[英]Problems reading PDF document using iPhone SDK?
任何人成功尝试使用iPhone API读取PDF文档的目录字典吗? 我没有得到任何有意义的信息:目录中的大多数词典都是空的。
尝试这个:
CGPDFDictionaryRef catalog = CGPDFDocumentGetCatalog(myDocument);
CGPDFDictionaryApplyFunction(catalog, streamInfoFunction, catalog);
Catalog基本上是一本字典,您可以在其上使用如图所示的applier函数。
void streamInfoFunction ( const char *key,CGPDFObjectRef object, void *info )
{
NSLog(@"---------------------------------------------------------------------------------------------");
NSLog(@"Processing Stream Info");
NSString *keyStr = [NSString stringWithCString:key encoding:NSUTF8StringEncoding];
CGPDFDictionaryRef contentDict = (CGPDFDictionaryRef)info;
CGPDFObjectType objectType = CGPDFObjectGetType(object);
if(objectType == kCGPDFObjectTypeDictionary)
{
CGPDFDictionaryRef value = NULL;
CGPDFDictionaryGetDictionary(contentDict, key, &value);
NSLog(@"Value for key %@ is %d",keyStr,CGPDFDictionaryGetCount(value));
//S.SNSLog(@"%@",value);
}
else if(objectType == kCGPDFObjectTypeArray)
{
CGPDFArrayRef value = NULL;
CGPDFDictionaryGetArray(contentDict, key, &value);
NSLog(@"Value for key %@ is %d",keyStr,CGPDFArrayGetCount(value));
//S.SNSLog(@"%@",value);
}
else if(objectType == kCGPDFObjectTypeStream)
{
CGPDFStreamRef value = NULL;
CGPDFDictionaryGetStream(contentDict, key, &value);
NSLog(@"Processing for key %@",keyStr);
CGPDFDataFormat dataFormat;
CFDataRef streamData = CGPDFStreamCopyData(value, &dataFormat);
CFShow(streamData);
NSString *contentString = [[NSString alloc]initWithBytes:[(NSData*)streamData bytes] length:[(NSData*)streamData length] encoding:NSUTF8StringEncoding];
NSLog(@"%@",contentString);
}
else if(objectType == kCGPDFObjectTypeInteger)
{
CGPDFInteger integerValue;
CGPDFDictionaryGetInteger(contentDict, key, &integerValue);
NSLog(@"Processing for Key %@ value %d",keyStr,integerValue);
}
else if(objectType == kCGPDFObjectTypeName)
{
const char *name;
CGPDFDictionaryGetName(contentDict, key, &name);
NSLog(@"Processing for key %@ value %s",keyStr,[NSString stringWithCString:name encoding:NSUTF8StringEncoding]);
}
NSLog(@"---------------------------------------------------------------------------------------------");
}
有关一般参考,请参阅: 适用于iPhone / iPad / iO的Fast and Lean PDF Viewer-提示和提示?
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.