NSString to NSURL?

Question

Trying to convert a string to NSURL and this is not happening.

barcodeTextLabel.text = foundCode.barcodeString;
urlToGrab = [NSString stringWithFormat:@"%@", foundCode.barcodeString]; // foundCode.barcodeString is an NSString

urlToGrab shows the following "error invalid CFStringRef"

Answer 1

This is how you create an NSURL from an NSString:

NSURL *url = [NSURL URLWithString:@"http://www.google.com"];

Answer 2

You can use following for creating the file path to url.

NSURL *yourURL = [NSURL fileURLWithPath:@"/Users/xyz/Desktop/abc.sqlite"];

Answer 3

If foundCode.barcodeString is the string you want as your URL, then (like the above answer) use the NSURL class method URLWithString:(NSString *).

Your code should look like:

NSURL urlToGrab = [NSURL URLWithString:foundCode.barcodeString];

Where is your error coming into to play? The way your code is, urlToGrab is an instance of NSString. I would imagine you would get an error like you described if you tried to make an HTTP request on an NSString rather than NSURL.

Answer 4

Swapnali patil's answer works, but I will add an explanation.

You will get a nil if the format of NSString doesn't fit file criteria for NSURL (file:///xxx/file.ext).

My needs were with loading a JPG image via URL file path to nsdata; NSURL * u=[[NSURL alloc] initWithString:fpath] returned nil, but NSURL *yourURL = [NSURL fileURLWithPath:fpath] as in mentioned answer worked. A URL for files will be file:///users/xxx/pic.jpg format and give disk access. NSURL * u=[[NSURL alloc] initWithString:(NSString*) ] will also give nil object if nsstring is web URL but if missing http://