Function Alias in Objective-C

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Category: Error handling | Language: Objective-C

Alias in Objective-C allows a programmer to create an alias (alternative name) for an existing class or method. It can be helpful when you want to refer to a lengthy class name with a shorter one or when you want to provide a more intuitive name for a method.

Here's how you can use alias in Objective-C:

1. Creating an alias for a class:

``objective-c
@class MyLongClassName;

// Define the alias
typedef MyLongClassName MyShortName;

// Use the alias
MyShortName *obj = [[MyShortName alloc] init];

In this example, we define an alias ‘MyShortName for MyLongClassName. Now, we can use MyShortName instead of the full class name.

2. Creating an alias for a method:

objective-c
@interface MyClass : NSObject

// Define the method
- (void)longMethodName:(NSString *)parameter;

@end

// Create an alias for the method
@protocol MyProtocol

@optional
- (void)shortName:(NSString *)parameter;

@end

// Implement the method using the alias
@implementation MyClass

- (void)shortName:(NSString *)parameter
{
[self longMethodName:parameter];
}

@end
``
In this example, we define an alias
shortName for the existing method longMethodName`. Now, we can use the more intuitive name to call the method.

These are just basic examples of how to use alias in Objective-C. It's important to use descriptive names for aliases to avoid confusion with other classes or methods in the program.