Basic Objective-C and objectivec tutorials

Basic Objective-C and objectivec tutorials

ObjectForKey: Return id type,
Converts the NSInteger type to integerValue.

// NewDictionary is an NSDictionary defined somewhere // newArray is an NSArray defined dictionary = [[newDictionary objectForKey: @ "question_id"] integerValue]; NSInteger questionId = [[newArray objectAtIndex: index] integerValue];

Just to be clear, the compiler won't complain about sending any message to an id, instead if the object isn't really an object (a struct or primitive ), or doesn't respond to that message, you'll get an exception at runtime (not at build ).

Copyright Disclaimer: This article is an original article by the blogger and cannot be reproduced without the permission of the blogger.