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NSValue QTKit Additions Reference

Overview

The QuickTime Kit supports categories in the Foundation framework’s NSValue class that allow you to get QTTime and QTTimeRange structures as objects of type NSValue. In Mac OS X v10.5, QTKit defines extra operations on the SMPTETime type. SMPTETime is defined in CoreAudio/CoreAudioTypes.h.

Tasks

Wrapping Time and Time Range Structures

• + valueWithQTTime:
• + valueWithQTTimeRange:
• + valueWithSMPTETime:
• – QTTimeValue
• – SMPTETimeValue
• – QTTimeRangeValue

Class Methods

valueWithQTTime:

Creates an NSValue object that wraps the specified QTTime structure.

+ (NSValue *)valueWithQTTime:(QTTime)time

Availability

• Available in Mac OS X v10.3 and later.

Related Sample Code

• QTAudioExtractionPanel
• QTKitMovieShuffler

Declared In

QTTime.h

valueWithQTTimeRange:

Creates an NSValue object that wraps the specified QTTimeRange structure.

+ (NSValue *)valueWithQTTimeRange:(QTTimeRange)range

Availability

• Available in Mac OS X v10.3 and later.

Declared In

QTTimeRange.h

valueWithSMPTETime:

Returns a new NSValue object containing an SMPTETime.

+ (NSValue *)valueWithSMPTETime:(SMPTETime)time

Availability

• Mac OS X v10.5 and later.

Declared In

QTTime.h

Instance Methods

QTTimeRangeValue

Returns a QTTimeRange structure that contains the range in an NSValue object.

- (QTTimeRange)QTTimeRangeValue

Availability

• Available in Mac OS X v10.3 and later.

Declared In

QTTimeRange.h

QTTimeValue

Returns a QTTime structure that contains the time in an NSValue object.

- (QTTime)QTTimeValue

Availability

• Available in Mac OS X v10.3 and later.

Related Sample Code

• QTKitMovieShuffler

Declared In

QTTime.h

SMPTETimeValue

Returns a SMPTETime structure contained in an NSValue.

- (SMPTETime)SMPTETimeValue

Availability

• Mac OS X v10.5 and later.

Declared In

QTTime.h

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