PyQt5 输入对话框QInputDialog

本篇介绍 PyQt5 中 QInputDialog 类的四种对话框。

1）. 整数输入框

(int, bool ok) QInputDialog.getInt (QWidget parent, QString title, QString label, int value = 0, int min = -2147483647, int max = 2147483647, int step = 1, Qt.WindowFlags flags = 0)

参数有：父控件，标题，标签文本，初始值，最小值，最大值，微调框步长，窗口样式。

返回值：当前整数，是否确定

2）浮点数输入框

(float, bool ok) QInputDialog.getDouble (QWidget parent, QString title, QString label, float value = 0, float min = -2147483647, float max = 2147483647, int decimals = 1, Qt.WindowFlags flags = 0)

参数有：父控件，标题，标签文本，初始值，最小值，最大值，小数点后位数，窗口样式。

返回值：当前浮点数，是否确定

3）字符串输入框

(str, bool ok) QInputDialog.getText (QWidget parent, QString title, QString label,QLineEdit.EchoMode mode = QLineEdit.Normal,QString text = QString(), Qt.WindowFlags flags = 0)

参数有：父控件，标题，标签文本, 显示模式，初始字符串，窗口样式

其中显示模式有4种类型：

QLineEdit.Normal 正常模式，默认

QLineEdit.NoEcho 完全不显示输入内容，防止密码被偷窥，甚至连密码长度都隐藏

QLineEdit.Password 以星号显示所输入的字符

QLineEdit.PasswordEchoOnEdit 只在显示初始值或编辑完(QLineEdit失去焦点）后显示星号

返回值：当前字符串，是否确定

4）下拉列表对话框

(str, bool ok) InputDialog.getItem (QWidget parent, QString title, QString label, QStringList list, int current = 0, bool editable = True, Qt.WindowFlags flags = 0)

参数有：父控件，标题，标签文本，item字符串列表，初始索引，是否可编辑，窗口样式。

返回值：当前item字符串，是否确定

具体的运用可参考以下代码：

import sys from PyQt5.QtWidgets import QApplication, QWidget, QPushButton,QInputDialog,QVBoxLayout,QLineEdit

class App(QWidget):

def __init__(self): super().__init__() self.title = 'PyQt5 input dialogs' self.initUI()

def initUI(self): self.setWindowTitle(self.title) vlayout =QVBoxLayout() bt1 = QPushButton("整数输入框") bt2 = QPushButton("浮点数输入框") bt3 = QPushButton("字符串输入框") bt4 = QPushButton("下拉列表对话框") vlayout. addWidget(bt1) vlayout. addWidget(bt2) vlayout. addWidget(bt3) vlayout. addWidget(bt4) self.setLayout(vlayout) bt1.clicked.connect(self.getInteger) bt2.clicked.connect(self.getDouble) bt3.clicked.connect(self.getText) bt4.clicked.connect(self.getChoice)

self.resize(300,100)

def getInteger(self): i, okPressed = QInputDialog.getInt(self, "Get integer","输入整数:", 2, 0, 100, 1) if okPressed: print(i)

def getDouble(self): d, okPressed = QInputDialog.getDouble(self, "Get double","Value:", 10.50, 0, 100, 5) if okPressed: print( d)

def getText(self): text, okPressed = QInputDialog.getText(self, "Get text","Your name:", QLineEdit.PasswordEchoOnEdit, "initiaial text") if okPressed: print(text) print(type(text)) def getChoice(self): items = ["春","夏","秋","冬"] item, okPressed = QInputDialog.getItem(self, "Get item","季节:", items, 1, False) if okPressed : print(item)

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