ios - 在 Swift 中检查字符串是否至少包含大写字母、数字或特殊字符？

Question

我正在尝试创建一种方法，使用正则表达式查找字符串是否包含数字、大写字母和特殊字符，如下所示

 func checkTextSufficientComplexity(var text : String) -> Bool{


            let capitalLetterRegEx  = "[A-Z]+"
            var texttest = NSPredicate(format:"SELF MATCHES %@", capitalLetterRegEx)
            var capitalresult = texttest.evaluateWithObject("AniP")
            println("\(capitalresult)")


            let numberRegEx  = "[0-9]+"
            var texttest1 = NSPredicate(format:"SELF MATCHES %@", numberRegEx)
            var numberresult = texttest1.evaluateWithObject(text)
            println("\(numberresult)")


            let specialCharacterRegEx  = "[.*&^%$#@()/]+"
            var texttest2 = NSPredicate(format:"SELF MATCHES %@", numberRegEx)

            var specialresult = texttest2.evaluateWithObject(text)
            println("\(specialresult)")

           return capitalresult && numberresult && specialresult

    }

问题是下面的正则表达式 [A-Z]+ 仅对 AVATAR 返回 true，对 Avatar 返回 false。我希望我的正则表达式在字符串中至少包含一个大写字母时返回 true。

Answer 1

只需将您的 RegEx 规则 [A-Z]+ 替换为 .*[A-Z]+.*(以及其他 RegEx 规则)

规则

[A-Z]+ matches only strings with all characters capitalized

示例:AVATAR、AVA、TAR、AAAAAA
不会工作:AVATAr

.* matches all strings (0+ characters)

示例:1、2、AVATAR、AVA、TAR、a、b、c

.*[A-Z]+.* matches all strings with at least one capital letter

示例:头像、avataR、aVatar

解释:

我。 .* 将尝试匹配 0 或更多的任何东西
二。 [A-Z]+ 将需要至少一个大写字母(因为 +)
三、 .* 将尝试匹配 0 个或多个

Avatar [empty | "A" | "vatar"]
aVatar ["a" | "V" | "atar"]
aVAtar ["a" | "VA" | "tar"]

工作代码

func checkTextSufficientComplexity(var text : String) -> Bool{


    let capitalLetterRegEx  = ".*[A-Z]+.*"
    var texttest = NSPredicate(format:"SELF MATCHES %@", capitalLetterRegEx)
    var capitalresult = texttest!.evaluateWithObject(text)
    println("\(capitalresult)")


    let numberRegEx  = ".*[0-9]+.*"
    var texttest1 = NSPredicate(format:"SELF MATCHES %@", numberRegEx)
    var numberresult = texttest1!.evaluateWithObject(text)
    println("\(numberresult)")


    let specialCharacterRegEx  = ".*[!&^%$#@()/]+.*"
    var texttest2 = NSPredicate(format:"SELF MATCHES %@", specialCharacterRegEx)

    var specialresult = texttest2!.evaluateWithObject(text)
    println("\(specialresult)")

    return capitalresult || numberresult || specialresult

}

示例:

checkTextSufficientComplexity("Avatar") // true || false || false
checkTextSufficientComplexity("avatar") // false || false || false
checkTextSufficientComplexity("avatar1") // false || true || false
checkTextSufficientComplexity("avatar!") // false || false || true