Swift正则表达式--判断输入类型

最新推荐文章于 2025-02-03 07:21:06 发布

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#Swift #正则表达式 #判断输入类型 #Swift正则表达式

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本文介绍了一种使用Swift语言中的NSPredicate进行字符串验证的方法，包括验证中文字符、数字、大小写字母等不同类型的输入，适用于多种应用场景。

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//只能为中文
func onlyInputChineseCharacters(_ string: String) -> Bool {
var inputString = "[\u{4e00}-\u{9fa5}]+"
var predicate = NSPredicate(format: "SELF MATCHES %@", inputString)
var Chinese = predicate.evaluate(withObject: string)
return Chinese

}

//只能为数字
func onlyInputTheNumber(_ string: String) -> Bool {
var numString = "[0-9]*"
var predicate = NSPredicate(format: "SELF MATCHES %@", numString)
var number = predicate.evaluate(withObject: string)
return number
}

//只能为小写

func onlyInputLowercaseLetter(_ string: String) -> Bool {
var regex = "[a-z]*"
var predicate = NSPredicate(format: "SELF MATCHES %@", regex)
var letter = predicate.evaluate(withObject: string)
return letter
}

//只能为大写

func onlyInputACapital(_ string: String) -> Bool {
var regex = "[A-Z]*"
var predicate = NSPredicate(format: "SELF MATCHES %@", regex)
var capital = predicate.evaluate(withObject: string)
return capital

}

//允许大小写
func inputCapitalAndLowercaseLetter(_ string: String) -> Bool {
var regex = "[a-zA-Z]*"
var predicate = NSPredicate(format: "SELF MATCHES %@", regex)
var inputString = predicate.evaluate(withObject: string)
return inputString
}

//允许大小写或数字(不限字数)

func inputLettersOrNumbers(_ string: String) -> Bool {
var regex = "[a-zA-Z0-9]*"
var predicate = NSPredicate(format: "SELF MATCHES %@", regex)
var inputString = predicate.evaluate(withObject: string)
return inputString

}

//允许大小写或数字(限字数)
func inputNumberOrLetters(_ name: String) -> Bool {
var userNameRegex = "^[A-Za-z0-9]{6,20}+$"
var userNamePredicate = NSPredicate(format: "SELF MATCHES %@", userNameRegex)
var inputString = userNamePredicate.evaluate(withObject: name)
return inputString
}

//允许汉字，大小写或数字(限字数)
func inputChineseOrLettersNumberslimit(_ string: String) -> Bool {
var regex = "[\u{4e00}-\u{9fa5}]+[A-Za-z0-9]{6,20}+$"
var predicate = NSPredicate(format: "SELF MATCHES %@", regex)
var inputString = predicate.evaluate(withObject: string)
return inputString
}

//允许汉字或数字(不限字数)
func inputChineseOrNumbers(_ string: String) -> Bool {
var regex = "[\u{4e00}-\u{9fa5}]+[0-9]*"
var predicate = NSPredicate(format: "SELF MATCHES %@", regex)
var inputString = predicate.evaluate(withObject: string)
return inputString
}

//允许汉字或数字(限字数)
func inputChineseOrNumbersLimit(_ string: String) -> Bool {
var regex = "[\u{4e00}-\u{9fa5}][0-9]{6,20}+$"
var predicate = NSPredicate(format: "SELF MATCHES %@", regex)
var inputString = predicate.evaluate(withObject: string)
return inputString
}

//允许汉字，大小写或数字(不限字数)

func inputChineseOrLettersAndNumbersNum(_ string: String) -> Bool {
var regex = "[\u{4e00}-\u{9fa5}]+[A-Za-z0-9]*"
var predicate = NSPredicate(format: "SELF MATCHES %@", regex)
var inputString = predicate.evaluate(withObject: string)
return inputString

}