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"

CAn u give ur code with some more details like urlToGrab belongs to Wat kind of DataType — EXC_BAD_ACCESS
– EXC_BAD_ACCESS, Commented Nov 14, 2011 at 3:46
How do you expect to get a NSURL from the +stringWithFormat: method? — Caleb
– Caleb, Commented Nov 14, 2011 at 3:51

dimme · Accepted Answer · 2023-10-18 10:06:39Z

57

This is how you create an NSURL from an NSString:

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

edited Oct 18, 2023 at 10:06

answered Nov 14, 2011 at 3:50

dimme

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1 Comment

jomafer Over a year ago

NSURL is an object, so you are missing the *. NSURL *url

josliber · Accepted Answer · 2015-07-17 13:42:27Z

3

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

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

edited Jul 17, 2015 at 13:42

josliber

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answered Jul 17, 2015 at 11:44

swapnali patil

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Comments

HangarRash · Accepted Answer · 2023-10-18 16:20:22Z

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.

Mogsdad · Accepted Answer · 2016-03-10 03:38:53Z

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://

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