Question

I´m trying to open an URL with UIApplication, but when I run:

[[UIApplication sharedApplication] canOpenURL:urlToUpdate

The url is created with a String and

NSString *urlStringToOpenEscaped = [urlStringToOpen stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

NSURL *urlToUpdate = [NSURL URLWithString:urlStringToOpenEscaped];

Always returns FALSE.

I checked the URL is accessible from the iPad.

Any idea?

Answer 1

The canOpenURL method is not meant to be used in order to test if a network url is reachable. According to the documentation:

This method guarantees that that if openURL: is called, another
application will be
launched to handle it. It does not guarantee that the full URL is valid.

So, it’s a way of knowing if the resource specified by the url passed to the method, can be accessed/opened by an application on the system.

If you want to check whether a web address is reachable or not you’ll have to execute the request and then handle the result in the response.