[英]How to convert .png image to .pdf in iOS programmatically
如何將 .png 格式的圖像轉換為 .pdf 文件?
使用以下代碼從圖像創建 PDF 文件。
UIImage* image = [UIImage imageNamed:@"sample.png"];
CGRect frame = CGRectMake(20, 100, 300, 60);
NSString* fileName = @"FileName.PDF";
NSArray *arrayPaths =
NSSearchPathForDirectoriesInDomains(
NSDocumentDirectory,
NSUserDomainMask,
YES);
NSString *path = [arrayPaths objectAtIndex:0];
NSString* pdfFileName = [path stringByAppendingPathComponent:fileName];
// Create the PDF context using the default page size of 612 x 792.
UIGraphicsBeginPDFContextToFile(pdfFileName, CGRectZero, nil);
// Mark the beginning of a new page.
UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0, 612, 792), nil);
[image drawInRect:frame];
// Close the PDF context and write the contents out.
UIGraphicsEndPDFContext();
-(void)createPdf:(NSImage*)image
{
PDFDocument *pdf = [[PDFDocument alloc] init];
NSImage *image = [[NSImage alloc] initWithContentsOfFile:fileName];
PDFPage *page = [[PDFPage alloc] initWithImage:image];
[pdf insertPage:page atIndex: [pdf pageCount]];
[pdf writeToFile:path];
}
使用上述方法如下:
NSImage *image = [[NSImage alloc] initWithContentsOfFile:PATH_OF_YOUR_PNG_FILE];
[self createPdf:image];
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