ios - 获取本地 PDF 页面高度 - iOS

Question

我有一个 pdf 本地存储在 iphone 中。我想获得具有路径的 pdf 的高度。我试过:

NSURL *pdfUrl = [NSURL fileURLWithPath:self.documentPath];
CGPDFDocumentRef document = CGPDFDocumentCreateWithURL(CFBridgingRetain(pdfUrl));
float width = CGPDFPageGetBoxRect(CGPDFDocumentGetPage(document, 0), kCGPDFMediaBox).size.width;
float height = CGPDFPageGetBoxRect(CGPDFDocumentGetPage(document, 0), kCGPDFMediaBox).size.height;

但是该文档为空，我不知道还有其他方法可以做到这一点。

Answer 1

试试这个，希望对你有帮助:)

// fileName is the PDF path
NSData *pdfData = [NSData dataWithContentsOfFile: @"__PDF_PATH"];

// Convert NSData to CFDataRef
CFDataRef thePDFdata = (__bridge CFDataRef)pdfData;

// Create CGDataProviderRef object from data
CGDataProviderRef providerObj = CGDataProviderCreateWithCFData(thePDFdata);

// Create the PDF using provider object
CGPDFDocumentRef pdfDoc = CGPDFDocumentCreateWithProvider(providerObj);

// Get the first page of the PDF
CGPDFPageRef pdfPageRef = CGPDFDocumentGetPage(pdfDoc, 1);

// Get the rect object from page 1
CGRect pdfPageRect = CGPDFPageGetBoxRect(pdfPageRef, kCGPDFMediaBox);

float width = pdfPageRect.size.width;
float height = pdfPageRect.size.height;

NSLog(@"WIDTH: %f HEIGHT: %f", width, height);