Question

我正在制作一个应用程序，需要根据他们的生日找到某人的年龄。我有一个简单的NSDate，但我如何通过NSDateFormatter找到它？

Answer 1

- (NSInteger)ageFromBirthday:(NSDate *)birthdate {
    NSDate *today = [NSDate date];
    NSDateComponents *ageComponents = [[NSCalendar currentCalendar]
                                       components:NSCalendarUnitYear
                                       fromDate:birthdate
                                       toDate:today
                                       options:0];
    return ageComponents.year;
}

NSDateFormatter用于格式化日期（呃！）。根据经验，只要您需要对NSDate执行某些计算，就可以使用NSCalendar及相关类，例如NSDateComponents。

Answer 2

NSYearCalendarUnit 已弃用。它被 NSCalendarUnitYear

取代

- (NSString *) ageFromBirthDate:(NSString *)birthDate{
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"dd-MM-yyyy"];
    NSDate *myDate = [dateFormatter dateFromString: birthDate];

    return [NSString stringWithFormat:@"%d ans", [[[NSCalendar currentCalendar] components:NSCalendarUnitYear fromDate:myDate toDate:[NSDate date] options:0] year]];
}

Answer 3

如果你只是想知道某个人的年龄，我找到了一个较短的方法去做你想要完成的事情。

- (NSInteger)ageFromBirthday:(NSDate *)birthdate {
    NSDate *today = [NSDate date];
    NSInteger ageOfPerson = today.year - birthdate.year;
    return ageofPerson;
}

Answer 4

检查一下，我用过＆＃34; （NSDateComponents *）组件：（NSCalendarUnit）unitFlags fromDate：（NSDate *）startingDate toDate：（NSDate *）resultDate options：（NSCalendarOptions）opts ＆＃34; 并添加了本地化

Sub PasteValuesSummary()

     Dim LookupValue As String

     Dim LookupRange As Range
     Dim ws As Worksheet

     Set ws = ThisWorkbook.Sheets("Summary")

     Set LookupRange = Sheets("Summary").Range("B1:B1000")

     LookupValue = Sheets("LastUpdate").Range("A1").Value

     If Not IsError(Application.Match(LookupValue, LookupRange, 0)) Then

        Sheets("Summary").Select
        Sheets("Summary").Rows("4:4").Select
        Selection.Insert Shift:=xlDown, CopyOrigin:=xlFormatFromLeftOrAbove
        Sheets("Summary").Range("B4").Select
        Sheets("Summary").Range("B4") = "=LastUpdate!R[-3]C[-1]"
        Sheets("Summary").Range("C2:AP2").Select
        Selection.Copy
        ActiveWindow.ScrollColumn = 1
        Sheets("Summary").Range("C4").Select
        Sheets("Summary").Paste
        Application.CutCopyMode = False
        Selection.Copy
        Sheets("Summary").Range("B4:AP4").Select
        Application.CutCopyMode = False
        Selection.Copy
        Selection.PasteSpecial Paste:=xlPasteValues, Operation:=xlNone, SkipBlanks _
        :=False, Transpose:=False

     End If

End Sub

如何从NSDate计算年龄

4 个答案: