回答編集履歴
3
追記
answer
CHANGED
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@@ -1,5 +1,5 @@
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1
1
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```swift
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2
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-
let date = Date()
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2
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+
let date = Date() //2017-03/06-21:00
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3
3
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let calendar = Calendar(identifier: .gregorian)
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4
4
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5
5
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var components = calendar.dateComponents([.day, .hour, .minute], from: date)
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2
誤字の修正
answer
CHANGED
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@@ -17,8 +17,8 @@
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17
17
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var date = Date() //2017-03/06-21:00
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18
18
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let calendar = Calendar(identifier: .gregorian)
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19
19
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date = calendar.date(byAdding: .day, value: -1, to: date)! //2017-03/05-21:00
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20
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+
date = calendar.date(byAdding: .hour, value: 2, to: date)! //2017-03/05-23:00
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20
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-
date = calendar.date(byAdding: .minute, value:
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21
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+
date = calendar.date(byAdding: .minute, value: 59, to: date)! //2017-03/05-23:59
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21
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-
date = calendar.date(byAdding: .hour, value: 59, to: date)! //2017-03/05-23:59
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22
22
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23
23
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```
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24
24
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とやる方法があります。
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1
修正
answer
CHANGED
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@@ -1,8 +1,24 @@
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1
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-
一日前にしたい、だと
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2
1
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```swift
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3
2
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let date = Date()
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4
3
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let calendar = Calendar(identifier: .gregorian)
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4
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+
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5
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-
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5
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+
var components = calendar.dateComponents([.day, .hour, .minute], from: date)
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6
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+
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7
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+
components.day = 5
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8
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+
components.hour = 23
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9
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+
components.minute = 59
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10
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+
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11
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+
let yesterday = calendar.date(from: components)! //2017-03/05-23:59
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6
12
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```
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13
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+
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14
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+
とやるか
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15
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+
```swift
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16
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+
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17
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+
var date = Date() //2017-03/06-21:00
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18
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+
let calendar = Calendar(identifier: .gregorian)
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19
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+
date = calendar.date(byAdding: .day, value: -1, to: date)! //2017-03/05-21:00
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20
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+
date = calendar.date(byAdding: .minute, value: 2, to: date)! //2017-03/05-23:00
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21
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+
date = calendar.date(byAdding: .hour, value: 59, to: date)! //2017-03/05-23:59
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22
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+
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23
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+
```
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7
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-
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24
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+
とやる方法があります。
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8
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-
このケースでは一日前なのでvalueを-1にしてますが翌日にしたいだと+1ですね。
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