iOS 基础类解析 - NSDate

iOS 基础类解析 - NSDate

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NSDate Class Reference

Inherits from

NSObject

Conforms to

NSCopying
NSSecureCoding
NSObject (NSObject)

Framework

/System/Library/Frameworks/Foundation.framework

Availability

Available in iOS 2.0 and later.

Declared in

NSDate.h

Companion guides

Date and Time Programming Guide
Property List Programming Guide

Related sample code

MVCNetworking

TableView Fundamentals for iOS

TopSongs

URLCache

XMLPerformance

Creating and Initializing Date Objects

• + date
• + dateWithTimeIntervalSinceNow:
• + dateWithTimeInterval:sinceDate:
• + dateWithTimeIntervalSinceReferenceDate:
• + dateWithTimeIntervalSince1970:
• – init
• – initWithTimeIntervalSinceNow:
• – initWithTimeInterval:sinceDate:
• – initWithTimeIntervalSinceReferenceDate:
• – initWithTimeIntervalSince1970:

Getting Temporal Boundaries

• + distantFuture
• + distantPast

Comparing Dates

• – isEqualToDate:
• – earlierDate:
• – laterDate:
• – compare:

Getting Time Intervals

• – timeIntervalSinceDate:
• – timeIntervalSinceNow
• + timeIntervalSinceReferenceDate
• – timeIntervalSinceReferenceDate
• – timeIntervalSince1970

Adding a Time Interval

• – dateByAddingTimeInterval:
• – addTimeInterval: Deprecated in iOS 4.0

Representing Dates as Strings

• – description
• – descriptionWithLocale:

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