我正在寻找一种方法来取代字符在一个Swift字符串。

示例:“This is my string”

我想用“+”替换“”以获得“This+is+my+string”。

我怎样才能做到这一点呢?


当前回答

var str = "This is my string"
str = str.replacingOccurrences(of: " ", with: "+")
print(str)

其他回答

Swift 3, Swift 4, Swift 5解决方案

let exampleString = "Example string"

//Solution suggested above in Swift 3.0
let stringToArray = exampleString.components(separatedBy: " ")
let stringFromArray = stringToArray.joined(separator: "+")

//Swiftiest solution
let swiftyString = exampleString.replacingOccurrences(of: " ", with: "+")

如果你不想使用Objective-C NSString方法,你可以使用split和join:

var string = "This is my string"
string = join("+", split(string, isSeparator: { $0 == " " }))

split(string, isSeparator:{$0 == " "})返回一个字符串数组(["This", "is", "my", "string"])。

join用一个+连接这些元素,产生所需的输出:"This+is+my+string"。

你可以测试这个:

let newString = test。stringByReplacingOccurrencesOfString(" ", withString: "+",选项:nil,范围:nil)

var str = "This is my string"
str = str.replacingOccurrences(of: " ", with: "+")
print(str)

修改现有可变字符串的类别:

extension String
{
    mutating func replace(originalString:String, withString newString:String)
    {
        let replacedString = self.stringByReplacingOccurrencesOfString(originalString, withString: newString, options: nil, range: nil)
        self = replacedString
    }
}

使用:

name.replace(" ", withString: "+")