In Objective-C you can extend a class given in two ways: by running a classic subclassing (see also inheritance) or using the so-called categories .
Note: there is also a third way in Objective-C indicated by the name of Posing we might call a mix of subclass (because it defines a new name) and categories (for a given moment all classes of one type behave like new) .
ai dati dell'immagine. To store an image in NSUserDefaults is sufficient to be able to get a pointer NSData image data. In this way we could rebuild our image at any time thereafter.
In the example shown below is used an array that contains a maximum of 4 images. Each new image is put on the head and the excess removed.
How many programmers to use, I also build my own library of functions ready to be reused in multiple projects and multiple contexts. Let me change the title of this post, maybe a little 'risky but, nevertheless, as we shall see, not far from reality.
In Objective-C you can write and call C / C + +, including the assembly for that matter. This characteristic makes it a truly versatile language and, in some respects, phenomenal. On the one hand, you can use and appreciate the purely syntax of Objective-C, on the other you can run faster porting code written in ANSI C (perhaps for Digital Unix or Sun) and can comfortably fit into our iPhone or iPad applications; not to mention all the BSD kernel is already available on Mac OS X!
), un oggetto di più basso livello con innumerevoli potenzialità. The class UIView displays a pointer to the layer ( CALayer ), an object of the lower level with vast potential. The layer provides a variety of methods and properties related to displaying the contents of the view. For example, you can manipulate the contents of a view in three dimensional space. In ' sample carryover is interesting to note that the code is simple, and everything is created using Interface Builder:
Not only browsers portatitli desktop or browsing the sites developed by us, now the era of mobile - the mobile browser - is widespread, thanks to devices like the Apple iPhone, Android, etc ... Furthermore, even for developers for the Apple iPhone has become mandatory to understand to which device the application is running.
On the Web, the situation is similar to that displayed in the Browser or Mobile Browser? , with the variant:
In Very short snippet: Remove scroll from a UIWebView object we saw how it was possible to remove the scroll from an object UIWebView :
Foursquare allows through its API to access a range of features (many in this version 1) directly from our iPhone apps. We see, therefore, how to integrate access to Foursquare in Objective-C using the known framework ASIHTTPRequest to perform basic authentication.
I respond to Mirko asking me how to make the opposite case proposed in Getting Latitude and Longitude in Objective-C .
Starting from the values of Latitude and Longitude you can use the class MKReverseGeocoder to obtain a range of information, such as: city, state, address in full, chap!
The object UIWebView component is a very useful and versatile, ideal for solving many problems. Not only is perfect to display an HTML page on the net, but you can use it for other useful purposes such as:
Documented or undocumented, a feature, sometimes, you are forced to implement by force! Useful in some situations, the scroll is to remove an object from UIWebView . : Interestingly, in general, see how you can access the components 'internal' part of the object in question: in this example retrieves the object pointer UIScrollView present in the subject UIWebView :
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Mark : @ Mark: Thanks for the answer. For example, if you have a code to save / use the folder ...
Mark : Thanks for the answer. For example, if you have a code to save / use the folder ...
Giovambattista Fazioli : @ Mark: in principle, absolutely, a lot depends on how and what to download. La. ..
Mark : Hello, good guide! I wanted to ask, you can use the same code to run a sql database? Instead of ...
Joseph : Hi I wanted to ask you how you can do in the post I uploaded a gallery of 50 images, for example, ...