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// ここから let start = dictionary["date"] as? String //20161215の文字列が渡ってきた場合 let year = start?.substring(to: (start?.index((start?.startIndex)!, offsetBy: 4))!) let manth = start?.substring(with: (start?.index((start?.startIndex)!, offsetBy: 4))!..<(start?.index((start?.startIndex)!, offsetBy: 6))!) let day = start?.substring(from: (start?.index((start?.endIndex)!, offsetBy: -2))!) |
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