[Swift] String

출처

앱 12개를 만들며 배우는 Swift4 & iOS11 아이폰 iOS 개발 강좌

https://www.inflearn.com/course/swift4-%EC%8A%A4%EC%9C%84%ED%94%84%ED%8A%B8-ios-%EA%B0%9C%EB%B0%9C/dashboard

앱 12개를 만들며 배우는 Swift4 & iOS11 아이폰 iOS 개발 강좌 - 인프런

위치

iBooks > swift 5 검색

 

내용

• String Literals
  • let someString = "Input Some String"
• Multiline String Literals : """ """

let quotation = """
The White Rabbit put on his spectacles.  "Where shall I begin,
please your Majesty?" he asked.

"Begin at the beginning," the King said gravely, "and go on
till you come to the end; then stop."
""

 

• Escaped special characters
  • \n
  • \"
  • \r
  • 등등
• Empty String 할당하기
  • 방법1 ) var emptystring = ""
  • 방법2 ) var emptystring = String()
• Concatenating Strings & Characters
  • 방법1 ) var welcome = string1 + string2
  • 방법2 ) instruction += string2
• Counting Characters
  • print((변수명.count))

예제

import UIKit

// 여러 줄 출력하기
var str = "Hello, playground.\nNice to meet you \n\"I'm ddaengddaeng\""
print(str)

var str2 = """
Hello, playground.
Nice to meet you
\"I'm ddaengddaeng\"
"""
print(str2)

// empty string
var emptyString = ""
var anotherEmptyString = String()

if emptyString.isEmpty {
    print("Nothing to see here")
}

// concatenate
let string1 = "hello"
let string2 = " there"

var welcome = string1 + string2
print(welcome)

var instruction = "look over"
instruction += string2
print(instruction)

// count
print(instruction.count)