ios - How can I display the time offset (years, months, weeks, ...) from two dates at my labels? -


i getting use of unresolved identifier 'self' in app. after reading this link, wrapped code in class.

note: using extension got answer @ s.o.

class setdate {      var seconds = date2.secondsfrom(date1)     var minutes = date2.minutesfrom(date1)     var hours = date2.hoursfrom(date1)     var days = date2.daysfrom(date1)     var weeks = date2.weeksfrom(date1)     var months = date2.monthsfrom(date1)     var years = date2.yearsfrom(date1)      func setlabels(seconds,minute,hous,weeks,days,months,years) {         self.slabel.text = s         self.mlabel.text = min         self.hlabel.text = h         self.wlabel.text = w         self.dlabel.text = d         self.mlabel.text = m         self.ylabel.text = y     }      setlabels(seconds,minutes,hours,weeks,days,months,years) }

how can resolve issue?

i have created new extension output offset components string you:

import uikit extension nsdate {     func yearsfrom(date:nsdate) -> int{         return nscalendar.currentcalendar().components(.calendarunityear, fromdate: date, todate: self, options: nil).year     }     func monthsfrom(date:nsdate) -> int{         return nscalendar.currentcalendar().components(.calendarunitmonth, fromdate: date, todate: self, options: nil).month     }     func weeksfrom(date:nsdate) -> int{         return nscalendar.currentcalendar().components(.calendarunitweekofyear, fromdate: date, todate: self, options: nil).weekofyear     }     func daysfrom(date:nsdate) -> int{         return nscalendar.currentcalendar().components(.calendarunitday, fromdate: date, todate: self, options: nil).day     }     func hoursfrom(date:nsdate) -> int{         return nscalendar.currentcalendar().components(.calendarunithour, fromdate: date, todate: self, options: nil).hour     }     func minutesfrom(date:nsdate) -> int{         return nscalendar.currentcalendar().components(.calendarunitminute, fromdate: date, todate: self, options: nil).minute     }     func secondsfrom(date:nsdate) -> int{         return nscalendar.currentcalendar().components(.calendarunitsecond, fromdate: date, todate: self, options: nil).second     }      func offsetcomponentsfrom(date:nsdate) -> (years:string,months:string,weeks:string,days:string,hours:string,minutes:string,seconds:string) {          let yearsfromdate = yearsfrom(date)         let years = "\(yearsfromdate) year" + {return yearsfromdate > 1 ? "s" : ""}()          let monthsfromdate = monthsfrom(date)         let months =  "\(monthsfromdate) month" + {return monthsfromdate > 1 ? "s" : ""}()          let weeksfromdate = weeksfrom(date)         let weeks = "\(weeksfromdate) week" + {return weeksfromdate > 1 ? "s" : ""}()          let daysfromdate = daysfrom(date)         let days =  "\(daysfromdate) day" + {return daysfromdate > 1 ? "s" : ""}()          let hoursfromdate = hoursfrom(date)         let hours =  "\(hoursfromdate) hour" + {return hoursfromdate > 1 ? "s" : ""}()          let minutesfromdate = minutesfrom(date)         let minutes = "\(minutesfromdate) minute" + {return minutesfromdate > 1 ? "s" : ""}()          let secondsfromdate = secondsfrom(date)         let seconds = "\(secondsfromdate) second" + {return secondsfromdate > 1 ? "s" : ""}()         return (years,months,weeks,days, hours, minutes, seconds)     } }

testing

let date1 = nscalendar.currentcalendar().datewithera(1, year: 2014, month: 11, day: 28, hour: 5, minute: 9, second: 0, nanosecond: 0)! let date2 = nscalendar.currentcalendar().datewithera(1, year: 2015, month: 8, day: 28, hour: 5, minute: 9, second: 0, nanosecond: 0)!  func setlabels() {     let components = date2.offsetcomponentsfrom(date1)     let years = components.years       // "0 year"     let months = components.months     // "9 months"     let weeks = components.weeks       // "39 weeks"     let days = components.days         // "273 days"     let hours = components.hours       // "6553 hours"     let minutes = components.minutes   // "393180 minutes"     let seconds = components.seconds   // "23590800 seconds"      // set labels     //     // yearslabel.text = years     // monthslabel.text = months     // weekslabel.text = weeks     // dayslabel.text = days     // hourslabel.text = hours     // minuteslabel.text = minutes     // secondslabel.text = seconds  }  setlabels()

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