获取ALAsset的MIME类型

Question

有没有办法获取ALAsset的MIME类型？有一个很好的元数据方法：

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

但这并不包含MIME类型数据......

Answer 1

ALAssetRepresentation *rep = [asset defaultRepresentation];

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

这将为您提供MIME类型。您需要添加MobileCoreService框架并导入<MobileCoreServices/MobileCoreServices.h>