UIDatePicker，根据日期名称和今天的日期设置最大和最小日期

Question

I have a UIDatePicker, and I wish to set the minimum and maximum date range to be between Thursday to Wednesday of the current week, how would I set that up? picker date is the date picker and datepicker text field is text field

pickerDate.datePickerMode = UIDatePickerMode.Date
var dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "dd MMM yyyy"
datePickerTextField.text = dateFormatter.stringFromDate(pickerDate.date)

Answer 1

I would try the following:

• Create an instance of NSCalendar
• Create the date components (including NSCalendarUnit.WeekOfYear from the current date using the calendar
• Create date components with the desired values for NSCalendarUnit.Weekday
• Use calendar to calculate the dates from the date components

Answer 2

I think you want something like this.

NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
NSDate *currentDate = [NSDate date];

NSDateComponents *comps = [[NSDateComponents alloc] init];

[comps setDay: -7];
NSDate *minDate = [calendar dateByAddingComponents:comps toDate:currentDate options:0];

[datePicker setMaximumDate:currentDate];
[datePicker setMinimumDate:minDate];