yql-ios is an Objective-C library that provides YQL connectivity for your iOS applications.
YQL (Yahoo! Query Language) is an expressive SQL-like language that lets you query, filter, and join data across Web services. With YQL, apps run faster with fewer lines of code and a smaller network footprint.
Import YQL.h and YQL.m into your project. Use the query method to invoke YQL, passing the desired query as a parameter:
NSDictionary *results = [yql query:@"SELECT * FROM weather.forecast WHERE woeid=2502265"];
You will get a NSDictionary object containing the results. The structure of this dictionary is the same you would get from a query in the YQL console. You can use valueForKeyPath to access the desired data in the results structure:
NSLog(@"%@", [[results valueForKeyPath:@"query.results"] description]);
This repository is an Xcode project that mimics the YQL console. You can run it on Xcode to see how it works.