Problem with pdf when opening in UIWebView

Question

I have a problem opening a pdf file in UIWebView. Zooming and zooming out does not work, and even double-clicking does not increase the font size in pdf format.
Guys, there is a way to do this ....
If not, can someone share some code ....

Answer 1

#import @interface TiledPDFView : UIView { CGPDFPageRef pdfPage; CGFloat myScale; } - (id)initWithFrame:(CGRect)frame andScale:(CGFloat)scale; - (void)setPage:(CGPDFPageRef)newPage; @end #import "TiledPDFView.h" #import @implementation TiledPDFView // Create a new TiledPDFView with the desired frame and scale. - (id)initWithFrame:(CGRect)frame andScale:(CGFloat)scale{ if ((self = [super initWithFrame:frame])) { CATiledLayer *tiledLayer = (CATiledLayer *)[self layer]; tiledLayer.levelsOfDetail = 4; tiledLayer.levelsOfDetailBias = 4; tiledLayer.tileSize = CGSizeMake(512.0, 512.0); myScale = scale; } return self; } // Set the layer class to be CATiledLayer. + (Class)layerClass { return [CATiledLayer class]; } // Set the CGPDFPageRef for the view. - (void)setPage:(CGPDFPageRef)newPage { CGPDFPageRelease(self->pdfPage); self->pdfPage = CGPDFPageRetain(newPage); } -(void)drawRect:(CGRect)r { // UIView uses the existence of -drawRect: to determine if it should allow its CALayer // to be invalidated, which would then lead to the layer creating a backing store and // -drawLayer:inContext: being called. // By implementing an empty -drawRect: method, we allow UIKit to continue to implement // this logic, while doing our real drawing work inside of -drawLayer:inContext: } // Draw the CGPDFPageRef into the layer at the correct scale. -(void)drawLayer:(CALayer*)layer inContext:(CGContextRef)context { // First fill the background with white. CGContextSetRGBFillColor(context, 1.0,1.0,1.0,0.5); CGContextFillRect(context,self.bounds); CGContextSaveGState(context); // Flip the context so that the PDF page is rendered // right side up. CGContextTranslateCTM(context, 0.0, self.bounds.size.height); // Scale the context so that the PDF page is rendered // at the correct size for the zoom level. CGContextScaleCTM(context, myScale,myScale); CGContextDrawPDFPage(context, pdfPage); CGContextRestoreGState(context); } // Clean up. - (void)dealloc { CGPDFPageRelease(pdfPage); [super dealloc]; } @end 

Add this to your project ...
Hope this helps ...

Answer 2

Make sure Multiple Touch is enabled for the UIWebView.