objective C: write in a csv (txt) string contained

Question

In my project I have a view where I write words in some textfield, when I press a button these string must be stored in a csv file as this example: (example with 5 textfield)

firststring#secondstring#thirdstring#fourthstring#fifthstring;

this is an example of the result that I want. How can I do?

_{Edited to add:}

code for the string

 NSMutableString *csvString = [NSMutableString stringWithString:textfield1.text];
[csvString appendString:@"#"];
[csvString appendString:textfield2.text];
[csvString appendString:@"#"];
[csvString appendString:dtextfield3.text];
[csvString appendString:@"#"];
[csvString appendString:textfield4.text];
[csvString appendString:@"#"];
[csvString appendString:textfield5.text];
[csvString appendString:@"#"];
[csvString appendString:textfield6.text];
[csvString appendString:@"#"];
[csvString appendString:textfield7.text];
[csvString appendString:@"#"];
if (uiswitch.on) { //switch
    [csvString appendString:@"1"];
}
else [csvString appendString:@"0"];
[csvString appendString:@";"];

finally csvString

NSLog(@"string = %@", csvString);

is exactly my string

Answer 1

Per the NSString Class Reference the error parameter should be NULL not nil in the writeToFile method, if you do not want to capture error details.

NSString Class Reference

Check the return value of the writeToFile method, if it returns NO there was an error writing to the file or the encoding:

BOOL result = [csvString writeToFile:pathToFile atomically:YES encoding:NSUTF8StringEncoding error:NULL];
NSLog(@"Result of writeToFile: %@", result ?@"YES":@"NO");