Question

I’m trying to write a string to a file and store that in the applicationSupport folder within my app. But my NSLog() statement doesn’t log anything in the debugger. I have tried to go through it with the debugger, and i can see that the content is nil, so i’m guessing that’s why it’s not outputting anything, but i don’t know why it’s set to nil. Can anybody see my mistake?

 NSString *document = [[[[[[[[description stringByAppendingString:@" "]stringByAppendingString:focus]stringByAppendingString:@" "]stringByAppendingString:level]stringByAppendingString:@" "]stringByAppendingString:equipment]stringByAppendingString:@" "]stringByAppendingString:waterDepth];
//NSLog(@"%@", document);

//get the documents directory:
NSArray *paths = NSSearchPathForDirectoriesInDomains
(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *supportDirectory = [paths objectAtIndex:0];

//filename
NSString *filename = [NSString stringWithFormat:[_nameTextField.text stringByAppendingString:@".txt"], supportDirectory];

[document writeToFile:filename atomically:NO encoding:NSStringEncodingConversionAllowLossy error:nil];

NSString *content = [[NSString alloc]initWithContentsOfFile:filename usedEncoding:nil error:nil];
NSLog(@"%@", content);

Answer 1

filename is wrong. It should have the following format: "directory/file.extension". You can use the methods stringByAppendingPathComponent and stringByAppendingPathExtension to construct such a string.

NSString *filename = [supportDirectory stringByAppendingPathComponent:[_nameTextField.text stringByAppendingPathExtension:@"txt"]];

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Also, as a side note, the first line should be rewritten using stringWithFormat like this:

NSString *document = [NSString stringWithFormat:@"%@ %@ %@ %@ %@", description, focus, level, equipment, waterDepth];