如何删除字符串中的所有空格和\ n \ r？

What is the most efficient way to remove all the spaces, \n and \r in a String in Swift?

删除Swift中String中所有空格，\ n和\ r的最有效方法是什么？

I have tried:

我努力了：

for character in string.characters {

}

But it's a little inconvenient.

但这有点不方便。

7 个解决方案

#1

Swift 4:

斯威夫特4：

let text = "This \n is a st\tri\rng"
let test = String(text.filter { !" \n\t\r".contains($0) })

Output:

输出：

print(test) // Thisisastring

While Fahri's answer is nice, I prefer it to be pure Swift ;)

虽然Fahri的答案很好，但我更喜欢纯粹的Swift;）

#2

You can use NSCharacterSet whitespaceAndNewlineCharacterSet to break up your string and use joinWithSeparator() method to concatenate it back again as follow:

您可以使用NSCharacterSet whitespaceAndNewlineCharacterSet来分解您的字符串并使用joinWithSeparator（）方法将其重新连接回来，如下所示：

let textInput = "Line 1 \n Line 2 \n\r"
let whitespaceAndNewlineCharacterSet = NSCharacterSet.whitespaceAndNewlineCharacterSet()
let components = textInput.componentsSeparatedByCharactersInSet(whitespaceAndNewlineCharacterSet)
let result = components.joinWithSeparator("")   //"Line1Line2"

You can also extend String to make it easier for you to use it anywhere in your code:

您还可以扩展String以使您更容易在代码中的任何位置使用它：

extension String {
    var removingWhitespacesAndNewlines: String {
        return componentsSeparatedByCharactersInSet(NSCharacterSet.whitespaceAndNewlineCharacterSet()).joinWithSeparator("")
    }
}

---

edit/update:

编辑/更新：

Swift3 or later

Swift3或更高版本

let textInput = "Line 1 \n Line 2 \n\r"
let result = textInput.components(separatedBy: .whitespacesAndNewlines).joined()   //"Line1Line2"

---

extension String {
    var removingWhitespacesAndNewlines: String {
        return components(separatedBy: .whitespacesAndNewlines).joined()
    }
}

let textInput = "Line 1 \n Line 2 \n\r"
let result = textInput.removingWhitespacesAndNewlines   //"Line1Line2"

#3

For the sake of completeness this is the Regular Expression version

为了完整起见，这是正则表达式版本

let string = "What is the most efficient way to remove all the spaces and \n \r \tin a String in Swift"
let stringWithoutWhitespace = string.replacingOccurrences(of: "\\s", with: "", options: .regularExpression)
// -> "WhatisthemostefficientwaytoremoveallthespacesandinaStringinSwift"

#4

Suppose that you have this string : "some words \nanother word\n\r here something \tand something like \rmdjsbclsdcbsdilvb \n\rand finally this :)"

假设你有这个字符串：“有些单词\ nanother单词\ n \ r这里有东西\ t和类似\ rmdjsbclsdcbsdilvb \ n \ rand这样的东西:)”

here the how to remove all possible space :

这里有如何删除所有可能的空间：

let possibleWhiteSpace:NSArray = [" ","\t", "\n\r", "\n","\r"] //here you add other types of white space
    var string:NSString = "some words \nanother word\n\r here something \tand something like \rmdjsbclsdcbsdilvb \n\rand finally this :)"
    print(string)// initial string with white space
    possibleWhiteSpace.enumerateObjectsUsingBlock { (whiteSpace, idx, stop) -> Void in
        string = string.stringByReplacingOccurrencesOfString(whiteSpace as! String, withString: "")
    }
    print(string)//resulting string

Let me know if this respond to your question :)

如果这回应你的问题，请告诉我:)

#5

Use this:

用这个：

let aString: String = "This is my string"
let newString = aString.stringByReplacingOccurrencesOfString(" ", withString: "", options:[], range: nil)
print(newString)

Output : Thisismystring

输出：Thisismystring

#6

For Swift 4:

对于Swift 4：

let myString = "This \n is a st\tri\rng"
let trimmedString = myString.components(separatedBy: .whitespacesAndNewlines).joined()

#7

Swift 4:

斯威夫特4：

let text = "This \n is a st\tri\rng"
let cleanedText = text.filter { !" \n\t\r".characters.contains($0) }