Цель-C: как получить день и дату от NSDate?

Question

Учитывая пример из Convert string to date in my iPhone app

NSString *dateStr = @"Tue, 25 May 2010 12:53:58 +0000"; 

// Convert string to date object 
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init]; 
[dateFormat setDateFormat:@"EE, d LLLL yyyy HH:mm:ss Z"]; 
NSDate *date = [dateFormat dateFromString:dateStr]; 
[dateFormat release]; 

я проверил, какие методы NSDate есть и нашел

Вопрос
Как я могу получить Tue и 25 от *date?

Answer 1

Вы должны использовать NSDateComponents для этого:

NSCalendar * calendar = [NSCalendar currentCalendar]; 
NSDateComponents * dateComponents = [calendar components: NSDayCalendarUnit | NSWeekdayCalendarUnit fromDate: <yourDate>]; 

NSLog(@"Day in week: %ld", (long)dateComponents.weekday); // Day in week: 3 
NSLog(@"Day in month: %ld", (long)dateComponents.day); // Day in month: 25 
NSLog(@"Day name: %@", calendar.shortWeekdaySymbols[dateComponents.weekday - 1]); // Day name: Tue (iOS 8.0 +) 

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Или в Swift

let calendar = NSCalendar.currentCalendar() 
let dateComponents = calendar.components(.DayCalendarUnit | .WeekdayCalendarUnit, fromDate: <yourDate>) 

println("Day in week: \(dateComponents.weekday)") // Day in week: 3 
println("Day in month: \(dateComponents.day)") // Day in month: 25 
println("Day name: \(calendar.shortWeekdaySymbols[dateComponents.weekday - 1])") // Day name: Tue