0
iOS 용 그리기 및 인쇄 가이드 (http://developer.apple.com/library/ios/#documentation/2DDrawing/Conceptual/DrawingPrintingiOS/GeneratingPDF/GeneratingPDF.html#)를 읽고 있습니다. // apple_ref/doc/uid/TP40010156-CH10-SW1). 내가 필요한 것을 얻기 위해 조금 수정하려고하고있다. 기본적으로 색이 지정된 사각형, NSString에서 텍스트, 다른 색 사각형, NSString에서 텍스트의 두 번째 블록을 그리려고합니다. 각 문자열에 하나씩 두 개의 프레임 세트를 만들고 renderPage : 메서드를 두 번 호출합니다. 그러나 화면 아래쪽에 텍스트를 거꾸로 그립니다. 이유는 모르겠습니다. (코드가 왜 그런 식으로 작동하는지, 왜 작동하지 않는지 이해하지 못하면 어떻게해야 하는지를 알기 위해 주석에 몇 가지 질문을 넣었습니다.) 감사!석영에서 PDF 생성 도움말
CFAttributedStringRef overviewText = CFAttributedStringCreate(NULL, (CFStringRef)overview, NULL);
CFAttributedStringRef resultText = CFAttributedStringCreate(NULL, (CFStringRef)result, NULL);
if (overviewText != NULL || resultText != NULL) {
CTFramesetterRef overviewFramesetter = CTFramesetterCreateWithAttributedString(overviewText);
CTFramesetterRef resultFramesetter = CTFramesetterCreateWithAttributedString(resultText);
if (overviewFramesetter != NULL || resultFramesetter != NULL) {
// Create the PDF context using the default page size of 612 x 792.
UIGraphicsBeginPDFContextToFile(filePath, CGRectZero, nil);
CFRange currentRange = CFRangeMake(0, 0);
NSInteger currentPage = 0;
BOOL done = NO;
do {
// Mark the beginning of a new page.
UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0, PDF_WIDTH, PDF_HEIGHT), nil);
[self drawPDFTitle:fileName];
[self drawRectangleAtPosition:CGPointMake(MARGIN, 50)];
// Draw a page number at the bottom of each page
currentPage++;
[self drawPageNumber:currentPage];
// Render the current page and update the current range to
// point to the beginning of the next page.
currentRange = [self renderPage:currentPage withTextRange:currentRange andFramesetter:overviewFramesetter];
NSLog(@"%ld, %ld", currentRange.location, currentRange.length);
// at first I tried doing this, but would get an error at the CFRelease in renderPage method. I'm not sure as to why I get the error since the function renderPage: seems to be the method to write the data to the PDF context.
currentRange = [self renderPage:currentPage withTextRange:currentRange andFramesetter:resultFramesetter];
// If we're at the end of the text, exit the loop.
if (currentRange.location == CFAttributedStringGetLength((CFAttributedStringRef)overviewText))
done = YES;
}
while (!done);
do {
// I do not know why I would need to flip the context again since the method renderPage: already does this for me right?
//CGContextTranslateCTM(UIGraphicsGetCurrentContext(), 0, PDF_HEIGHT);
//CGContextScaleCTM(UIGraphicsGetCurrentContext(), 1.0, -1.0);
currentRange = [self renderPage:currentPage withTextRange:currentRange andFramesetter:resultFramesetter];
NSLog(@"2nd loop: %ld, %ld", currentRange.location, currentRange.length);
if (currentRange.location == CFAttributedStringGetLength((CFAttributedStringRef)overviewText))
done = YES;
}
while (!done);
// Close the PDF context and write the contents out.
UIGraphicsEndPDFContext();
// Release the framewetter.
CFRelease(overviewFramesetter);
}