解决方法
最后,我自己找到了解决方案.在didSelectRow方法中检查所选日期是否是星期日???如果是,则确定,但如果没有,则重新加载组件以选择最近星期日的日期.
func pickerView(pickerView：UIPickerView,didSelectRow行：Int,inComponent组件：Int){
if component == 0 {
pickerView.reloadComponent(1)
}
let titleLabel = pickerView.viewForRow(row,forComponent: component) as? UILabel
titleLabel?.font = UIFont(name: BCGConstants.Fonts.Name.ProximaNovaBold,size: 27)!
var dayValue = pickerView.selectedRowInComponent(1) + 1
let monthValue = pickerView.selectedRowInComponent(0) + 1
var yearValue = 0
let unitFlags: NSCalendarUnit = [.Day,.Month,.Year,.Weekday]
let currentDateComponents = NSCalendar.currentCalendar().components(unitFlags,fromDate: NSDate())
if monthValue > currentDateComponents.month || (dayValue >= currentDateComponents.day && monthValue == currentDateComponents.month ) {
yearValue = currentDateComponents.year
} else {
yearValue = currentDateComponents.year + 1
}
debugPrint("\(self.isGivenDaySunday(dayValue,selectedMonth: monthValue,selectedYear: yearValue)) day = \(dayValue) month = \(monthValue) )")
let sundayCheck = self.isGivenDaySunday(pickerView.selectedRowInComponent(1) + 1,selectedMonth: pickerView.selectedRowInComponent(0) + 1,selectedYear: yearValue)
if sundayCheck.isSunday {
self.startDateTextField.text = sundayCheck.sundayDate?.fullStyleDateString
self.newBootcamp?.startDate = sundayCheck.sundayDate!
} else {
// titleLabel?.font = UIFont(name: BCGConstants.Fonts.Name.ProximaNovaBold,size: 27)!
// titleLabel?.textColor = UIColor.lightGrayColor()
if dayValue > 15 {
dayValue = pickerView.selectedRowInComponent(1) - (7 - sundayCheck.nextSundayAsWeekDay)
pickerView.selectRow(dayValue,inComponent: 1,animated: true)
} else {
dayValue = pickerView.selectedRowInComponent(1) + sundayCheck.nextSundayAsWeekDay
pickerView.selectRow(dayValue,animated: true)
}
var confirmSunday = self.isGivenDaySunday(dayValue + 1,selectedYear: yearValue)
// Added by mohsin : Reason bug : selecting prevIoUs day
if confirmSunday.sundayDate?.isLessThanDate(NSDate()) == true {
confirmSunday = self.isGivenDaySunday(dayValue,selectedYear: yearValue + 1)
//TODO: Need to be verify again : If not working fine then you must try to change next commented statement and uncomment it
// dayValue = pickerView.selectedRowInComponent(1) + sundayCheck.nextSundayAsWeekDay
pickerView.selectRow(dayValue - 1,animated: true)
}
self.startDateTextField.text = confirmSunday.sundayDate?.fullStyleDateString
self.newBootcamp?.startDate = confirmSunday.sundayDate!
debugPrint(confirmSunday.sundayDate?.fullStyleDateString)
}
}
检查星期日的方法是跟随一个
func isGivenDaySunday(selectedDay：Int,selectedMonth：Int,selectedYear：Int) – > (isSunday：Bool,nextSundayAsWeekDay：Int,sundayDate：NSDate？){
let unitFlags：NSCalendarUnit = [.Day,.Weekday]
let selectedDateComponents = NSDateComponents()
selectedDateComponents.month = selectedMonth
selectedDateComponents.day = selectedDay
selectedDateComponents.year = selectedYear
let selectedDate = NSCalendar(identifier: NSCalendarIdentifierGregorian)?.dateFromComponents(selectedDateComponents)
let newSelectedDateComponent = NSCalendar.currentCalendar().components(unitFlags,fromDate: selectedDate!)
if newSelectedDateComponent.weekday == 1 { // 1 means SUNDAY as per Gregorian
return (true,selectedDate)
} else {
return (false,8 - newSelectedDateComponent.weekday,nil)
}
}