[英]Get an Array of days from first day of the month till today Swift
我是iOS和編程方面的新手,我需要某種方式從當前月的第一天到今天獲取一個數組。 直到現在為止的過去3個月中只有一個陣列,但是我不知道該怎么做,請提供任何幫助或想法?
我檢查了一下以獲得月的第一天:
extension Date {
func startOfMonth() -> Date? {
let comp: DateComponents = Calendar.current.dateComponents([.year, .month, .hour], from: Calendar.current.startOfDay(for: self))
return Calendar.current.date(from: comp)!
}
但是它只能在ViewController中工作,如果在我項目的其他部分執行該操作怎么辦? 而且我也不知道如何迭代數組以獲取第一天到今天之間的所有時間...
編輯
我做了這樣的事情,但它給了馬一個無限循環..我在做什么錯?
func weatherDatesFromCurrentDayMonth() -> [Any] {
var date = Date()
let currentCalendar = Calendar.current
var dateComponents = DateComponents()
dateComponents.month = -1
// dateComponents.day = 1
let endingDate = Calendar.current.date(byAdding: dateComponents, to: date)
print("\(endingDate!)")
var datesArray = Array<Any>()
while date.compare(endingDate!) != ComparisonResult.orderedAscending
{
var dateComponents = DateComponents()
dateComponents.day = 1
date = Calendar.current.date(byAdding: dateComponents, to: date)!
datesArray.append(date)
print("\(datesArray)")
}
return [datesArray]
}
您正在無休止的循環,因為在開始時您的endingDate
已經是一個月前,而現在是date
。 由於在循環中您只增加date
所以它永遠不會一直在endingDate
之后,因此您的條件始終為true
試試這個代碼:
func weatherDatesFromCurrentDayMonth() -> [Date] {
let now = Date()
var currentDate = previousMonth(date: now)
var datesArray = [Date]()
while currentDate < now {
datesArray.append(currentDate)
currentDate = nextDay(date:currentDate)
}
print("result: \(datesArray)")
return datesArray
}
func nextDay(date: Date) -> Date {
var dateComponents = DateComponents()
dateComponents.day = 1
return Calendar.current.date(byAdding: dateComponents, to: date)!
}
func previousMonth(date: Date) -> Date {
var dateComponents = DateComponents()
dateComponents.month = -1
return Calendar.current.date(byAdding: dateComponents, to: date)!
}
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