How do you find the value of NSDictionary?

NSMutableArray *getdata=[[NSMutableArray alloc]init]; getcat=[results objectForKey:@”data”];

Is NSDictionary ordered?

NSDictionary keys & values are not ordered.

What is the difference between NSDictionary and NSMutableDictionary?

Dictionary contains an array,and that array contains dictionary. Main Difference is: NSMutableDictionary is derived from NSDictionary, it has all the methods of NSDictionary. NSMutableDictionary is mutable( can be modified) but NSDictionary is immutable (can not be modified).

How do you convert NSDictionary to NSMutableDictionary?

4 Answers. Use -mutableCopy . NSDictionary *d; NSMutableDictionary *m = [d mutableCopy]; Note that -mutableCopy returns id ( Any in Swift) so you will want to assign / cast to the right type.

How do you typecast in Objective-C?

A variable from one data type can be converted to another data type using Type casting. Values from one type can be converted into other explicitly using castoperator. For example, If a long value need to be stored in a simple integer then you can type cast long into int.

How to create NSDictionary object in Objective-C?

In addition to the provided initializers, such as init (objects:forKeys:), you can create an NSDictionary object using a dictionary literal. In Objective-C, the compiler generates code that makes an underlying call to the init (objects:forKeys:count:) method.

Where are NSNumber and NSString stored in Objective-C?

In Objective-C , NSDictionary is the most common used class. In NSDictionary, Entries are stored in the form of key value pairs. A Dictionary can hold NSNumber, NSString, NSArray, ..etc and their mutable objects.

Which is the most common class in Objective-C?

In Objective-C , NSDictionary is the most common used class. In NSDictionary, Entries are stored in the form of key value pairs. A Dictionary can hold NSNumber, NSString, NSArray, ..etc and their mutable objects. Below is the simple Dictionary in JSON format. A bit complex Dictionary is below.

How are dictionary literals generated in Objective-C?

In Objective-C, the compiler generates code that makes an underlying call to the init (objects:forKeys:count:) method. Unlike dictionaryWithObjectsAndKeys: and other initializers, dictionary literals specify entries in key-value order.