iphone - 如何从下载的图像中获取Exif数据

Question

在我的应用程序中，我需要从特定的URL链接下载图像并将其分配给UIImageView。我没有将该图像存储到我的媒体库中，那么在这种情况下，如何在我的应用程序中获取该图像(例如EXIF_TAG_CREATE_DATE，EXIF_TAG_ARTIST等)的 Exif数据？

Answer 1

try this  

NSError *error = nil;
NSDictionary *attributes = [[NSFileManager defaultManager] 
    attributesOfItemAtPath:@"imagePath" error:&error];

if (!error) 
{
    NSLog(@"file attributes : %@",attributes);
}

and this is the result :

NSFileCreationDate = "2013-05-28 09:29:37 +0000";
NSFileExtensionHidden = 0;
NSFileGroupOwnerAccountID = 20;
NSFileGroupOwnerAccountName = staff;
NSFileModificationDate = "2013-05-28 09:29:37 +0000";
NSFileOwnerAccountID = 502;
NSFileOwnerAccountName = lerhan;
NSFilePosixPermissions = 420;
NSFileReferenceCount = 1;
NSFileSize = 1494;
NSFileSystemFileNumber = 46795419;
NSFileSystemNumber = 234881026;
NSFileType = NSFileTypeRegular;

to access any data type NSLog(@"file creation date : %@",[attributes objectForKey:@"NSFileCreationDate"]);