checkResourceIsReachableAndReturnError:
Returns whether the resource pointed to by a file URL can be reached.
- (BOOL)checkResourceIsReachableAndReturnError:(NSError **)error
Parameters
- error
- The error that occurred in the case that the resource cannot be reached.
Return Value of [NSURL checkResourceIsReachableAndReturnError]
YES if the resource is reachable; otherwise, NO.
Example of [NSURL checkResourceIsReachableAndReturnError]
NSURL *theURL = [NSURL fileURLWithPath:@"/Users/elisevanlooij/nonexistingfile.php"
isDirectory:NO];
NSError *err;
if ([theURL checkResourceIsReachableAndReturnError:&err] == NO)
[[NSAlert alertWithError:err] runModal];
Example of [NSURL checkResourceIsReachableAndReturnError]
// Add all of the suffixes to the URL and test if it exists
NSString* nameXX = [name stringByAppendingFormat:@"%@%@.%@", scaleSuffix[ss], deviceSuffix[ds], formatSuffix[fs]];
NSURL* testURL = [rootURL URLByAppendingPathComponent:nameXX];
NSLog(@"testing if image exists: %@", testURL);
if([testURL checkResourceIsReachableAndReturnError:nil])
{
imageURL = testURL;
imageScale = scaleValues[ss];
break;
}
