Essential Books

NSDateFormatter

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Converting an NSDate object to string is just 3 steps.

1. Create an NSDateFormatter object

Swift 

let dateFormatter = NSDateFormatter()

Swift 3 

let dateFormatter = DateFormatter()

Objective-C 

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];

2. Set the date format in which you want your string

Swift 

dateFormatter.dateFormat = "yyyy-MM-dd 'at' HH:mm"

Objective-C 

dateFormatter.dateFormat = @"yyyy-MM-dd 'at' HH:mm";

3. Get the formatted string

Swift 

let date = NSDate() // your NSDate object
let dateString = dateFormatter.stringFromDate(date)

Swift 3 

let date = Date() // your NSDate object
let dateString = dateFormatter.stringFromDate(date)

Objective-C 

NSDate *date = [NSDate date]; // your NSDate object
NSString *dateString = [dateFormatter stringFromDate:date];

This will give output something like this: 2001-01-02 at 13:00

Note

Creating an NSDateFormatter instance is an expensive operation, so it is recommended to create it once and reuse when possible.

Useful extension for converting date to string. 

extension Date {
        func toString() -> String {
            let dateFormatter = DateFormatter()
            dateFormatter.dateFormat = "MMMM dd yyyy"
            return dateFormatter.string(from: self)
        }
}

Useful links for swift date-formation swiftly-getting-human-readable-date-nsdateformatter.

For constructing date formats see date format patterns.

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NSDate:
* NSDate
* NSDateFormatter
* Date Comparison
* Get Historic Time from NSDate eg 5s ago 2m ago 3h ago
* Get Unix Epoch time
* Get time cycle type 12-hour or 24-hour
* Get NSDate from JSON Date format Date1268123281843
* Get Current Date
* 08Convert NSDate that is composed from hour and minute only to a full NSDate
* Time offset from NSDate with TimeZone
* Get NSDate Object N seconds from current date
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