one of hipaa s five overall objectives is

There are @optional keywords in protocol in Objective-c, and the method that is modified by this keyword is not required to be implemented. We can define a series of methods through an interface, and then selectively implement several of these methods by implementing the class of the interface. In many cases the interface method is optional in the Cocoa API, and all methods of protocol in Swift must be implemented completely differently. Methods that

(This author Amit Bijlani, translated by Cocoachina)After we released the Swift language learning course, we received a lot of emails and private messages to ask if we still need to learn C or objective-c. In addition, people seem to be wondering what parts of the iOS development ecosystem Swift is suitable for. Through this article, I hope to clear your doubts and send you to the correct learning track.Sho

developing a Windows/Linux platform. On the contrary, Apple has added many development restrictions, for example, it must be developed on an Apple Computer (mandatory, because Apple's various sdks must be installed on the Mac operating system), you must register a Development Account (you cannot release the software if you do not need to register the SDK ). There is such a large market for such a language. What can I say about Java? People cannot l

the number of memory citation counts. Within a piece of code, the number of increments and decreases is equal.Iv. CopyUnlike retain, a copy of an object that wants to copy, needs to implement the Nscopying protocol and define the details of the copy (how to copy). If the class does not accept the Nscopying protocol and sends a copy message to the object, it causes crash.Copy is divided into deep copy and shallow copy. We often use (including the example below) a shallow copy, as the difference

As alocal variable:returnType(^blockName)(parameterTypes) = ^returnType(parameters) {...};As a Property:@property (nonatomic, copy)returnType(^blockName)(parameterTypes);As amethod Parameter:- (void)someMethodThatTakesABlock:(returnType(^)(parameterTypes))blockName;As anargument to a method call:[someObject someMethodThatTakesABlock:^returnType(parameters) {...}];As atypedef:typedefreturnType(^TypeName)(parameterTypes);TypeNameblockName = ^returnType(parameters) {...};4. Block Memory Management:

Objective-C memory management I understand When I started to learn iOS, I already had the ARC feature. So I started to learn it in the ARC environment. Although I have some knowledge about memory management, however,

work and publish Web sites. However, administrators are prone to misconfiguration and mis-operation issues. But in general IIS is very easy to learn, but it is very difficult to learn him well.Apache is more difficult to use than IIS and requires people with a certain computer and network Foundation to use. His configuration is not graphical and needs to be done by editing the configuration file. However, from the Apache settings, as long as we strictly follow the Help file for parameter settin

The first part is the basis for language use. This is the basic skill of using the language, and it is also the most important thing that you do not pay attention to. Developing good habits is conducive to the improvement of the level in the future. This part includes 11 units, respectively: Item 1: Always use properties instead of accessible data members Effective C #: using attributes to define private members of a class Http://blog.csdn.net/knight94/archive/2006/06/04/772886.aspx Item 2

IOS12 Sirikit added a new feature shortcuts, the equivalent of playing a computer when the user set shortcut keys, such as I set CTRL+F10 to open Notepad, set the success, I can quickly open the Notepad every time I press CTRL+F10 directly.Shortcuts this time there are two uses, the first is to set the shortcut (shortcut, the same below), through Siri directly ba

How to master a high-level programming language:(here specifically objective-c)bottom-up thinking: down, how to think about the process of running the program from the bottom of the machine. Focus on language constructs, compilation transformations, memory models, run-time mechanismsAbstract thinking: upward, when the complexity of the software is high, the design needs to be abstracted into a code program.Focus on object-oriented, component encapsula

The recent swift fire also wants to try to use it, considering that Swift comes out for a short time, and whether it is too mundane for Apple to update or not to develop existing projects with Swift.Let's take a look at the problems I've encountered:Question One,The cause of the problem is that the build target file cannot generate more than one at compile time. It doesn't seem to understand what it means. Decisive Baidu!The ultimate solution: http://stackoverflow.com/questions/24812983/ Xcode-a