Issue with NSTask (probably very simple)

[uberamd]

I am writing a GUI application that calls the command line utility /usr/bin/xmllint. I am going to grab the output from the command and display it, however I am having issues getting it to even execute properly. Here is my code chunk:


-(IBAction)validateButtonClicked:(id)sender
{
NSString* xsdValue = [xsdPathBar stringValue];
NSString* xmlValue = [xmlPathBar stringValue];
if( [xsdValue isEqualToString:@""] || [xmlValue isEqualToString:@""] )
{
[outBox setStringValue:@"You must select both an XML file and XSD file"];
} else {

NSString* xmllintArgs = [NSString stringWithFormat:@"--noout --schema %@ %@", xsdValue, xmlValue];
NSLog(@"%@", xmllintArgs);

NSTask *xmllint;
xmllint = [[NSTask alloc] init];
[xmllint setLaunchPath:@"/usr/bin/xmllint"];
[xmllint setArguments:[NSArray arrayWithObjects:(NSString*)xmllintArgs, NULL]];
[xmllint launch];

[xmllint release];
xmllint = nil;

[outBox setStringValue:@"OK!"];
}
}


Here is the console output:


Unknown option --noout --schema /real/path/to/file/BooksSchema.xsd /real/path/to/file/Books.xml
Usage : /usr/bin/xmllint [options] XMLfiles ...
Parse the XML files and output the result of the parsing
--version : display the version of the XML library used
--debug : dump a debug tree of the in-memory document
--shell : run a navigating shell
--debugent : debug the entities defined in the document
--copy : used to test the internal copy implementation
.... etc ....


However when I copy and paste the EXACT same command in terminal it works perfectly:


Steves-MacBook-Pro:~ morri534$ /usr/bin/xmllint --noout --schema /real/path/to/file/BooksSchema.xsd /real/path/to/file/Books.xml
/real/path/to/file/Books.xml validates
Steves-MacBook-Pro:~ morri534$



Can anyone diagnose what may be wrong with my code that is causing it to fail on me?

[JoshDC]

Each argument has to be a separate object in the NSArray, that is the arguments should be [NSArray arrayWithObjects:@"--noout", @"--schema", xsdValue, xmlValue, nil];

[uberamd]

That works perfectly, thank you! Makes sense now that I think about it. I am almost done with this but I am having one more issue with the UI.

I have a NSTextField (outBox) inside of a NSScrollView. I set the contents of the outBox to the output string, however that allows the scroll view to horizontal scroll. Is there any way to restrict the ScrollView from horizontally scrolling? I would like it to instead wrap the text and just vertically scroll.

Currently my code is:


[outBox setStringValue:output];
[outBox sizeToFit];


I understand why it is doing the HZ scroll, because I am calling sizeToFit, but I cant figure out any other way to make the outBox NSTextField only vertically resize and wrap text. Any help would be appreciated.

[jared_kipe]

I'm unfamiliar with the NSTextField but in UITextFields in interface builder, you select the text box and in the properties there are checkboxes for Horizontal scroll, Vertical scroll, scroll enabled... I just set them to have vertical scroll and scroll enabled. Then when I paste in long lines they just wrap to the next line.