String is a very useful data type in programming language especially in swift. This article will show you some examples about how to create string, manipulate string in swift coding. To make the code execution immediately to show the result, you had better create a xcode playground project and run below example code in it, […]
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Xcode playground project is a project that can help you to run your swift source code immediately when you write it. This is something like what you see is what you get. It is also similar to python’s user interactive console. You write the code, then you see the result of the code’s execution. This
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iCloud is a very good place for you to save your iOS device documents ( such as photos, videos, audios, etc ) in the cloud. This service can make your documents never lost. So when we take a picture with iPhone, the picture will be synced to iCloud and then sync to every device that
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UITextField can be used to display a one-line text editor input box. While UITextView can be used to display a multiple-line text area, it can be either editable or read-only. This example will show you how to add text filed and text view in the iOS application, and how to respond to user action (
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When you develop an iOS application, sometimes you may need to create a SubView and add it into the iOS root view object programmatically. This article will just show you an example about how to do it.
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After you develop and test your iOS app in the Xcode simulator, you also need to deploy your app to a real device such as iPhone or iPad device to run and test. Because some bugs only exist on the real device, so it is also necessary. This article will tell you how to do
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After you create an Xcode project for iOS app development, you must wonder about the files under the project folder. And besides that, you also do not know one Xcode project can have multiple targets, one target defines a series of build-related settings information ( for example target deployment iOS version, target device, etc) for
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When you create an iOS application with Xcode, the following two files play the primary role in the application development. AppDelegate.swift and ViewController.swift ( In Objective-C project the file are AppDelegate.h, AppDelegate.m, ViewController.h and ViewController.m). No matter swift or objective-c, the concept is the same.
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When you add a UI component such as a button in the interface builder of the Xcode project, you can adjust it’s position by hand. For example, you place the button at the center position both horizontally and vertically. But when you preview the screen on different devices or in different screen orientations. You will
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Swift is a newly designed programming language for iOS developers, it is more clear and easy to understand than Objective-C. This article will show you the swift hello world example coding with swift. It will also show you how to install Xcode ( iOS IDE ), how to create, debug and run an iOS project
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