Objective-C on the Mac L5 - Methods

How to call methods in Objective-C.

Category:

Howto & Style

Tags:

• mac
• apple
• programming
• tutorial
• lesson
• lecture
• objective-c
• cocoa
• os
• xcode
• iphone
• beginner
• beginners
• software
• howto
• appleprogramming

[findthebug]

good stuff, thanks

[AppleProgramming]

@findthebug You're welcome

[RMH1565]

So there always is a plain init method with every class. In Java I always had to define a constructor, even if it was empty.

[AppleProgramming]

@RMH1565 Ya, in Obj-C the init method is just a method used to initialize your instance variables. There are 2 tutorials later on in this series that go into more depth about how the initializers work.

[eenfach]

Hi Lucas,

@Objective-C on the Mac L5 - Methods

i am just trying to build the program in xcode 4 but the error: receive signal SIGBART is displayed in the main.m when the method is called through [rect setHeight:10]; and also [rect setWidth:5]; the machine says that instance method -setWidth is not found.... any ideas to cope with that??? Thx

[AppleProgramming]

@eenfach That would usually be because you didn't implement the method in your implementation (.m file). If you need more help feel free to message me via YT or G+.

[jilbapp]

Hi lucas, i am the guy talked to you on twitter; my question is: how can i send a variable across classes ? i mean: i have 2 classes, when a person touch on a button on classe2, the class1 receives a value ? pls send me a email to jilbapp@gmail.com and i ll send pictures and a better explain about my program. thx w8 for answer !

[vinodkalpaka]

very easy to understand.