1、得到当前月第一天、最后一天日期
//本月开始日期
func startOfCurrentMonth() -> Date {
let date = Date()
let calendar = NSCalendar.current
let components = calendar.dateComponents(
Set<Calendar.Component>([.year, .month]), from: date)
let startOfMonth = calendar.date(from: components)!
return startOfMonth
}
//本月结束日期
func endOfCurrentMonth(returnEndTime:Bool = false) -> Date {
let calendar = NSCalendar.current
var components = DateComponents()
components.month = 1
if returnEndTime {
components.second = -1
} else {
components.day = -1
}
let endOfMonth = calendar.date(byAdding: components, to: startOfCurrentMonth())!
return endOfMonth
}
测试使用
//创建一个日期格式器
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy年MM月dd日 HH:mm:ss"
//当月第一天日期
let startDate = startOfCurrentMonth()
print("本月开始时间:", dateFormatter.string(from: startDate as Date))
//当月最后一天日期1
let endDate1 = endOfCurrentMonth()
print("本月结束时间1:", dateFormatter.string(from: endDate1))
//当月最后一天日期2
let endDate2 = endOfCurrentMonth(returnEndTime: true)
print("本月结束时间2:", dateFormatter.string(from: endDate2))
2、得到当年第一天、最后一天日期
//本年开始日期
func startOfCurrentYear() -> Date {
let date = Date()
let calendar = NSCalendar.current
let components = calendar.dateComponents(Set<Calendar.Component>([.year]), from: date)
let startOfYear = calendar.date(from: components)!
return startOfYear
}
//本年结束日期
func endOfCurrentYear(returnEndTime:Bool = false) -> Date {
let calendar = NSCalendar.current
var components = DateComponents()
components.year = 1
if returnEndTime {
components.second = -1
} else {
components.day = -1
}
let endOfYear = calendar.date(byAdding: components, to: startOfCurrentYear())!
return endOfYear
}
测试:
//创建一个日期格式器
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy年MM月dd日 HH:mm:ss"
//本年度第一天日期
let startDate = startOfCurrentYear()
print("本年度开始时间:", dateFormatter.string(from: startDate))
//本年度最后一天日期1
let endDate1 = endOfCurrentYear()
print("本年度结束时间1:", dateFormatter.string(from: endDate1))
//本年度最后一天日期2
let endDate2 = endOfCurrentYear(returnEndTime: true)
print("本年度结束时间2:", dateFormatter.string(from: endDate2))
3、得到指定年月的第一天、最后一天日期
//指定年月的开始日期
func startOfMonth(year: Int, month: Int) -> Date {
let calendar = NSCalendar.current
var startComps = DateComponents()
startComps.day = 1
startComps.month = month
startComps.year = year
let startDate = calendar.date(from: startComps)!
return startDate
}
//指定年月的结束日期
func endOfMonth(year: Int, month: Int, returnEndTime:Bool = false) -> Date {
let calendar = NSCalendar.current
var components = DateComponents()
components.month = 1
if returnEndTime {
components.second = -1
} else {
components.day = -1
}
let endOfYear = calendar.date(byAdding: components,
to: startOfMonth(year: year, month:month))!
return endOfYear
}
测试代码:
//创建一个日期格式器
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy年MM月dd日 HH:mm:ss"
//当月第一天日期
let startDate = startOfMonth(year: 2016, month: 8)
print("2016年8月的开始时间:", dateFormatter.string(from: startDate))
//当月最后一天日期1
let endDate1 = endOfMonth(year: 2016, month: 8)
print("2016年8月的结束时间1:", dateFormatter.string(from: endDate1))
//当月最后一天日期2
let endDate2 = endOfMonth(year: 2016, month: 8, returnEndTime: true)
print("2016年8月的结束时间2:", dateFormatter.string(from: endDate2))
网友评论