Qt入门－QLineEdit::setInputMask()

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QLineEdit::setInputMask(const QString & inputMask)方法可以使Edit控件只允许输入自定义的格式字符串，inputMask参数设置格式化字符串的掩码。

inputMask可以是下列字符的组合

CharacterMeaningAASCII alphabetic character required. A-Z, a-z.aASCII alphabetic character permitted but not required.NASCII alphanumeric character required. A-Z, a-z, 0-9.nASCII alphanumeric character permitted but not required.XAny character required.xAny character permitted but not required.9ASCII digit required. 0-9.0ASCII digit permitted but not required.DASCII digit required. 1-9.dASCII digit permitted but not required (1-9).#ASCII digit or plus/minus sign permitted but not required.HHexadecimal character required. A-F, a-f, 0-9.hHexadecimal character permitted but not required.BBinary character required. 0-1.bBinary character permitted but not required.>All following alphabetic characters are uppercased.<All following alphabetic characters are lowercased.!Switch off case conversion.\Use \ to escape the special characters listed above to use them as separators.

示例：

“000.000.000.000;”是一个IP地址。

“HH:HH:HH:HH:HH:HH;0”是一个MAC地址。

“\\0\\xHHHH;0”是只允许输入一个16位的十六进制数。

另外，一个很有用的技巧是组合使用QLineEdit::setInputMask和QLineEdit::setValidator可实现更复杂的输入屏蔽和验证。