can not access e-mail attachment

I used the code below to get the email attachment file url.

NSURL *url=(NSURL*)[launchOptions valueForKey:UIApp开发者_如何学ClicationLaunchOptionsURLKey];

but

bool b=[[NSFileManager defaultManager] fileExists:[url absoluteString];

always returns NO, which means the email attachment file does not exist.

Welcome any comment

Don't you want to use

 bool b=[[NSFileManager defaultManager] fileExists:[url path];

rather than sending the NSURL instance an absoluteString message?

you could not access/Open the attachment in your application but you could open iphone/ipad email client and add an attachment into.

Only the file can be accessed in application which are the part of your application sandbox.