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
在Swift 4中将字符串拆分为数组的步骤。
赋值字符串基于@spling。
注意：variableName.components（separatedBy:“split关键字”）
let fullName: String = "First Last @ triggerd event of the session by session storage @ it can be divided by the event of the trigger."
let fullNameArr = fullName.components(separatedBy: "@")
print("split", fullNameArr)
其他回答
Swift的方法是使用全局拆分函数，如下所示：
var fullName = "First Last"
var fullNameArr = split(fullName) {$0 == " "}
var firstName: String = fullNameArr[0]
var lastName: String? = fullNameArr.count > 1 ? fullNameArr[1] : nil
使用Swift 2
在Swift 2中，由于引入了内部CharacterView类型，拆分的使用变得有点复杂。这意味着String不再采用SequenceType或CollectionType协议，您必须改为使用.characts属性来访问String实例的CharacterView类型表示。（注意：CharacterView确实采用SequenceType和CollectionType协议）。
let fullName = "First Last"
let fullNameArr = fullName.characters.split{$0 == " "}.map(String.init)
// or simply:
// let fullNameArr = fullName.characters.split{" "}.map(String.init)
fullNameArr[0] // First
fullNameArr[1] // Last
var fullName = "James Keagan Michael"
let first = fullName.components(separatedBy: " ").first?.isEmpty == false ? fullName.components(separatedBy: " ").first! : "John"
let last = fullName.components(separatedBy: " ").last?.isEmpty == false && fullName.components(separatedBy: " ").last != fullName.components(separatedBy: " ").first ? fullName.components(separatedBy: " ").last! : "Doe"
不允许使用相同的名字和姓氏如果全名无效，则取占位符值“John Doe”
我还没有找到能够处理3个或更多组件名称并支持较旧iOS版本的解决方案。
struct NameComponentsSplitter {
static func split(fullName: String) -> (String?, String?) {
guard !fullName.isEmpty else {
return (nil, nil)
}
let components = fullName.components(separatedBy: .whitespacesAndNewlines)
let lastName = components.last
let firstName = components.dropLast().joined(separator: " ")
return (firstName.isEmpty ? nil : firstName, lastName)
}
}
通过测试用例：
func testThatItHandlesTwoComponents() {
let (firstName, lastName) = NameComponentsSplitter.split(fullName: "John Smith")
XCTAssertEqual(firstName, "John")
XCTAssertEqual(lastName, "Smith")
}
func testThatItHandlesMoreThanTwoComponents() {
var (firstName, lastName) = NameComponentsSplitter.split(fullName: "John Clark Smith")
XCTAssertEqual(firstName, "John Clark")
XCTAssertEqual(lastName, "Smith")
(firstName, lastName) = NameComponentsSplitter.split(fullName: "John Clark Jr. Smith")
XCTAssertEqual(firstName, "John Clark Jr.")
XCTAssertEqual(lastName, "Smith")
}
func testThatItHandlesEmptyInput() {
let (firstName, lastName) = NameComponentsSplitter.split(fullName: "")
XCTAssertEqual(firstName, nil)
XCTAssertEqual(lastName, nil)
}
这是用于swift 4.2在20181206 1610的字符串和CSV文件
var dataArray : [[String]] = []
let path = Bundle.main.path(forResource: "csvfilename", ofType: "csv")
let url = URL(fileURLWithPath: path!)
do {
let data = try Data(contentsOf: url)
let content = String(data: data, encoding: .utf8)
let parsedCSV = content?.components(separatedBy: "\r\n").map{ $0.components(separatedBy: ";") }
for line in parsedCSV!
{
dataArray.append(line)
}
}
catch let jsonErr {
print("\n Error read CSV file: \n ", jsonErr)
}
print("\n MohNada 20181206 1610 - The final result is \(dataArray) \n ")
雨燕3
let line = "AAA BBB\t CCC"
let fields = line.components(separatedBy: .whitespaces).filter {!$0.isEmpty}
返回三个字符串AAA、BBB和CCC筛选出空字段处理多个空格和制表字符如果要处理新行，请将.whittespaces替换为.whittespace和新行
