如何删除字符串中的所有空格和\ n \ r？

Question

什么是去除斯威夫特字符串中的所有空间，\n和\r最有效的方法是什么？

我曾尝试：

for character in string.characters { 

} 

但它是一个有点不方便。

Answer 1

斯威夫特4：

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

输出：

print(test) // Thisisastring 

虽然法赫里的回答是不错的，我喜欢它是纯粹的雨燕;）

Answer 2

使用此：

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

输出： Thisismystring

Answer 3

您可以使用NSCharacterSetwhitespaceAndNewlineCharacterSet分手您的字符串，并使用joinWithSeparator()方法再次串连它如下：

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

您还可以扩展字符串，使其更容易让你在你的代码的任何地方使用它：

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

---

编辑/更新：

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" 

Answer 4

假设你有这样的字符串：“有些话这里\字nanother \ n \ r东西\ t和类似\ rmdjsbclsdcbsdilvb \ n \兰特最后这个:)”

这里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 

让我知道这对你的问题:)

Answer 5

斯威夫特4回应：

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

Answer 6

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" 

Answer 7

的SWIFT 4：

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