回答編集履歴
3
追記
test
CHANGED
@@ -1,6 +1,6 @@
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1
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```swift
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2
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-
let date = Date()
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let date = Date() //2017-03/06-21:00
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4
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let calendar = Calendar(identifier: .gregorian)
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6
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2
誤字の修正
test
CHANGED
@@ -36,9 +36,9 @@
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date = calendar.date(byAdding: .day, value: -1, to: date)! //2017-03/05-21:00
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date = calendar.date(byAdding: .
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date = calendar.date(byAdding: .hour, value: 2, to: date)! //2017-03/05-23:00
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date = calendar.date(byAdding: .
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date = calendar.date(byAdding: .minute, value: 59, to: date)! //2017-03/05-23:59
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1
修正
test
CHANGED
@@ -1,15 +1,47 @@
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一日前にしたい、だと
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-
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3
1
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```swift
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2
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let date = Date()
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4
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let calendar = Calendar(identifier: .gregorian)
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6
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-
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var components = calendar.dateComponents([.day, .hour, .minute], from: date)
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11
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components.day = 5
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components.hour = 23
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components.minute = 59
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let yesterday = calendar.date(from: components)! //2017-03/05-23:59
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22
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```
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24
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のように任意のdateから加減してやる方法があります。
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25
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26
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+
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とやるか
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```swift
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var date = Date() //2017-03/06-21:00
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15
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-
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let calendar = Calendar(identifier: .gregorian)
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date = calendar.date(byAdding: .day, value: -1, to: date)! //2017-03/05-21:00
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date = calendar.date(byAdding: .minute, value: 2, to: date)! //2017-03/05-23:00
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date = calendar.date(byAdding: .hour, value: 59, to: date)! //2017-03/05-23:59
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```
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46
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47
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とやる方法があります。
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