[英]Get All Weeks with start date and end date of given month (NSDate Objective C)
我正在嘗試列出給定月份的所有周,例如開始日期 2020 年 9 月 6 日 結束日期 2020 年 9 月 12 日
如果一周在下個月結束,它還應該顯示該日期,如開始日期 2020 年 9 月 27 日結束日期 2020 年 10 月 3 日
一個 function 將 NSDate 作為輸入並使用 NSArray 或 NSDictionary 返回日期數組(一周的開始和結束日期),任何東西都可以工作,只需要給定 NSDate 的開始和結束日期
我已經嘗試過 DateTools、Datez 和其他 pod,但仍然無法獲得這個
-(void) getWeeksOfTheMonthCurrent {
NSCalendar *calendar = [[NSCalendar alloc]initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
NSDateComponents *oneDayAgoComponents = [[NSDateComponents alloc] init];
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
for(int currentdateindexpath=0;currentdateindexpath<=10currentdateindexpath++)
{
NSDateComponents* subcomponent = [calendar components:NSCalendarUnitWeekday
fromDate:[NSDate date]];
[oneDayAgoComponents setDay: 0 - ([subcomponent weekday] - 1)];
NSDate *beginningOfWeek = [calendar dateByAddingComponents:oneDayAgoComponents
toDate:[NSDate date] options:0];
[formatter setDateFormat:@"dd/MM/yy"];
NSString *weekstartdate = [formatter stringFromDate:beginningOfWeek];
NSLog(@"weekstartdate %@",weekstartdate);
NSDateComponents *components =
[calendar components:(NSCalendarUnitYear | NSCalendarUnitMonth |
NSCalendarUnitDay) fromDate: beginningOfWeek];
beginningOfWeek = [calendar dateFromComponents:components];
[oneDayAgoComponents setDay:7- ([subcomponent weekday])];
NSDate *endOfWeek = [calendar dateByAddingComponents:oneDayAgoComponents
toDate:[NSDate date] options:0];
[formatter setDateFormat:@"dd/MM/yy"];
NSString *weekendtdate = [formatter stringFromDate:endOfWeek];
NSLog(@"weekendtdate %@",weekendtdate);
}
}
我已經嘗試使用此代碼獲取開始周日期和結束周日期,但這不是我想要的,我只是想要一個 function,它以 NSDate 作為參數並返回包含開始周日期和結束周日期的對象數組
您不需要使用 3rd 方庫來執行此操作,為此類事情提供了大量的日期函數(主要參見NSCalendar
的文檔)。
這個答案在 Swift 中,但我會讓你弄清楚轉換。
let calendar = Calendar.current
let now = Date()
let monthInterval = calendar.dateInterval(of: .month, for: now)!
var weekIntervals: [DateInterval] = []
var startDate = monthInterval.start
while monthInterval.contains(startDate) {
weekIntervals.append(calendar.dateInterval(of: .weekOfMonth, for: startDate)!)
startDate = calendar.date(byAdding: .weekOfYear, value: 1, to: startDate)!
}
// Not sure why this is needed, seems like the above should handle it
let finalWeek = calendar.dateInterval(of: .weekOfMonth, for: startDate)!
if finalWeek.start < monthInterval.end {
weekIntervals.append(finalWeek)
}
打印結果給出...
let formatter = DateIntervalFormatter()
formatter.dateStyle = .medium
weekIntervals.forEach {
print(formatter.string(from: $0)!)
}
// Jul 26, 2020, 12:00 AM – Aug 2, 2020, 12:00 AM
// Aug 2, 2020, 12:00 AM – Aug 9, 2020, 12:00 AM
// Aug 9, 2020, 12:00 AM – Aug 16, 2020, 12:00 AM
// Aug 16, 2020, 12:00 AM – Aug 23, 2020, 12:00 AM
// Aug 23, 2020, 12:00 AM – Aug 30, 2020, 12:00 AM
// Aug 30, 2020, 12:00 AM – Sep 6, 2020, 12:00 AM
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