pouvons-nous enregistrer le contenu dessiné sur le pdf comme un nouveau pdf? Xcode

Question

Peut-on enregistrer le contenu tirés sur le pdf, comme pdf encore une fois, j'ai essayé de sauvegarder le pdf avec le contenu mais pas de chance, il enregistre avec blanc pdf

le code:

- (void)drawRect:(CGRect)rect 
{ 
NSString *pathToPdfDoc = [[NSBundle mainBundle] pathForResource:@"myPDF" ofType:@"pdf"]; 
NSURL *pdfUrl = [NSURL fileURLWithPath:pathToPdfDoc]; 
document = CGPDFDocumentCreateWithURL((__bridge CFURLRef)pdfUrl); 
size_t count = CGPDFDocumentGetNumberOfPages (document);// 3 

if (count == 0) 
{ 
    NSLog(@"PDF needs at least one page"); 
    return; 
} 

CGRect paperSize = CGRectMake(0.0,0.0,595.28,841.89); 

CGContextRef currentContext = UIGraphicsGetCurrentContext(); 

// flip context so page is right way up 
CGContextTranslateCTM(currentContext, 0, paperSize.size.height); 
CGContextScaleCTM(currentContext, 1.0, -1.0); 

CGPDFPageRef page = CGPDFDocumentGetPage (document, 1); // grab page 1 of the PDF 

CGContextDrawPDFPage (currentContext, page); // draw page 1 into graphics context 

// flip context so annotations are right way up 
CGContextScaleCTM(currentContext, 1.0, -1.0); 
CGContextTranslateCTM(currentContext, 0, -paperSize.size.height); 

//////////////////////////////// 

[curImage drawAtPoint:CGPointMake(0, 0)]; 
CGPoint mid1 = midPoint(previousPoint1, previousPoint2); 
CGPoint mid2 = midPoint(currentPoint, previousPoint1); 

CGContextRef context = UIGraphicsGetCurrentContext(); 

[self.layer renderInContext:context]; 

CGContextMoveToPoint(context, mid1.x, mid1.y); 
CGContextAddQuadCurveToPoint(context, previousPoint1.x, previousPoint1.y, mid2.x, mid2.y); 
CGContextSetLineCap(context, kCGLineCapRound); 
CGContextSetLineWidth(context, self.lineWidth); 
CGContextSetStrokeColorWithColor(context, self.lineColor.CGColor); 

CGContextStrokePath(context); 

[super drawRect:rect]; 

// get a temprorary filename for this PDF 

NSString* path = [[NSBundle mainBundle] pathForResource:@"sampleData" ofType:@"plist"]; 
path = NSTemporaryDirectory(); 
self.pdfFilePath = [path stringByAppendingPathComponent:[NSString stringWithFormat:@"%d.pdf", [[NSDate date] timeIntervalSince1970] ]]; 

UIGraphicsBeginPDFContextToFile(@"test.pdf", paperSize, nil); 

[@"annotation" drawInRect:CGRectMake(100.0, 100.0, 200.0, 40.0) withFont:[UIFont systemFontOfSize:18.0]]; 
} 

Et j'ai essayé de fermer le PDF sur le bouton cliquez sur

- (IBAction)buttonPressed:(UIButton *)button { 
UIGraphicsEndPDFContext(); 
return; 
} 

Mais ça ne fonctionne pas.

Toute aide sera grandement appréciée, grâce à l'avance

Answer 1

figured it out, voici la fonction pour créer le pdf avec le contenu dessiné ou annotés sur elle

-(void)createPDFfromUIView:(UIView*)aView saveToDocumentsWithFileName: (NSString*)aFilename 


{ 
// Creates a mutable data object for updating with binary data, like a byte array 
NSMutableData *pdfData = [NSMutableData data]; 

// Points the pdf converter to the mutable data object and to the UIView to be converted 
UIGraphicsBeginPDFContextToData(pdfData, aView.bounds, nil); 
UIGraphicsBeginPDFPage(); 
CGContextRef pdfContext = UIGraphicsGetCurrentContext(); 


// draws rect to the view and thus this is captured by UIGraphicsBeginPDFContextToData 


[aView.layer renderInContext:pdfContext]; 

// remove PDF rendering context 
UIGraphicsEndPDFContext(); 

// Retrieves the document directories from the iOS device 
NSArray* documentDirectories = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES); 

NSString* documentDirectory = [documentDirectories objectAtIndex:0]; 
NSString* documentDirectoryFilename = [documentDirectory stringByAppendingPathComponent:aFilename]; 

// instructs the mutable data object to write its context to a file on disk 
[pdfData writeToFile:documentDirectoryFilename atomically:YES]; 
NSLog(@"documentDirectoryFileName: %@",documentDirectory); 
} 

et a appelé la fonction sur cliquez sur le bouton.