IOS intro-write File

#import <sys/xattr.h>

+ (NSString *) getfullfilepathindocuments: (NSString *) subfilepath filename: (NSString *) filename
{
NSString *filepath = [NSString stringwithformat:@ "%@/documents%@", Nshomedirectory (), Subfilepath];
NSLog (@ "Function:%s,getfilepath%@", __function__,filepath);
nsfilemanager* fm = [Nsfilemanager Defaultmanager];
if ([FM Fileexistsatpath:filepath]) {
return [NSString stringwithformat:@ "%@/%@", FilePath, FileName];
}
if ([FM Createdirectoryatpath:filepath
Withintermediatedirectories:yes
Attributes:nil
Error:nil])
{
u_int8_t B = 1;
Setxattr ([FilePath filesystemrepresentation], "Com.apple.MobileBackup", &b, 1, 0, 0);
return [NSString stringwithformat:@ "%@/%@", FilePath, FileName];
}
return nil;
}

Self.mfile = [magicentity getfullfilepathindocuments:@ "/test" filename:@ "Yuv.bin"];

NSData *data = [[NSData alloc] initwithbytes:i420 length:w * h * 3/2];
BOOL R = [data writeToFile:self.mFile atomically:true];

IOS intro-write File