PyQt5基本窗口控件-----QLineEdit
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QLineEdit类是一个单行文本控件，可输入单行字符串，可以设置回显模式(Echomode)和掩码模式
1. 回显模式(Echomode)
回显模式就是当键盘被按下后，显示了什么
- Normal 正常的回显模式
- NoEcho 不回显模式(什么都没出现)
- Password 密码
- PasswordEchoOnEdit 先是显示，然后过了几秒就不显示
import sys
from PyQt5.QtWidgets import *
class QLineEditEchoMode(QWidget):
def __init__(self):
super(QLineEditEchoMode, self).__init__()
self.initUI()
def initUI(self):
self.setWindowTitle('文本框的回显模式')
formLayout = QFormLayout()
normalLineEdit = QLineEdit()
noEchoLineEdit = QLineEdit()
passwordLineEdit = QLineEdit()
passwordEchoOnLineEdit = QLineEdit()
formLayout.addRow("Normal", normalLineEdit)
formLayout.addRow("noEcho", noEchoLineEdit)
formLayout.addRow("password", passwordLineEdit)
formLayout.addRow("passwordEchoOnEdit", passwordEchoOnLineEdit)
# placeoldertext 文本输入框内的灰色提示
normalLineEdit.setPlaceholderText("Normal")
noEchoLineEdit.setPlaceholderText("noEcho")
passwordLineEdit.setPlaceholderText("password")
passwordEchoOnLineEdit.setPlaceholderText("passwordEchoOnEdit")
normalLineEdit.setEchoMode(QLineEdit.Normal)
noEchoLineEdit.setEchoMode(QLineEdit.NoEcho)
passwordLineEdit.setEchoMode(QLineEdit.Password)
passwordEchoOnLineEdit.setEchoMode(QLineEdit.PasswordEchoOnEdit)
self.setLayout(formLayout)
if __name__ == '__main__':
app = QApplication(sys.argv)
main = QLineEditEchoMode()
main.show()
sys.exit(app.exec_())
2. 校验器
比如只能限制输入整数或满足一定条件的字符串
import sys
from PyQt5.QtWidgets import *
from PyQt5.QtGui import QIntValidator, QDoubleValidator, QRegExpValidator
from PyQt5.QtCore import QRegExp
class QLineEditValiddator(QWidget):
def __init__(self):
super(QLineEditValiddator, self).__init__()
self.initUI()
def initUI(self):
self.setWindowTitle('校验器')
# 创建表单布局
formLayout = QFormLayout()
intLineEdit = QLineEdit()
DoubleLineEdit = QLineEdit()
validatorLineEdit = QLineEdit()
formLayout.addRow('整数类型', intLineEdit)
formLayout.addRow('浮点类型', DoubleLineEdit)
formLayout.addRow('数字和字母类型', validatorLineEdit)
intLineEdit.setPlaceholderText('整形')
DoubleLineEdit.setPlaceholderText('浮点型')
validatorLineEdit.setPlaceholderText('字母和数字')
# 整数校验器
# 创建一个校验器
intValidator = QIntValidator(self)
# 设置范围
intValidator.setRange(1, 99)
# 浮点校验器
# 创建一个校验器
doubleValidator = QDoubleValidator(self)
# 设置范围
doubleValidator.setRange(-360, 360)
# 设置精度
doubleValidator.setNotation(QDoubleValidator.StandardNotation)
doubleValidator.setDecimals(2)
# 字符和数字校验器
reg = QRegExp('[a-zA-Z0-9]+$')
# 创建一个校验器
validator = QRegExpValidator(self)
validator.setRegExp(reg)
# 设置校验器
intLineEdit.setValidator(intValidator)
DoubleLineEdit.setValidator(doubleValidator)
validatorLineEdit.setValidator(validator)
self.setLayout(formLayout)
if __name__ == '__main__':
app = QApplication(sys.argv)
main = QLineEditValiddator()
main.show()
sys.exit(app.exec_())
3. 掩码
要限制用户的输入，除了刚刚的校验器外，还有掩码，比如在修改IP时，这个就是掩码
A ASCII字母字符是必须输入的(A-Z、a-z)
a ASCII字母字符是允许输入的,但不是必需的(A-Z、a-z)
N ASCII字母字符是必须输入的(A-Z、a-z、0-9)
n ASII字母字符是允许输入的,但不是必需的(A-Z、a-z、0-9)
X 任何字符都是必须输入的
x 任何字符都是允许输入的,但不是必需的
9 ASCII数字字符是必须输入的(0-9)
0 ASCII数字字符是允许输入的,但不是必需的(0-9)
D ASCII数字字符是必须输入的(1-9)
d ASCII数字字符是允许输入的,但不是必需的(1-9)
# ASCI数字字符或加减符号是允许输入的,但不是必需的
H 十六进制格式字符是必须输入的(A-F、a-f、0-9)
h 十六进制格式字符是允许输入的,但不是必需的(A-F、a-f、0-9)
B 二进制格式字符是必须输入的(0,1)
b 二进制格式字符是允许输入的,但不是必需的(0,1)
> 所有的字母字符都大写
< 所有的字母字符都小写
! 关闭大小写转换
\ 使用"\"转义上面列出的字符
import sys
from PyQt5.QtWidgets import *
class QLineEditMask(QWidget):
def __init__(self):
super(QLineEditMask, self).__init__()
self.initUI()
def initUI(self):
self.setWindowTitle('用掩码限制QLineEdit控件的输入')
formlayout = QFormLayout()
ipLineEdit = QLineEdit()
macLineEdit = QLineEdit()
dateLineEdit = QLineEdit()
licenseLineEdit = QLineEdit()
ipLineEdit.setInputMask('000.000.000.000;_') # 没有输入时就显示成下划线
macLineEdit.setInputMask('HH:HH:HH:HH:HH:HH;_')
dateLineEdit.setInputMask('0000-00-00')
licenseLineEdit.setInputMask('>AAAAA-AAAAA-AAAAA-AAAAA-AAAAA;#')
formlayout.addRow('数字掩码', ipLineEdit)
formlayout.addRow('Mac掩码', macLineEdit)
formlayout.addRow('日期掩码', dateLineEdit)
formlayout.addRow('许可证掩码', licenseLineEdit)
self.setLayout(formlayout)
if __name__ == '__main__':
app = QApplication(sys.argv)
main = QLineEditMask()
main.show()
sys.exit(app.exec_())
4. Demo
import sys
from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
from PyQt5.QtCore import Qt
class QLineEditDemo(QWidget):
def __init__(self):
super(QLineEditDemo, self).__init__()
self.initUI()
def initUI(self):
self.setWindowTitle('DEMO')
edit1 = QLineEdit()
# 使用int校验器
edit1.setValidator(QIntValidator())
# 设置最大长度，不超过4位的int
edit1.setMaxLength(4)
# 设置文本对齐格式
edit1.setAlignment(Qt.AlignRight)
# 设置字体和大小
edit1.setFont(QFont('Arial', 20))
# 设置浮点数校验
edit2 = QLineEdit()
edit2.setValidator(QDoubleValidator(0.99, 99.99, 2))
# 设置掩码
edit3 = QLineEdit()
edit3.setInputMask('99_9999_999999;#')
# 绑定信号槽，显示文本变化
edit4 = QLineEdit()
edit4.textChanged.connect(self.textChanged)
# 设置回显password
edit5 = QLineEdit()
edit5.setEchoMode(QLineEdit.Password)
edit5.editingFinished.connect(self.enterPress)
# 设为只读
edit6 = QLineEdit("hello pyqt5")
edit6.setReadOnly(True)
formlayout = QFormLayout()
formlayout.addRow('整形校验', edit1)
formlayout.addRow('浮点数校验', edit2)
formlayout.addRow('Input Mask校验', edit3)
formlayout.addRow('文本变化', edit4)
formlayout.addRow('密码', edit5)
formlayout.addRow('只读', edit6)
self.setLayout(formlayout)
def textChanged(self, text):
print("输出的内容" + text)
def enterPress(self):
print("已输入值")
if __name__ == '__main__':
app = QApplication(sys.argv)
main = QLineEditDemo()
main.show()
sys.exit(app.exec_())
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标签：__,控件,self,校验,PyQt5,addRow,QLineEdit,formlayout 来源： https://blog.csdn.net/weixin_44653585/article/details/104459519