iOS app development steps

While the task of developing an app may seem daunting, the whole process can be abstracted into a few relatively simple steps, and these steps will help you get there when you develop your first app. Define concept every good app starts with a concept. The best way to get this concept is to think about what you're going to do with your app, and a good app solves a single, well-defined problem, like the Settings app allows users to adjust all of the device's settings, It provides the user with a separate interface for the user to complete a series of related tasks. Here are some key questions to get a good concept: who is the audience? The content and experience of your app depends on whether you're writing a kids game, a Todo app, or a test app for your own learning. What is the purpose of the app? It is important for the app to have a clear definition, including what the user is driving to use your app. What problem does your app solve? The app should solve a problem well rather than provide a solution for several different issues, and if you find that there are multiple unrelated issues to solve, you might want to consider writing more apps. What does your app include? Think about what content your app will present to the user and how they will interact with it. Design an interface where users can supplement the content you present. This concept does not have to be perfect and complete at the beginning of development, but it is always good to know exactly where you are and how you are going in this direction. Design UI with concept, the next step in creating a successful app is to design a good UI that should allow users to interact with the app in the simplest way possible, to design an interface that is always user-friendly, efficient, clear, and straightforward. Perhaps the most challenging way to build a UI is to convert the concept into a design and then implement the design. Storyboard is designed to simplify this process, allowing you to design and implement the interface at the same time in a graphical environment. You can directly see the effect of your build, always know which designs are feasible and which are not, and modify them at any time. When you work in storyboard, you build a variety of view, which shows the content to the user, and the iOS development tutorial is easy to get started: the basics. Defining an interactive UI does not have logic behind it, creating an interface, and writing code to define how the user interacts with what he sees and how the interface responds. Before you begin to consider adding behavior to the interface, it is important to know that the iOS app is event-driven, and that in event-driven programming, the flow (workflow) of the app is determined by event, which includes: System events and user actions. The user implements the action on the interface, triggering the event in the app, which triggers the execution of the app logic and the processing of the relevant data, and then the app responds to the user's actions in the interface. Define how users interface with each otherAlways consider the concept of event-driven, as the app code executes when the user, not the developer, is acting. You need to know what actions the user can perform and how the app responds. Most event processing logic is defined in the view controller, as described in other related tutorials. The implementation behavior defines what actions the user can implement in the app, and then writes the code to implement the corresponding behavior. Write iOS app code and spend most of your time dealing with Objective-c programming languages. OBJECTIVE-C provides object-oriented capabilities and a dynamic runtime with all familiar C language elements, such as basic data types (int, float, etc.), structures, functions, pointers and control flows (while, If...else, and for) on a C language basis , you can also use the functions of the C standard library, such as those declared in Stdlib.h and stdio.h. The object is to build the app's bricks when building the iOS app, most of the time in dealing with objects. The object encapsulates the data and related behaviors. An app can be imagined as an ecosystem of interconnected objects that communicate with each other to solve specific problems, such as displaying a visual interface, responding to user input, or storing information. Use a variety of different objects to build your app, from interface elements such as button text, to data objects such as strings and arrays. A class is a blueprint class for an object that describes the behavior and properties common to an object. Multiple buildings built from the same blueprint will have the same structure, and similarly, each instance of a class has the same properties and behavior, and you can write your own classes or use the framework-defined classes. By allocating memory and assigning an initial value, you can create an instance of a class to obtain an object. When Allocate (allocates memory), it allocates enough memory to the object and assigns all 0. Initialization (initialization) is to set the initial state of an object-that is, the variable and property of the instance-to a reasonable value, and then return the object. The purpose of initialization is to return an available object that you must allocate and initialize before using it. One of the basic concepts of objective-c is class inheritance, where a class inherits the behavior of its parent class. When one class inherits from another, the subclass inherits all the behaviors and properties defined by the parent class, and the subclass can define its own behavior and properties or override (overwrite) the behavior of the parent class, which allows you to extend the behavior of a class without repeating its existing behavior. Objects communicate between objects by sending messages to each other at run time, in the objective-c term, an object sends a message to it by making a method call to another object. Although ObjectiThere are several ways to send a message to an object in Ve-c, but the basic syntax of square brackets is the most commonly used at this time. If you have an object of the person class Someperson, you can send it a sayHello message: [Someperson SayHello]; the Someperson reference on the left is the recipient of the message. The SayHello message on the right is the recipient method name that will be called. In other words, when the above code executes, Someperson receives the SayHello message. Use protocol to define Message delivery protocol You can define the behavior that is used by the object in a specific set of circumstances, protocol is defined as a program interface, and any class can choose to implement it. Two classes that do not have an inheritance relationship can use protocol to communicate with each other and implement functionality. Any class that can provide useful behavior for other classes can provide these behaviors anonymously by declaring the program interface, and any other class can also choose to take these protocol and implement one or more of its methods to take advantage of these behaviors. After organizing the data to implement the app's behavior, you need to build a data model to support the app's interface, and the app's data model defines how the app data is maintained, from basic object indexing to complex databases that belong to the data model. The app's data model should reflect its content and purpose, and there should be a clear correlation between the interface and the data, although the user does not interact directly with the data. A good data model is important to build a solid foundation for your app, which makes the app more flexible and makes it easier to improve functionality. Using the right resource design patterns is the best way for apps to solve general problems, using design patterns to help you define the structure of your data model and how your data model interacts with other parts of the app. Once you understand and use the right design pattern, it's easy to create simple and efficient apps. When you start implementing your model, not everything has to be developed from scratch, and there are a lot of out-of-the-box frameworks that can be used, for example, the Foundation framework includes classes that represent basic data types-such as strings and numbers-and collection classes used to store other objects. It is recommended that you use existing framework classes as much as possible-or add functionality to your own app by inheriting them-and try not to re-implement their functionality in order to create an efficient and sophisticated app. Often you will also need to write some custom classes for your data model to manage the internal constructs of the control app. Organize real data when you start testing a data model, you typically use static pseudo-data, which allows you to determine whether the model is working correctly before you can use real data, and then introduce real data later.

iOS app development steps