NSString stringWithContentsOfURL usedEncoding error example ios

stringWithContentsOfURL: usedEncoding: error:

Returns a string created by reading data from a given URL and returns by reference the encoding used to interpret the data.

+ (id)stringWithContentsOfURL:(NSURL *)url usedEncoding:(NSStringEncoding *)enc error:(NSError**)error

Parameters

url

The URL from which to read data.

enc

Upon return, if url is read successfully, contains the encoding used to interpret the data.

error

If an error occurs, upon returns contains an NSError object that describes the problem. If you are not interested in possible errors, you may pass in NULL.

Return Value[ NSString stringWithContentsOfURL usedEncoding error example ]

A string created by reading data from url. If the URL can’t be opened or there is an encoding error, returns nil.

Discussion

This method attempts to determine the encoding at url.

[ NSString stringWithContentsOfURL usedEncoding error example ]

NSStringEncoding encoding;
NSError *error;
NSString *string = [NSString stringWithContentsOfURL:
                               [NSURL URLWithString:@"http://www.google.com/"] 
                                       usedEncoding:&encoding
                                              error:&error];

NSLog(@"html = %@",string);

[ NSString stringWithContentsOfURL usedEncoding error example ]

    NSStringEncoding encoding;
    NSString *pageData = [NSString stringWithContentsOfURL:url usedEncoding:&encoding error:NULL];
    NSLog(@"Encoding %d",encoding);(Note: NSUTF8StringEncoding = 4)

[ NSString stringWithContentsOfURL usedEncoding error example ]

...
CFErrorRef error = NULL;
CFURLRef fileURL = CFBundleCopyResourceURL(bundle,
                                           CFSTR("file"),
                                           CFSTR("txt"),
                                           NULL);

// Ugly piece of objc code in my whole C source file :(
NSError *nsError = (__bridge NSError *)(error);
NSString *nsString = [NSString stringWithContentsOfURL:(__bridge NSURL *)fileURL
                                          usedEncoding:NULL
                                                 error:&nsError];

CFStringRef fileContents = (__brigde CFStringRef)nsString; 
...