In this tutorial we will expand on the previous Core Location tutorial. Here we will extract specific location attributes such as coordinates, altitude, and speed.
Posts Tagged ‘programming’
iOS Core Location GPS Tutorial pt.2
Published on August 18th, 2010 in iPhone Code Snippets & Tutorials, iPhone ProgrammingiOS Core Location GPS Tutorial pt.1
Published on August 16th, 2010 in iPhone Code Snippets & Tutorials, iPhone ProgrammingCore Location is a powerful yet simple iOS framework allowing easy access to the iPhone’s GPS. You can access the coordinates of the device with GPS or cell triangulation, compass, and direction and speed of travel.
Apple’s description:
The Core Location framework lets you determine the current location or heading associated with a device. The framework uses the available hardware to determine the user’s position and heading. You use the classes and protocols in this framework to configure and schedule the delivery of location and heading events. You can also use it to define geographic regions and monitor when the user crosses the boundaries of those regions.
In this tutorial you will learn how to access the raw Core Location data, including the iPhone’s GPS coordinates and speed of travel. (more…)
Core Location GPS Source Code
Published on August 15th, 2010 in iPhone Code Snippets & Tutorials, iPhone ProgrammingI started to write a tutorial today but got a bit burned out in the process. I will finish it eventually, but here is the code for you to tinker with in the meantime.
The code demonstrates Core Location and makes use of custom protocols. The app updates a UILabel with GPS coordinates and speed of travel. Stay tuned, the tutorial will be finished up shortly!
[Source: CoreLocation GPS Demo - 25k]
Blocks & View Transitions Snippet
Published on July 12th, 2010 in iPhone Code Snippets & Tutorials, iPhone ProgrammingLet’s say you have a view overlaying another view that you would like to close in a fancy fashion when the user click a button, thus displaying the view directly below it. Put this code as your button’s IBAction message handler and tell me that doesn’t spice up your app like crazy! I am not going to explain how it looks, just try it. You’ll love it. It’s a nice use of code blocks too. 
-(IBAction)onButtonClick:(id)sender { [UIView transitionWithView:self.view duration:0.2 options:UIViewAnimationOptionTransitionFlipFromLeft animations:^{ self.view.frame = CGRectOffset(self.view.frame, 0, -self.view.frame.size.height); } completion:^(BOOL finished) { [self.view removeFromSuperview]; [self release]; }]; }
Simple iPhone Animation Tutorial
Published on July 11th, 2010 in iPhone Code Snippets & Tutorials, iPhone ProgrammingThe learning curve of Cocoa can be steep depending on your background, but it’s a climb that is sure to leave a smile on your face every few steps of the way. Just enough to offset the hair pulling and cursing that is sure to ensue from jumping into Cocoa programming for the first time. One of the features that sweetened things up for me was Cocoa’s UIView animation capabilities. There is a lot to cover, and I just don’t have the time to even think about how to approach a lesson on all the animation features. I will give you an example of basic animation and a possible implementation and point you in the direction of Apple’s documentation so that you can build upon what you learned here.
For more information make sure to read Apple’s documentation on the UIView class. There is a lot more you can do with but let this be simply a foundation for you to learn the basic concept.
Navigation Controller Source Code
Published on July 9th, 2010 in iPhone Code Snippets & Tutorials, iPhone ProgrammingHere is the source code to a simple iPhone project I made that demonstrates the Navigation Controller.
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Polygons iPhone Source Code
Published on July 7th, 2010 in iPhone Code Snippets & Tutorials, iPhone ProgrammingHere is the source code to a simple project I made in an iPhone development class I took. Click the + and – signs to increase / decrease the number of sides on the polygon. It was one of the funner projects in that class, so I wanted to share my solution to it.
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Using iOS 4 Frameworks on OS 3
Published on July 4th, 2010 in iPhone ProgrammingWith iOS 4 comes 1500 new features for developers to take advantage of. Unfortunately, not all of your users will be able to enjoy this new experience. For example, if your user has a 1st generation device only capable of running OS 3.1. Or an iPad which (at the time of writing this article) only runs 3.2. Utilizing some of these new features will make or break a cross version app, but some can be worked with. This tutorial demonstrates how to solve this problem.
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iPhone App Testing Suite
Published on July 2nd, 2010 in iPhone ProgrammingMore than ever before, you must fully test your app on multiple devices now that the iPhone 4 and iOS 4 have been released. With the APIs changing so fast, you need to be sure your user has a positive experience. That means no crashing or missing features because they are using an older iPhone with an older OS and you are only testing on the cutting edge technology.
Here is my suite looks like. Yours should resemble this too if you are deploying for multiple OS versions:
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UIImage & The Retina display
Published on July 2nd, 2010 in iPhone Code Snippets & Tutorials, iPhone ProgrammingIf you were previously loading a UIImage with initWithContentsOfFile, you will need to change your code slightly if you want to support the high resolution capabilities of the iPhone 4 retina display. (more…)
