@Binding - data between views

Sat, 05 Nov 2022 00:00:00 +0000

In C world, if we want to pass a parameter down into a functional call, and allow the receiving function to change it’s value, we’d pass a pointer to the variable. Something like this:

#include <stdio.h>
#include <stdlib.h>

void increment(int* b) {
 *b=*b+1;
}

int main() {
 int a = 5;
 increment(&a);
 printf("%d", a);
 return 0;
}

// prints '6'

For youngsters, what’s happening is that we’ve set the value of a to 5, then passed the memory address of a into the increment() function. That’s what the @a means.

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@Binding - data between views