PyQT5 输入对话框

Created: September-25, 2018

PyQt5 支持几个输入对话框，使用它们导入 QInputDialog。

from PyQt5.QtWidgets import QApplication, QWidget, QInputDialog, QLineEdit

PyQt5 输入对话框概述：

![PyQt5 输入对话框](/img/Tutorial/PyQt5/PyQt5 input dialog.png)

获取整数

使用 QInputDialog.getInt()获取整数 ：

def getInteger(self):
    i, okPressed = QInputDialog.getInt(self, "Get integer","Percentage:", 28, 0, 100, 1)
    if okPressed:
        print(i)

按顺序排列的参数：self，窗口标题，标签（输入框之前），默认值，最小值，最大值和步长。

获取双精度小数

使用 QInputDialog.getDouble() 获取双精度小数：

    def getDouble(self):
        d, okPressed = QInputDialog.getDouble(self, "Get double","Value:", 10.05, 0, 100, 10)
        if okPressed:
            print(d)

最后一个参数 10 是逗号后面的小数位数。

获取元素/选择

从下拉框中获取元素：

def getChoice(self):
    items = ("Red","Blue","Green")
    item, okPressed = QInputDialog.getItem(self, "Get item","Color:", items, 0, False)
    if okPressed and item:
        print(item)

获取字符串

字符串使用 QInputDialog.getText() 来获取。

def getText(self):
    text, okPressed = QInputDialog.getText(self, "Get text","Your name:", QLineEdit.Normal, "")
    if okPressed and text != '':
        print(text)

PyQt5 输入对话框举例

示例完整示例如下：

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QInputDialog, QLineEdit
from PyQt5.QtGui import QIcon

class App(QWidget):

    def __init__(self):
        super().__init__()
        self.title = 'PyQt5 input dialogs - tastones.com'
        self.left = 10
        self.top = 10
        self.width = 640
        self.height = 480
        self.initUI()

    def initUI(self):
        self.setWindowTitle(self.title)
        self.setGeometry(self.left, self.top, self.width, self.height)

        self.getInteger()
        self.getText()
        self.getDouble()
        self.getChoice()

        self.show()

    def getInteger(self):
        i, okPressed = QInputDialog.getInt(self, "Get integer","Percentage:", 28, 0, 100, 1)
        if okPressed:
            print(i)

    def getDouble(self):
        d, okPressed = QInputDialog.getDouble(self, "Get double","Value:", 10.50, 0, 100, 10)
        if okPressed:
            print( d)

    def getChoice(self):
        items = ("Red","Blue","Green")
        item, okPressed = QInputDialog.getItem(self, "Get item","Color:", items, 0, False)
        if ok and item:
            print(item)

    def getText(self):
        text, okPressed = QInputDialog.getText(self, "Get text","Your name:", QLineEdit.Normal, "")
        if okPressed and text != '':
            print(text)

if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = App()
    sys.exit(app.exec_())