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January 11, 2017 16:50
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Swift3 で生年月日から現在の年齢を取得する ref: http://qiita.com/kawamurayuto/items/6297046603b6d088434e
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| let calendar = Calendar(identifier: .gregorian) | |
| let birthDate = DateComponents(calendar: calendar, year: 1983, month: 4, day: 15).date! | |
| let now = DateComponents(calendar: calendar, year: 2017, month: 1, day: 12).date! | |
| let age = calendar.dateComponents([.year], from: birthDate, to: now).year! | |
| age // -> ３３ |
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| let calendar = Calendar(identifier: .gregorian) | |
| let birthDate = DateComponents(calendar: calendar, year: 2016, month: 1, day: 12).date! | |
| let now = DateComponents(calendar: calendar, year: 2017, month: 1, day: 12).date! | |
| let elapsedComps = calendar.dateComponents([.year, .month, .day], from: birthDate, to: now) | |
| String(format: "生後%d年%dヶ月%d日", elapsedComps.year!, elapsedComps.month!, elapsedComps.day!) // -> 生後1年0ヶ月0日 |
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