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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