Here we are sharing how to Create a file and write in it.
Just copy and paste into .m file in your project
//This is our Writing part:
NSArray *filepath =NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsdirectory=[filepath objectAtIndex:0];
NSLog(@"Document directory>>>%@",documentsdirectory);
NSString *filename=[NSString stringWithFormat:@"%@/myfile.txt",documentsdirectory];
NSString *content=@"One\nTwo\nThree\nFour\nFive";
[content writeToFile:filename atomically:YES encoding:NSStringEncodingConversionAllowLossy error:nil];
//Writting part end.
//This our Reading part
NSArray *path= NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentdir=[path objectAtIndex:0];
NSString *filename=[NSString stringWithFormat:@"%@/myfile.txt",documentdir];
NSString *cont=[[NSString alloc]initWithContentsOfFile:filename usedEncoding:nil error:nil];
NSLog(@"content>>%@",cont);
Reading part end.