假设我这里有一个字符串:
var fullName: String = "First Last"
我想在空白处拆分字符串,并将值分配给它们各自的变量
var fullNameArr = // something like: fullName.explode(" ")
var firstName: String = fullNameArr[0]
var lastName: String? = fullnameArr[1]
此外,有时用户可能没有姓氏。
假设我这里有一个字符串:
var fullName: String = "First Last"
我想在空白处拆分字符串,并将值分配给它们各自的变量
var fullNameArr = // something like: fullName.explode(" ")
var firstName: String = fullNameArr[0]
var lastName: String? = fullnameArr[1]
此外,有时用户可能没有姓氏。
当前回答
根据Swift 2.2
您只需编写2行代码,就会得到拆分字符串。
let fullName = "FirstName LastName"
var splitedFullName = fullName.componentsSeparatedByString(" ")
print(splitedFullName[0])
print(splitedFullName[1])
享受。:)
其他回答
大多数这些答案都假设输入包含一个空格,而不是空白,并且只有一个空格。如果你能安全地做出这样的假设,那么(来自bennett的)公认的答案是相当优雅的,也是我在可能的时候会采用的方法。
当我们无法做出这一假设时,一个更稳健的解决方案需要涵盖以下大多数答案没有考虑的情况:
制表符/换行符/空格(空白),包括重复出现的字符前导/尾随空格Apple/Linux(\n)和Windows(\r\n)换行符
为了涵盖这些情况,此解决方案使用正则表达式将所有空格(包括重复出现的字符和Windows换行符)转换为单个空格,然后修剪,然后拆分为单个空格:
斯威夫特3:
let searchInput = " First \r\n \n \t\t\tMiddle Last "
let searchTerms = searchInput
.replacingOccurrences(
of: "\\s+",
with: " ",
options: .regularExpression
)
.trimmingCharacters(in: .whitespaces)
.components(separatedBy: " ")
// searchTerms == ["First", "Middle", "Last"]
这在Beta 5中再次发生了变化。哭泣!它现在是CollectionType上的一个方法
旧版本:
var fullName = "First Last"
var fullNameArr = split(fullName) {$0 == " "}
新建:
var fullName = "First Last"
var fullNameArr = fullName.split {$0 == " "}
苹果发行说明
根据Swift 2.2
您只需编写2行代码,就会得到拆分字符串。
let fullName = "FirstName LastName"
var splitedFullName = fullName.componentsSeparatedByString(" ")
print(splitedFullName[0])
print(splitedFullName[1])
享受。:)
Swift 5.2的更新和最简单的方式
let paragraph = "Bob hit a ball, the hit BALL flew far after it was hit. Hello! Hie, How r u?"
let words = paragraph.components(separatedBy: [",", " ", "!",".","?"])
这张照片,
[“Bob”,“hit”,“a”,“ball”,“the”,“击球”,“ball”,“fly”,“far”,“after”,“it”,“was”,“hit”,“Hello”,“Hie”,“How”,“u”,“”]
但是,如果要过滤空字符串,
let words = paragraph.components(separatedBy: [",", " ", "!",".","?"]).filter({!$0.isEmpty})
输出
[“Bob”,“hit”,“a”,“ball”,“the”,“命中”,“ball”,“fly”,“far”,“after”,“it”,“was”,“hit”,“Hello”,”Hie“,”How“,”r“,”u“]
但请确保,Foundation已导入。
Xcode 8.0/Swift 3
let fullName = "First Last"
var fullNameArr = fullName.components(separatedBy: " ")
var firstname = fullNameArr[0] // First
var lastname = fullNameArr[1] // Last
漫长的道路:
var fullName: String = "First Last"
fullName += " " // this will help to see the last word
var newElement = "" //Empty String
var fullNameArr = [String]() //Empty Array
for Character in fullName.characters {
if Character == " " {
fullNameArr.append(newElement)
newElement = ""
} else {
newElement += "\(Character)"
}
}
var firsName = fullNameArr[0] // First
var lastName = fullNameArr[1] // Last