[mooty]

Hi All,

I am trying to write my first text application in cocoa... I have got a working app from an Apple tutorial, however when saving, it uses the following:

- (NSData *)dataRepresentationOfType:(NSString *)aType{	NSData *data;    [self setString:[textView textStorage]];    data = [NSArchiver archivedDataWithRootObject:[self string]];    return data;}

Which saves the content as not plain text. Is there anyway I can change the above to save as plain text ?

Any help / direction would be great! Thanks,

[chucker]

Here's an IBAction that pulls up a save panel to ask the user for the destination, then stores a text file with the string textualOutput there:

234	- (IBAction)saveTextualOutput:(id)sender235	{236	#pragma unused(sender)237	        NSSavePanel * savePanel;238	        int runResult;239	240	        savePanel = [NSSavePanel savePanel];241	242	        [savePanel setRequiredFileType:@"txt"];243	244	        // TODO: auto-renaming, e.g. "filename 1.txt"?245	        runResult = [savePanel runModalForDirectory:246	                [NSHomeDirectory() stringByAppendingPathComponent:@"Desktop"] file:247	                NSLocalizedString(@"MenuTemperature Report",248	                @"MenuTemperature Report")];249	250	        if (runResult == NSOKButton)251	                [[textualOutput dataUsingEncoding:NSUTF8StringEncoding]252	                        writeToFile:[savePanel filename] atomically:YES];253	}

The main piece, of course, is the very last line, which calls - [NSString dataUsingEncoding:] on the NSString, then - [NSData writeToFile: atomically:] on the resulting NSData.

[mooty]

Cheers Chucker!!

How about this one?

I have an NSString variable like so:

NSString *filename = @"/Users/Me/whatever.txt";

I am trying to join that variable with a string like so:

NSString *newFilename = (@"file://%c", filename);

But all that does is give newFilename the value of filename. Obviously I am missing a trick here :-) any help is goooood! :-)

Thanks!

[chucker]

You could do:

NSString * newFilename = [@"file://" stringByAppendingString:filename];

Or, more like the way you wanted it:

NSString * newFilename = [NSString stringWithFormat:@"file://%@", filename];

%c is for C strings; %@ is for objects (including NSStrings).

There's also a stringByAppendingPathComponent method.

Lastly, what you're doing actually isn't necessary; filename is already a complete absolute path, at least in your particular example. You could turn it into a file:// URL if you wanted to, but it's not necessary (although I believe Apple is slowly trying to migrate over to using paths everywhere, but that shouldn't concern you until like 10.6).

If you want to go from @"/Users/Me/whatever.txt" (a path) to a URL, use [NSURL fileURLWithPath:@"/Users/Me/whatever.txt"]; , and to go backwards, use [NSURL path].

[mooty]

Originally Posted by chucker If you want to go from @"/Users/Me/whatever.txt" (a path) to a URL, use [NSURL fileURLWithPath:@"/Users/Me/whatever.txt"]; , and to go backwards, use [NSURL path].

EXACTLY what I needed! :-) thats shortened my code considerably too :-) Thanks Chucker!

Okay, next question :-) hehe

I have my variable and search term:

NSString *filename = @"User/Me/Files/whatever.jpg";NSString *searchTerm = @"Me/Files";

How can I search filename for my searchTerm ?

Also, can I split filename up into seperate array items or something, by the / character ?

Thx again for any advice!

[chucker]

[filename rangeOfString:searchTerm]

will return an NSRange of the first occurrence. To check if there is at least one occurrence, you could try (I haven't tested this!):

if ([filename rangeOfString:searchTerm].location != NSNotFound) {}

There may be an easier way.

[mooty]

thanks chucker...

I have split my filename up into an array... how do i access the values? I tried arrayName[2] but that doesn't seem to go good! :-)

[chucker]

No, that would be for C arrays.

[someArray objectAtIndex:2];

is the Cocoa equivalent.

[someArray count];

gives you an integer of how many items the array has.

If you want to modify the array later on, you need to use NSMutableArray.

[mooty]

thanks Chucker!! You're being a great help here...

I currently have the following:

NSString *filenameString = @"User/Me/Blah/hello.html";NSArray *theComponents = [filenameString pathComponents];int i = 1;int theComponentsCount = [theComponents count];NSString *newFilename = @"";						while (i < theComponentsCount) {			if ([theComponents objectAtIndex:i] == @"Blah") {//Do Nothing} else {// Add to my new stringnewFilename = [NSString stringWithFormat:@"%@ NO MATCH", newFilename];}				i = i + 1;}

theComponents splits my filename into seperates:
[0]/
[1]User
[2]Me
[3]Blah

etc, but my if clause never matches key [3] with the string "Blah"... why god why!????

All I am trying to achieve is if the filename contains "Blah", get rid of it so we are left with "/Users/Me/hello.html"

But it shouldnt matter where "Blah" is..

[Brad]

Originally Posted by mooty theComponents splits my filename into seperates: [0]/ [1]User [2]Me [3]Blah

Are you sure about this? Double-check that it actually does what you think it does.

[mooty]

when i put the values of the keys into a textfield, they show as above...

[chucker]

First, technically, the Cocoa way of doing things is to use an NSEnumerator here, not an integer iterator. Shouldn't matter though and I can't be bothered to look it up right now

Second,

if ([theComponents objectAtIndex:i] == @"Blah")

is not an object comparison (I think this may, in fact, be your problem). You'd use

if ([[theComponents objectAtIndex:i] isEqualTo:@"Blah"])

or, since this is a string, better yet:

if ([[theComponents objectAtIndex:i] isEqualToString:@"Blah"])

Finally, and more relevant to your problem: I'd insert a few 'NSLog's to trace down what's going wrong. It's a very simple macro but can prove very powerful in tracking down mistakes. I have modified your code accordingly.

NSString *filenameString = @"User/Me/Blah/hello.html";NSArray *theComponents = [filenameString pathComponents];NSLog(@"Complete array: %@, with %i items", theComponents, [theComponents count]);int i = 1;int theComponentsCount = [theComponents count];NSString *newFilename = @"";						while (i < theComponentsCount) {NSLog(@"Current object: %@", [theComponents objectAtIndex:i]);if ([[theComponents objectAtIndex:i] isEqualToString:@"Blah"]) {//Do Nothing} else {// Add to my new stringnewFilename = [NSString stringWithFormat:@"%@ NO MATCH", newFilename];}				i = i + 1;}

Run it, and check console.log or STDOUT for log messages. If you're still unsure where the problem lies, post the output here.

[chucker]

NSString *filenameString = @"User/Me/Blah/hello.html";NSArray *theComponents = [filenameString pathComponents];NSEnumerator *ourEnumerator = [theComponents objectEnumerator];NSObject *currentObject;NSLog(@"Complete array: %@, with %i items", theComponents, [theComponents count]);NSString *newFilename = @"";						while (object = [enumerator nextObject]) {NSLog(@"Current object: %@", object);if ([[theComponents objectAtIndex:i] isEqualToString:@"Blah"]) {//Do Nothing} else {// Add to my new stringnewFilename = [NSString stringWithFormat:@"%@ NO MATCH", newFilename];}}

Untested, mind you, but this is pretty much the equivalent code only using NSEnumerator.

[mooty]

that was it!! :-) IsEqualToString! Sorry I am still trying to get the hang of all this coming from PHP and .NET :-)