TOPIC:

I want to show all pdf page in gridvieww (Collection view). how to get view,context,image or any nsdata from PDFPage so we show all pages in gridview.please reply asap.

step 1. create PDFDIB object for render, and invoke [PDFPage renderPrepare];
step 2. render the page to PDFDIB object using [PDFPage render];
step 3. create CGImage like:step 4. set CGImageRef to image view of cell.

notice: step 1 - 3 can be run on backing thread, and do not release PDFDIB object till CGImageRef object not used.

i am using your step but this gives me blank image. please help on this.


PDFDIB *dib = [[PDFDIB alloc] init:100 :100];
PDFMatrix *mat = [[PDFMatrix alloc] init:10 :10 :100 :100];
[page renderPrepare:dib];
[page render:dib :mat :1];
Byte *data = (Byte *)[dib data];
int w = [dib width];
int h = [dib height];
CGDataProviderRef provider = CGDataProviderCreateWithData( NULL, data, w * h * 4, NULL );
CGColorSpaceRef cs = CGColorSpaceCreateDeviceRGB();
CGImageRef img = CGImageCreate( w, h, 8, 32, w<<2, cs, kCGBitmapByteOrder32Little|kCGImageAlphaNoneSkipFirst, provider, NULL, FALSE, kCGRenderingIntentDefault );
UIImage *image = [UIImage imageWithCGImage:img];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
[self saveImage:image withFileName:@"mahesh" ofType:@"jpeg" inDirectory:documentsDirectory];

parameters are wrong.
codes like this:
int pageNO = 0;
float scale = 1.2f;
int width = [PDFDoc pageWidth:pageNO] * scale;
int height = [PDFDoc pageHeight:pageNO] * scale;
PDFDIB *dib = [[PDFDIB alloc] init:width :height];
PDFMatrix *mat = [[PDFMatrix alloc] init: scale : -scale : 0 : height ];
[page renderPrepare:dib];
[page render:dib :mat :1];
...

Thanks for help..