Question

NSBundle *thisBundleb = [NSBundle mainBundle];

pathb = [thisBundleb pathForResource:[a3 objectAtIndex:0] ofType:@"html"];

NSURL   *instructionsURLb = [[NSURL alloc] initFileURLWithPath:pathb];
[webView loadRequest:[NSURLRequest requestWithURL:instructionsURLb]];       

value of [a3 objectAtIndex:0]=index but when i pass like this i am getting
* Terminating app due to uncaught exception ‘NSInvalidArgumentException’, reason: ‘* -[NSURL initFileURLWithPath:]: nil string parameter’**

What I am doing wrong?

Answer 1

pathForResource:ofType: is returning nil, and initFileURLWithPath: is complaining about it. Trap that error like so:

if(nil == pathb) {
    NSLog("Couldn't find object named %@", [a3 objectAtIndex:0]);
} else {
    NSURL   *instructionsURLb = [[NSURL alloc] initFileURLWithPath:pathb];
    [webView loadRequest:[NSURLRequest requestWithURL:instructionsURLb]];          
}

and double check that you’re searching for an object that actually exists in your bundle.