Function Block binding in Objective-C

Block binding in Objective-C is a technique that allows you to declare and define an anonymous function (block) within your code and assign it to a variable. This allows you to pass the block around as an argument to other functions and use it as a callback.

Here's an example of how to use block binding in Objective-C:

``objective-c // Declare a block int (^addBlock)(int, int);


// Define the block

addBlock = ^(int a, int b) {

    return a + b;

};
// Call the block

int sum = addBlock(2, 3);
NSLog(@"The sum is %d", sum); // Output: The sum is 5



In the example above, we declare a block called addBlock that takes two int arguments and returns an int. We then define the block using the block syntax ^(int a, int b) { ... } and assign it to the variable addBlock. Finally, we call the block with the arguments 2 and 3 and assign the result to the variable sum. The output of the NSLog statement is The sum is 5.
Here's another example that demonstrates passing a block as an argument:
objective-c

// Define a function that takes a block as an argument

void printResult(int (^operation)(int, int), int a, int b) {

    int result = operation(a, b);

    NSLog(@"The result is %d", result);

}
// Call the function with a block

printResult(^(int a, int b) {

    return a * b;

}, 4, 5);

// Output: The result is 20`

In this example, we define a function called printResult that takes a block as its first argument. The block takes two int arguments and returns an int. Inside the function, we call the block with the arguments a and b, and assign the result to the variable result. We then log the result using NSLog.

Finally, we call the printResult function with a block that multiplies its two arguments, 4 and 5, using the block syntax ^(int a, int b) { return a * b; }. The output of the NSLog statement is The result is 20`.

Function Block binding in Objective-C

See this concept in other languages