Objective-C Programming: The Big Nerd Ranch Guide

Dot notation

Objective-C programmers call accessor methods a lot. When properties were introduced, Apple also introduced a shorthand dot notation for calling those accessors.

Many Objective-C programmers prefer dot notation because it is easier to type. In main.m, try out dot notation:

int main(int argc, const char * argv[])
{
    @autoreleasepool {

        // Create an instance of BNRPerson
        BNRPerson *mikey = [[BNRPerson alloc] init];

        // Give the instance variables interesting values using setters
        [mikey setWeightInKilos:96];
        [mikey setHeightInMeters:1.8];
        mikey.weightInKilos = 96;
        mikey.heightInMeters = 1.8;

        // Log the instance variables using the getters
        float height = [mikey heightInMeters];
        int weight = [mikey weightInKilos];
        float height ...