检查一个字符串是否包含至少一个大写字母、一个数字或Swift中的一个特殊字符?

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

我正在尝试创建一个方法，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

    }

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.

问题是下面的正则表达式[A-Z]+仅对e返回true。《阿凡达》和《阿凡达》都是假的。如果正则表达式在字符串中包含至少一个大写字母，我希望它返回true。

3 个解决方案

#1

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

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

Rules

规则

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

+只匹配所有字符大写的字符串

Examples: AVATAR, AVA, TAR, AAAAAA
Won't work: AVATAr

阿凡达，艾娃，焦油，AAAAAA都不行:阿凡达

.* matches all strings (0+ characters)

.*匹配所有字符串(0+字符)

Examples: 1, 2, AVATAR, AVA, TAR, a, b, c

1、2、阿凡达、AVA、TAR、a、b、c

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

,*[a - z]+。*将所有字符串匹配为至少一个大写字母

Examples: Avatar, avataR, aVatar

例子:《阿凡达》,《阿凡达》,《阿凡达》

Explanation:

解释:

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

I. *将尝试匹配0或更多的任何II。[A-Z]+将需要至少一个大写字母(因为+).*将尝试匹配0或更多的任何东西

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

《阿凡达》(空|“A”|“vatar”)《阿凡达》(“A”|“V”|“阿塔尔”)《阿凡达》(“A”|“VA”|“焦油”)

Working Code

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

}

Examples:

例子:

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

#2

Here is a concise version of Joshuas answer in Swift 3, assuming that all validations must be fulfilled.

这里有一个简短版本的Joshuas回答在Swift 3，假设所有的验证必须完成。

func validate(password: String) -> Bool {
    let capitalLetterRegEx  = ".*[A-Z]+.*"
    let texttest = NSPredicate(format:"SELF MATCHES %@", capitalLetterRegEx)
    guard texttest.evaluate(with: password) else { return false }

    let numberRegEx  = ".*[0-9]+.*"
    let texttest1 = NSPredicate(format:"SELF MATCHES %@", numberRegEx)
    guard texttest1.evaluate(with: password) else { return false }

    let specialCharacterRegEx  = ".*[!&^%$#@()/_*+-]+.*"
    let texttest2 = NSPredicate(format:"SELF MATCHES %@", specialCharacterRegEx)
    guard texttest2.evaluate(with: password) else { return false }

    return true
}

#3

Another alternate solution.

另一个备选的解决方案。

You can do all the check using one regular expression.

您可以使用一个正则表达式来完成所有的检查。

RegExp: ^(?=.*[a-z])(?=.*[A-Z])(?=.*\\d)(?=.*[$@$!%*?&])[A-Za-z\\d$@$!%*?&]{8,}

You can use this as mention below:

你可以使用如下所述:

//Minimum 8 characters at least 1 Uppercase Alphabet, 1 Lowercase Alphabet, 1 Number and 1 Special Character:
let regex = "^(?=.*[a-z])(?=.*[A-Z])(?=.*\\d)(?=.*[$@$!%*?&])[A-Za-z\\d$@$!%*?&]{8,}"
let isMatched = NSPredicate(format:"SELF MATCHES %@", regex).evaluate(with: yourTextField.text)
if(isMatched  == true) {
    // Do your stuff ..
}  else {
    // Show Error Message.
}

#1