iOS  将图像数据转换成…

#import

@interface

NSImage

(ESSImageCategory)

- (

NSData

*)

JPEGRepresentation

;

- (

NSData

*)

JPEG2000Representation

;

- (

NSData

*)

PNGRepresentation

;

- (

NSData

*)

GIFRepresentation

;

- (

NSData

*)

BMPRepresentation

;

@end

//===================================

//ESSImageCategory source preview

//

//  ESSImageCategory.m

//

//  Created by Matthias Gansrigler on
1/24/07.

//  Copyright 2007 Eternal Storms Software. All
rights reserved.

//

#import "ESSImageCategory.h"

@implementation

NSImage

(ESSImageCategory)

- (NSData* )representationForFileType: (NSBitmapImageFileType)
fileType

{

NSData

*temp = [

self

TIFFRepresentation

];

NSBitmapImageRep

*bitmap = [

NSBitmapImageRep

imageRepWithData

:temp];

NSData

*imgData = [bitmap

representationUsingType

:fileType

properties

:nil

];

return

imgData;

}

- (

NSData

*)JPEGRepresentation

{

return

[

self

representationForFileType

:

NSJPEGFileType

];

}

- (

NSData

*)PNGRepresentation

{

return

[

self

representationForFileType

:

NSPNGFileType

];

}

- (

NSData

*)JPEG

2

0

0

0

Representation

{

return

[

self

representationForFileType

:

NSJPEG2000FileType

]; 

}

- (

NSData

*)GIFRepresentation

{

return

[

self

representationForFileType

:

NSGIFFileType

]; 

}

- (

NSData

*)BMPRepresentation

{

return

[

self

representationForFileType

:

NSBMPFileType

];   

}

@end