Understanding the Objective-C Runtime

theflyingjalapenolives.com — An article with several resources to help you learn about the Objective-C runtime. read more...

add a comment | category: Objective-C | Views: 66

Types vs. Objects

howtomakeiphoneapps.com — You will encounter two kinds of variables when working with Objective-C. Objects such as the UIAlert and simple types like integers and doubles. These things can cause some confusion because they follow different rules even though they are used in similar ways. read more...

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How to check internet connection reachability in wireless local area

inchoo.net — I know you will now say there is “Reachability” named sample app at developer connect library to download, but it ain’t what I am looking for. What I am looking for is feature that will tell me do I have internet connection while I have network connection, to be more accurate, do I have internet connection... read more...

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Making the Move: C# to Objective-C [Syntax]

published 1 year, 1 month ago, submitted by MattjDrake 1 year, 1 month ago

howtomakeiphoneapps.com — Are you a C# or Java programmer who is trying to take the plunge into the iPhone/Mac development world? That was me too a little over a year ago; I tried my hand at Objective-C thinking it would be a snap since I was already so proficient at C# and the whole family of .NET products. Plus, Steve Job’s presentation about XCode made programming for the iPhone seem so easy and sexy. How Different Could Objective-C Really Be? If you are interested in reading this it is because you probably already know that it is VERY different. It seems like it shouldn’t be: the iPhone is essentially a client technology, Objective-C is an object-oriented programming language and Cocoa-Touch is simply a framework. This week I am going to be a talking about Objective-C what tips you need to know about the language. Because even though the videos make it all look easy with the syntax coloring, the shiny XCode IDE and the Steve Jobs halo effect learning how to work with Objective-C can be very disorienting for newbies. In particular, it is disorienting for people who already know a programming language. It is a also a very rewarding experience to work with Objective-C once you get the hang of it – so keep with it! And Then There Are the Square Brackets This is probably the one thing that scare people off the most about Objective-C. Here is an example of something you would do using the square brackets of Objective-C: [alert displayWithThisMessage:@"I say this!"]; Look at the above statement very closely. In C# (and I think Java) it would look something like this: Alert.DisplayWithThisMessage("I say this!"); This difference seems minor when you are looking at it in a blog entry – it is when you are hacking on it at 3AM and attempting to use nested methods that it messes with your head. Here Are the Pieces of Syntax Again, consider the statement: [alert displayWithThisMessage:@"I say this!"]; A Line of Code The first thing you should notice is that the entire statement is surrounded in square brackets ([,]) and the line of code ends with a semi-colon (;). Enter the Object Stage Left The next thing is the object; Objective-C is a very object-oriented language and when you are dealing purely with Objective-C you can assume everything is an object. The object in this statement is alert. The Method is the Message! In Objective-C you will not be calling an object’s method, but you will be sending a message to an object. This has read more...

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Private Properties

theflyingjalapenolives.com — quick discussion on Objective-C 2.0 properties. read more...

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How to Use Objective-C Dictionaries

published 1 year, 1 month ago, submitted by MattjDrake 1 year, 1 month ago

howtomakeiphoneapps.com — How to Use Dictionaries Like an array, a dictionary is a list of objects. However, dictionaries make it easier to organize data by providing “keys” that make it a snap to find the things you put in there. These are sometimes referred to as a hash or a hash-table. read more...

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Objective C 2.0: An Intro - Part 2

published 1 year, 1 month ago, submitted by kannan 1 year, 2 months ago

icodeblog.com — This is the second series of tutorials introducing readers to Objective C. read more...

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How to save UIImage into iPhone’s saved photos album?

inchoo.net — This is quite simple, infact it is one row code like everything else in iPhone development. Well, not everything is “quite” simple as this but most of stuff is “quite” easy to implement. Enough with “quite” ! Here is really simple code; read more...

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