QLineEdit类是一个单行文本框控件；
常用方法：
定义输入掩码的字符，如下列出了输入掩码的占位符和字面字符：
掩码实例如下；
常见信号：
例如：
#QLineEdit控件使用 import sys from PyQt5.QtWidgets import QPushButton,QApplication,QMainWindow,QLineEdit,QFormLayout,QWidget,QLabel class QLineEditDemo(QWidget): def __init__(self,parent=None): super(QLineEditDemo,self).__init__(parent) self.setWindowTitle("QLineEdit控件使用") self.resize(500,400) self.formLayout=QFormLayout() edit_username=QLineEdit() edit_username.setPlaceholderText("请输入用户名！") #设置获取焦点 edit_username.setFocus() edit_pwd=QLineEdit() edit_pwd.setPlaceholderText("请输入密码！") #设置显示效果 edit_username.setEchoMode(QLineEdit.Normal) edit_pwd.setEchoMode(QLineEdit.Password)#QLineEdit.PasswordEchoOnEdit,QLineEdit.Password,QLineEdit.NoEcho self.formLayout.addRow("UserName",edit_username) self.formLayout.addRow("PWD",edit_pwd) self.setLayout(self.formLayout) if __name__=="__main__": app=QApplication(sys.argv) win=QLineEditDemo() win.show() sys.exit(app.exec_())
添加格式校验：
例如：
1 #QLineEdit控件使用 2 import sys 3 from PyQt5.QtWidgets import QPushButton,QApplication,QMainWindow,QLineEdit,QFormLayout,QWidget,QLabel 4 from PyQt5.QtGui import QIntValidator,QDoubleValidator,QRegExpValidator 5 from PyQt5.QtCore import QRegExp 6 class QLineEditDemo(QWidget): 7 def __init__(self,parent=None): 8 super(QLineEditDemo,self).__init__(parent) 9 10 self.setWindowTitle("QLineEdit控件使用格式校验") 11 self.resize(500,600) 12 self.formLayout=QFormLayout() 13 14 edit_int=QLineEdit() 15 edit_int.setPlaceholderText("请输入整数！") 16 #设置获取焦点 17 edit_int.setFocus() 18 19 edit_float=QLineEdit() 20 edit_float.setPlaceholderText("请输入浮点数！") 21 22 edit_chars= QLineEdit() 23 edit_chars.setPlaceholderText("请输入指定格式字符！") 24 25 26 self.formLayout.addRow("整数",edit_int) 27 self.formLayout.addRow("浮点型",edit_float) 28 self.formLayout.addRow("指定格式字符串", edit_chars) 29 #格式校验 30 intValidator=QIntValidator(self) 31 intValidator.setRange(1,200) 32 33 doubleValidator=QDoubleValidator(self) 34 doubleValidator.setRange(-300,300) 35 doubleValidator.setNotation(QDoubleValidator.StandardNotation) 36 doubleValidator.setDecimals(2) 37 38 reg=QRegExp("[a-zA-Z]{6,8}") 39 cValidator=QRegExpValidator(self) 40 cValidator.setRegExp(reg) 41 42 edit_int.setValidator(intValidator) 43 edit_float.setValidator(doubleValidator) 44 edit_chars.setValidator(cValidator) 45 46 self.setLayout(self.formLayout) 47 48 49 50 if __name__=="__main__": 51 app=QApplication(sys.argv) 52 win=QLineEditDemo() 53 win.show() 54 sys.exit(app.exec_())
例如：IP、mac地址、日期等校验
1 #QLineEdit格式校验 2 #QLineEdit控件使用 3 import sys 4 from PyQt5.QtWidgets import QPushButton,QApplication,QMainWindow,QLineEdit,QFormLayout,QWidget,QLabel 5 from PyQt5.QtGui import QIntValidator,QDoubleValidator,QRegExpValidator 6 from PyQt5.QtCore import QRegExp 7 class QLineEditDemo(QWidget): 8 def __init__(self,parent=None): 9 super(QLineEditDemo,self).__init__(parent) 10 11 self.setWindowTitle("QLineEdit控件使用格式校验") 12 self.resize(500,600) 13 self.formLayout=QFormLayout() 14 15 edit_num=QLineEdit() 16 edit_num.setPlaceholderText("数字掩码！") 17 #设置获取焦点 18 edit_num.setFocus() 19 20 edit_mac=QLineEdit() 21 edit_mac.setPlaceholderText("mac掩码！") 22 23 edit_date= QLineEdit() 24 edit_date.setPlaceholderText("日期掩码！") 25 26 edit_str = QLineEdit() 27 edit_str.setPlaceholderText("许可证掩码！") 28 29 30 self.formLayout.addRow("数字掩码",edit_num) 31 self.formLayout.addRow("mac掩码",edit_mac) 32 self.formLayout.addRow("日期掩码", edit_date) 33 self.formLayout.addRow("许可证掩码", edit_str) 34 #格式校验 35 edit_num.setInputMask("000.000.000;_") 36 edit_mac.setInputMask("HH:HH:HH:HH:HH:HH;_") 37 edit_date.setInputMask("0000-00-00") 38 edit_str.setInputMask(">AAAAA-AAAAA-AAAAA-AAAAA-AAAAA;#") 39 40 self.setLayout(self.formLayout) 41 42 43 44 if __name__=="__main__": 45 app=QApplication(sys.argv) 46 win=QLineEditDemo() 47 win.show() 48 sys.exit(app.exec_())
综合实例：例如
1 #QLineEdit格式校验 2 #QLineEdit控件使用 3 import sys 4 from PyQt5.QtWidgets import QPushButton,QApplication,QMainWindow,QLineEdit,QFormLayout,QWidget,QLabel 5 from PyQt5.QtGui import QIntValidator,QDoubleValidator,QRegExpValidator,QFont 6 from PyQt5.QtCore import QRegExp,Qt 7 class QLineEditDemo(QWidget): 8 def __init__(self,parent=None): 9 super(QLineEditDemo,self).__init__(parent) 10 11 self.setWindowTitle("QLineEdit控件使用格式校验") 12 self.resize(500,600) 13 self.formLayout=QFormLayout() 14 15 edit_username = QLineEdit() 16 edit_username.setPlaceholderText("请输入用户名！") 17 # 设置获取焦点 18 edit_username.setFocus() 19 #设置字体 20 edit_username.setFont(QFont("微软雅黑",20)) 21 edit_username.setAlignment(Qt.AlignRight)#靠右侧对齐 22 23 edit_pwd = QLineEdit() 24 edit_pwd.setPlaceholderText("请输入密码！") 25 edit_pwd.editingFinished.connect(self.enterPress) 26 27 28 edit_sal = QLineEdit() 29 edit_sal.setPlaceholderText("请输入金额！") 30 edit_sal.textChanged.connect(self.getText) 31 32 edit_phone=QLineEdit() 33 edit_phone.setPlaceholderText("Phone-Number") 34 35 edit_readOnly= QLineEdit() 36 edit_readOnly.setText("190123") 37 edit_readOnly.setReadOnly(True)#设置只读模式 38 39 # 设置显示效果 40 edit_username.setEchoMode(QLineEdit.Normal) 41 edit_pwd.setEchoMode(QLineEdit.Password) # QLineEdit.PasswordEchoOnEdit,QLineEdit.Password,QLineEdit.NoEcho 42 edit_sal.setValidator(QDoubleValidator(0.99,99.99,2)) #限制输入小数点后两位 43 edit_phone.setInputMask("+99_9999_99999999") 44 45 self.formLayout.addRow("UserName", edit_username) 46 self.formLayout.addRow("PWD", edit_pwd) 47 self.formLayout.addRow("Sal", edit_sal) 48 self.formLayout.addRow("Phone-Number", edit_phone) 49 self.setLayout(self.formLayout) 50 51 52 def getText(self,text): 53 print("输入的值为："+text) 54 55 def enterPress(self): 56 print("已经输入内容") 57 58 59 if __name__=="__main__": 60 app=QApplication(sys.argv) 61 win=QLineEditDemo() 62 win.show() 63 sys.exit(app.exec_())
