Saving CSV file to documents directory folder - ios

Question

I am writing a registration app that is supposed to save a CSV file in the documents directory folder. I would like to look at the output and see what happens when I open the CSV file in excel. I navigated to the documents directory folder by finding out where it should be saved using this code snippet:
NSLog(#"Info Saved");
NSLog(#"Documents Directory: %#", [[[NSFileManager defaultManager]
URLsForDirectory:NSDocumentDirectory
inDomains:NSUserDomainMask] lastObject]);
Here is my code for saving the information put into the 11 text fields in the registration form:
- (IBAction)saveFormButton:(id)sender {
// saves text field data in comma separated CSV file format
NSString *formData = [NSString stringWithFormat:#"%#,%#,%#,%#,%#,%#,%#,%#,%#,%#,%#\n",
self.nameTextfield.text, self.emailTextfield.text,
self.phoneTextfield.text, self.termTextfield.text,
self.schoolTextfield.text, self.graduationTextfield.text,
self.gpaTextfield.text, self.degreeTextfield.text,
self.interestTextfield.text, self.groupTextfield.text,
self.appliedTextfield.text];
// get document directory path
NSString *documentDirectoryPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
NSUserDomainMask, YES)objectAtIndex:0];
// append results.csv onto doc path
NSString *event = [documentDirectoryPath stringByAppendingString:#"results.csv"];
// creates folder if it does not exist
if (![[NSFileManager defaultManager] fileExistsAtPath:documentDirectoryPath]) {
[[NSFileManager defaultManager] createFileAtPath:event contents:nil attributes:nil];
}
NSFileHandle *fileHandle = [NSFileHandle fileHandleForUpdatingAtPath:event];
[fileHandle seekToEndOfFile];
[fileHandle writeData:[formData dataUsingEncoding:NSUTF8StringEncoding]];
[fileHandle closeFile];
Should I be seeing a file in that specific folder I have navigated to?
Thank you for your help,

Answer 1

Change this line:
NSString *event = [documentDirectoryPath stringByAppendingString:#"results.csv"];
to:
NSString *event = [documentDirectoryPath stringByAppendingPathComponent:#"results.csv"];
This makes sure that the path is correctly formatted. Also, you seem to be checking to see if "documentDirectoryPath" exists before creating the file rather than the filename itself. Change:
if (![[NSFileManager defaultManager] fileExistsAtPath:documentDirectoryPath]) {
[[NSFileManager defaultManager] createFileAtPath:event contents:nil attributes:nil];
}
to:
if (![[NSFileManager defaultManager] fileExistsAtPath:event]) {
[[NSFileManager defaultManager] createFileAtPath:event contents:nil attributes:nil];
}

Answer 2

Here is a more elegant way with less code
// Content of file
NSString* str= #"str,hey,so,good";
// Writing
NSString *root = [NSHomeDirectory() stringByAppendingPathComponent:#"file.csv"];
[str writeToFile:root atomically:YES encoding:NSUTF8StringEncoding error:NULL];
// Reading
NSString *string = [[NSString alloc] initWithContentsOfFile:root encoding:NSUTF8StringEncoding error:nil];
NSLog(#"%#",string);
The result:
2015-07-15 15:52:56.267 ObjC[2927:15828] str,hey,so,good