坦白地說，在以編程方式繪制PDF文件時，使用CoreGraphics框架是一項繁瑣的工作。我想以編程方式創建PDF，使用整個應用程序視圖中的各種對象。我很想知道iOS SDK是否有不錯的PDF教程，也許是庫中的一個。我看過本教程PDF Creation Tutorial，但是它主要是用C編寫的。尋找更多的Objective-C風格。這似乎是寫入PDF文件的一種荒謬方法，必須計算線和其他對象的放置位置。void CreatePDFFile (CGRect pageRect, const char *filename) {       // This code block sets up our PDF Context so that we can draw to it    CGContextRef pdfContext;    CFStringRef path;    CFURLRef url;    CFMutableDictionaryRef myDictionary = NULL;    // Create a CFString from the filename we provide to this method when we call it    path = CFStringCreateWithCString (NULL, filename,                                      kCFStringEncodingUTF8);    // Create a CFURL using the CFString we just defined    url = CFURLCreateWithFileSystemPath (NULL, path,                                         kCFURLPOSIXPathStyle, 0);    CFRelease (path);    // This dictionary contains extra options mostly for 'signing' the PDF    myDictionary = CFDictionaryCreateMutable(NULL, 0,                                             &kCFTypeDictionaryKeyCallBacks,                                             &kCFTypeDictionaryValueCallBacks);    CFDictionarySetValue(myDictionary, kCGPDFContextTitle, CFSTR("My PDF File"));    CFDictionarySetValue(myDictionary, kCGPDFContextCreator, CFSTR("My Name"));    // Create our PDF Context with the CFURL, the CGRect we provide, and the above defined dictionary    pdfContext = CGPDFContextCreateWithURL (url, &pageRect, myDictionary);    // Cleanup our mess    CFRelease(myDictionary);    CFRelease(url);    // Done creating our PDF Context, now it's time to draw to it    // Starts our first page    CGContextBeginPage (pdfContext, &pageRect);    // Draws a black rectangle around the page inset by 50 on all sides    CGContextStrokeRect(pdfContext, CGRectMake(50, 50, pageRect.size.width - 100, pageRect.size.height - 100));