Steve

[...] in certain situations for the existing class. An example of a category implementation on a base class:  First we need to create a base class. Below is a class called College. After you’ve created [...]

[...] hides the details of what it’s going on because you are just building on the interface of the base class(super class) and the ability to reuse the code. There are two types of polymorphism: Compile [...]

[...] is “Many forms or Many types”.  In OOP world, it means different classes share the same method name with different implementation and those classes are related by inheritance. In other words, [...]

[...] advantage of using Categories is that you can add methods to any existing class as long as the method name is different than the existing class method name. If you want to override methods, then you [...]

[...] a way where other objects can interact with your object data.  Now, what if your setter and getter methods in the class can be automatically generated for you by the compiler? The way to achieve this [...]

[...] a Person class .h file before using @property directive Below is the Person class .h file after using @property directive Below is the Person Class [...]

[...] for each delegate is to allow users to dismiss the message composition interface under certain situations. Example of implementing the Email Interface using MFMailComposeViewController Example of [...]

[...] Category allows you to add functionality or behaviors that you think its useful in certain situations for the existing class. An example of a category implementation on a base class:  [...]

[...] . Below is the Main.M file with Category Another way to implement this is to use the Category template in the XCode. Everytime you want to add a new category to your Xcode project, all you need [...]

[...] with @property directive looked a lot easier to read, but there’s one problem with the default setter method and the problem is that it’s not sufficient enough to cover all the scenarios that you [...]

[...] to reuse the code. There are two types of polymorphism: Compile time polymorphism and run-time polymorphism. In objective-C, it’s more about the run-time polymorphism which is method overriding. [...]

[...] you think its useful in certain situations for the existing class. An example of a category implementation on a base class:  First we need to create a base class. Below is a class called [...]

[...] is to create a new file.  Next, click on Cocoa Touch under iOS and then choose Objective-C category template. After you clicked Next button,  a new window appears with two options: [...]