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String

概要

Stringは文字列を利用するためのクラスです。

関連クラス

NSString、NSMutableString

主要プロパティ

プロパティ名 説明 サンプル
isEmpty 空文字チェックをする string.isEmpty
characters.count 文字数を取得する string.count

主要メソッド

メソッド名 説明 サンプル
substring 文字列の一部を取得する string.substring(to: str.index(string.startIndex, offsetBy: 5)))
components 文字列を区切り文字で分割する string.components(separatedBy: ",")
replacingOccurrences 文字列を置換する string.replacingOccurrences(of: "♥", with: "")
hasPrefix 文字列のPrefixを調べる string.hasPrefix("stv")
range 文字列に該当の文字列が含まれるか調べる string.range(of: "stv")

フレームワーク

Foundation.framework

開発環境

Category Version
Swift 3.0.2
Xcode 8.2.1
iOS 10.0~

参考

https://developer.apple.com/reference/swift/string

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