[英]Swift: Calculate time between two dates
I have a text field in my storyboard and have created the following outlet in the corresponding ViewController: 我的情节提要中有一个文本字段,并在相应的ViewController中创建了以下出口:
@IBOutlet weak var birthday: UITextField!
The user will put in their month and day in "MM/DD" format and then press enter. 用户将以“ MM / DD”格式输入其月份和日期,然后按Enter。 I want to be able to calculate the number of days since their birthday (not including today) and then use that number in an equation.
我希望能够计算自他们生日(不包括今天)以来的天数,然后在公式中使用该天数。
How do I calculate the range? 如何计算范围?
If you are providing the textFiled option use, UIPickerView (.date) to input the date so that user does not mess up with the format. 如果要提供textFiled选项,请使用UIPickerView(.date)输入日期,以使用户不会弄乱格式。 Then use the following code to get the date from input to current date :-
然后使用以下代码获取从输入到当前日期的日期:-
let calendar: NSCalendar = NSCalendar.currentCalendar()
let firstDate = NSDate() // Current date
let dateString = "06-10-2016"// Get input(date) from textfield
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "dd-MM-yyyy"
let secondDate = dateFormatter.dateFromString(dateString)
let date1 = calendar.startOfDayForDate(firstDate)
let date2 = calendar.startOfDayForDate(secondDate!)
let flags = NSCalendarUnit.Day
let components = calendar.components(flags, fromDate: date1, toDate: date2, options: [])
print("amount of days \(components.day)")
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