pushbutton with name connect.How do i do it?
    # I tried and failed. How to implement this function?




app = QApplication(sys.argv)
form = Form()
form.show()
app.exec_()

現在如何實現button_click"功能?我剛剛開始使用 pyQt！

Now how do I implement the function "button_click" ? I have just started with pyQt!

推薦答案

我的第一個建議是使用 Qt Designer 來創建你的 GUI.自己打字很糟糕，需要更多時間，而且你肯定會比 Qt Designer 犯更多的錯誤.

My first suggestion is to use Qt Designer to create your GUIs. Typing them out yourself sucks, takes more time, and you will definitely make more mistakes than Qt Designer.

這里有一些 PyQt 教程 幫助您走上正軌.列表中的第一個是您應該開始的地方.

Here are some PyQt tutorials to help get you on the right track. The first one in the list is where you should start.

了解哪些方法可用于特定類的一個很好的指南是 PyQt4 類參考.在這種情況下，您將查找 QLineEdit 并看到有一個 text 方法.

A good guide for figuring out what methods are available for specific classes is the PyQt4 Class Reference. In this case, you would look up QLineEdit and see the there is a text method.

回答您的具體問題:

要使您的 GUI 元素可用于對象的其余部分，請在它們前面加上 self.

To make your GUI elements available to the rest of the object, preface them with self.

import sys
from PyQt4.QtCore import SIGNAL
from PyQt4.QtGui import QDialog, QApplication, QPushButton, QLineEdit, QFormLayout

class Form(QDialog):
    def __init__(self, parent=None):
        super(Form, self).__init__(parent)

        self.le = QLineEdit()
        self.le.setObjectName("host")
        self.le.setText("Host")
        
        self.pb = QPushButton()
        self.pb.setObjectName("connect")
        self.pb.setText("Connect") 
        
        layout = QFormLayout()
        layout.addWidget(self.le)
        layout.addWidget(self.pb)

        self.setLayout(layout)
        self.connect(self.pb, SIGNAL("clicked()"),self.button_click)
        self.setWindowTitle("Learning")

    def button_click(self):
        # shost is a QString object
        shost = self.le.text()
        print shost
        

app = QApplication(sys.argv)
form = Form()
form.show()
app.exec_()

這篇關于在字符串中按下 QpushButton 時如何在 QlineEdit 中獲取文本?的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！