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Create NSDictionary based on a URL structure with keys and values
/*
* Example implementation
*/
- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation
{
NSLog(@"Launched with URL: %@", url.absoluteString);
NSDictionary *userDict = [self urlPathToDictionary:url.absoluteString];
//Do something with the information in userDict
return YES;
}
/*
-(NSDictionary *)urlPathToDictionary:(NSString *)path
Takes a url in the form of: your_prefix://this_item/value1/that_item/value2/some_other_item/value3
And turns it into a dictionary in the form of:
{
this_item: @"value1",
that_item: @"value2",
some_other_item: @"value3"
}
Handles everything properly if there is a trailing slash or not.
Returns `nil` if there aren't the proper combinations of keys and pairs (must be an even number)
NOTE: This example assumes you're using ARC. If not, you'll need to add your own autorelease statements.
*/
-(NSDictionary *)urlPathToDictionary:(NSString *)path
{
//Get the string everything after the :// of the URL.
NSString *stringNoPrefix = [[path componentsSeparatedByString:@"://"] lastObject];
//Get all the parts of the url
NSMutableArray *parts = [[stringNoPrefix componentsSeparatedByString:@"/"] mutableCopy];
//Make sure the last object isn't empty
if([[parts lastObject] isEqualToString:@""])[parts removeLastObject];
if([parts count] % 2 != 0)//Make sure that the array has an even number
return nil;
//We already know how many values there are, so don't make a mutable dictionary larger than it needs to be.
NSMutableDictionary *dict = [[NSMutableDictionary alloc] initWithCapacity:([parts count] / 2)];
//Add all our parts to the dictionary
for (int i=0; i<[parts count]; i+=2) {
[dict setObject:[parts objectAtIndex:i+1] forKey:[parts objectAtIndex:i]];
}
//Return an NSDictionary, not an NSMutableDictionary
return [NSDictionary dictionaryWithDictionary:dict];
}
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