检查字符串是否至少包含swift中的upperCase字母，数字或特殊字符？ [英] Check if a string contains at least a upperCase letter, a digit, or a special character in Swift?

问题描述

我正在尝试创建一个方法，用于查找字符串是否包含数字，大写字母和使用正则表达式的特殊字符，如下所示

I am trying to create a method that finds whether a string contains a number , Upper case letter and a special character using regular expression as below

 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

    }

问题是以下正则表达式[AZ] +仅返回例如AVATAR的true，并为Avatar返回false。我希望我的正则表达式返回true，如果它在String中包含至少一个UpperCase。

The problem is the below regular expression [A-Z]+ returns true for only e.g AVATAR and returns false for Avatar. I want my regular expression return true if it contains at least one UpperCase in String.

推荐答案

只需替换您的RegEx规则[AZ] + with。* [AZ] +。*（以及其他RegEx规则）

Simply replace your RegEx rule [A-Z]+ with .*[A-Z]+.* (and other RegEx rules as well)

规则

[AZ] +仅匹配所有字符大写的字符串

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

示例：AVATAR，AVA，TAR，AAAAAA

无效：AVATAr

。*匹配所有字符串（0+个字符）

.* matches all strings (0+ characters)

示例：1,2，AVATAR，AVA ，TAR，a，b，c

。* [AZ] +。*匹配所有至少有一个资本的字符串信

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

示例：Avatar，avataR，aVatar

说明：

我。 。*将尝试匹配0或更多的任何东西

II。 [A-Z] +将需要至少一个大写字母（因为+）

III。 。*将尝试匹配0或更多的任何东西

I. .* will try to match 0 or more of anything
II. [A-Z]+ will require at least one capital letter (because of the +)
III. .* will try to match 0 or more of anything

Avatar [empty | A| vatar]

aVatar [a| V| atar]

aVAtar [a| VA| tar]

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

这篇关于检查字符串是否至少包含swift中的upperCase字母，数字或特殊字符？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！