问题
I have a Symfony2 project serving both a JQuery Web client and an Objective C iPhone APP.
JQuery sends properly its urlencoded data to the server. Data that is properly accessed in the Symfony2 Controller using $this->getRequest()->get('myKey');.
Therefor, data is sent in application/x-www-form-urlencoded.
In order not to change my Symfony Controllers (that happens to be the the whole API of my system and has around 200 AJAX calls in the form I described before), I'd like the Objective C to send the data exactly in the same way.
I have it partially gotten. I mean, I know how to convert a simple NSDictionary to a URI parameters format. This would be the code (Thanks to Michael Sivolobov).
NSMutableArray* parametersArray = [[[NSMutableArray alloc] init] autorelease];
[dict enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {
[parametersArray addObject:[NSString stringWithFormat:@"%@=%@", key, obj]];
}];
NSString* parameterString = [parametersArray componentsJoinedByString:@"&"];
But my problem know is to know how to convert in a similar way some more complex data. Such as nested NSArrays and NSDictionarys (very usual when working with JSON). Anybody knows any method to convert such data to URL (key1=value1&key2=value2, etc...) in Objective C??
EDIT: example of the data I'd need to send by url.
NSArray *myArray = [NSArray arrayWithObjects: @"Value2", @"Value3", nil];
NSDictionary *myDict = [NSDictionary dictionaryWithObjectsAndKeys: @"Value1", @"key1", myArray, @"Value2"];
Something that in JSON would be {"key1": "value1", "key2": ["value2", "value3"]}
What is the best way in Objective C to get that structure and convert it to URLencode before passing it to the Http POST? I thought there would be some JSON or Cocoa method... but there is nothing...
回答1:
Holy Cow! I had to dust off some really old PHP knowledge for this: http_build_query().
The format of a complex mixed dictionary/array objects is base[key][key]…[key]=value
For the JSON {"key1": "value1", "key2": ["value2", "value3"]}, PHP would expect key1=value1&key2[0]=value3&key2[1]=value3 as a URL encoded string (so key1=value1&key2%5B0%5D=value3&key2%5B1%5D=value3).
For a more complex example: {"x": {"y": ["a", "b"]}, "z" : "c"}, PHP would expect x[y][0]=a&x[y][1]=b&z=c.
来源：https://stackoverflow.com/questions/17166931/objective-c-how-to-convert-nested-nsdictionarys-and-nsarrays-to-urlencoded-stri