NSFileManager creando errore di directory 518 NSFileWriteUnsupportedSchemeError

Question

stavo cercando di creare una directory

NSError*error=nil; 

NSString* BIDirectory=[[NSSearchPathForDirectoriesInDomains(NSCachesDirectory,NSUserDomainMask,YES) objectAtIndex:0] stringByAppendingPathComponent:@"BI"]; 
BOOL isDir,flag=YES; 
    //if the directory doesn't exist create it. 
if(!([[NSFileManager defaultManager] fileExistsAtPath:BIDirectory isDirectory:&isDir]&& isDir))  
    flag=[[NSFileManager defaultManager] createDirectoryAtURL:[NSURL URLWithString:BIDirectory] withIntermediateDirectories:YES attributes:nil error:&error]; 

ho ottenuto il seguente errore

enter code hereError Domain=NSCocoaErrorDomain Code=518 "The operation couldn’t be completed. (Cocoa error 518.)" UserInfo=0x197190 {NSURL=/var/mobile/Applications/55793654-6CDB-4B07-8FBF-553DC37D583D/Library/Caches/BI} 

forse l'url è sbagliato?

Answer 1

Invece di

[NSURL URLWithString:BIDirectory] 

utilizzare

[NSURL fileURLWithPath:BIDirectory] 

suo sbagliato usare URLWithString: BIDirectory su file locali