Get MIME type of an ALAsset

问题

Is there a way how to get MIME type for ALAsset? There is a nice method for metadata:

NSDictionary *data = [[asset defaultRepresentation] metadata];

But that doesn't contain MIME type data...

回答1:

ALAssetRepresentation *rep = [asset defaultRepresentation];

NSString* MIMEType = (__bridge_transfer NSString*)UTTypeCopyPreferredTagWithClass
             ((__bridge CFStringRef)[rep UTI], kUTTagClassMIMEType);

This will give you the MIME type. You need to add MobileCoreService framework and import <MobileCoreServices/MobileCoreServices.h>

来源：https://stackoverflow.com/questions/22351587/get-mime-type-of-an-alasset