VoiceOver是苹果“读屏”技术的名称,属于辅助功能的一部分.VoiceOver可以读出屏幕上的信息,以帮助盲人进行人机交互. 这项技术在苹果的各个系统中都可以看到,OS X,iOS,watchOS,甚至tvOS. 苹果公司的VoiceOver在2015年6月18日获得了美国盲人基金会(American Foundation for the Blind, AFB)颁发的海伦凯勒成就奖,成为全球首家获得此殊荣的科技公司. 单从iOS来说,iOS的VoiceOver功能可以毫不夸张的说是三大移动…

About View Controllers View controllers are a vital link between an app’s data and its visual appearance. Whenever an iOS app displays a user interface, the displayed content is managed by a view controller or a group of view controllers coordinating…

原文:View Programming Guide for iOS View and Window Architecture Views and windows present your application’s user interface and handle the interactions with that interface. UIKit and other system frameworks provide a number of views that you can use a…

About Table Views in iOS Apps Table views are versatile user interface objects frequently found in iOS apps. A table view presents data in a scrollable list of multiple rows that may be divided into sections. 表格视图是通用用户界面对象,常常能在iOS应用程序里看到. 表格视图在一个多行的一…

  Animations Animations provide fluid visual transitions between different states of your user interface. In iOS, animations are used extensively to reposition views, change their size, remove them from view hierarchies, and hide them. You might use…

Views Because view objects are the main way your application interacts with the user, they have many responsibilities. Here are just a few: 因为视图对象是应用程序跟用户交互的主要方式,所以它们有很多责任.以下是其中一小部分: Layout and subview management 布局和子视图管理 A view defines its own defau…

Next About iOS Collection Views 关于iOS Collection Views A collection view is a way to present an ordered set of data items using a flexible and changeable layout. The most common use for collection views is to present items in a grid-like arrangement,…

Windows Every iOS application needs at least one window—an instance of the UIWindow class—and some may include more than one window. A window object has several responsibilities: 每个iOS应用程序需要至少一个窗口---UIWindow类的一个实例---有些可能有不止一个窗口.窗口对象的任务是: It contains…

View and Window Architecture 视图和窗口架构 Views and windows present your application’s user interface and handle the interactions with that interface. UIKit and other system frameworks provide a number of views that you can use as-is with little or no mod…

Next About Windows and Views 关于窗口和视图 In iOS, you use windows and views to present your application’s content on the screen. Windows do not have any visible content themselves but provide a basic container for your application’s views. Views define a…

Book Description Learn to develop iPhone and iPad applications for networked enterprise environments The iPhone and iPad have made a powerful impact on the business world. Developers creating iOS apps for the enterprise face unique challenges involvi…

原文:View Programming Guide for iOS 1 Introduction 先熟悉一下基本概念. Window Windows do not have any visible content themselves but provide a basic container for your application's views. Every application has at least one window that displays the application'…

Custom Layouts: A Worked Example Creating a custom collection view layout is simple with straightforward requirements, but the implementation details of the process may vary. Your layout must produce layout attributes objects for every view your coll…

Resizing the View Controller’s Views A view controller owns its own view and manages the view’s contents. In the process, the view controller also manages the view’s subviews. But in most cases, the view’s frame is not set directly by the view contro…

Resource Management in View Controllers View controllers are an essential part of managing your app’s resources. View controllers allow you to break your app up into multiple parts and instantiate only the parts that are needed. But more than that, a…

View Controller Basics Apps running on iOS–based devices have a limited amount of screen space for displaying content and therefore must be creative in how they present information to the user. Apps that have lots of information to display must there…

Navigating a Data Hierarchy with Table Views 导航数据表视图层次 A common use of table views—and one to which they’re ideally suited—is to navigate hierarchies of data. A table view at a top level of the hierarchy lists categories of data at the most general l…

  Designing Your Data Source and Delegate 设计你的数据源和委托 Every collection view must have a data source object providing it with content to display. The data source object is an object that your app provides. It could be an object from your app’s data mod…

Audio Queue Services 的苹果官方文档: https://developer.apple.com/library/ios/documentation/MusicAudio/Conceptual/AudioQueueProgrammingGuide/Introduction/Introduction.html#//apple_ref/doc/uid/TP40005343-CH1-SW1 网友对上面的苹果官方文档的部分翻译: 音频队列服务编程指南(Audio Queue Servi…

简介: iOS基于OS X,而OSX本身基于Unix操作系统.在iOS里面,操作系统的完全路径结构是不可见的,因为每个APP的数据都存储自身的沙盒里面.沙盒环境实际上听起来像这样:一个只允许当前APP访问的文件夹目录.每个APP都有自身的沙盒文件夹,并且沙盒文件夹下的子文件夹只有当前APP能够访问. 当一个iOS APP在设备上安装后,系统为其创建的文件夹结构如下: XXX.app 即Main Bundle Documents/ 存储用户创建的内容 Library/ 存储缓存文件.偏好设置等等…

简介: 如果你阅读这本书,你可能已经牢牢掌握iOS开发的基础,但这里有一些小特点和实践是许多开发者并不熟悉的,甚至有数年经验的开发者也是.在这一章里,你会学到一些很重要的开发技巧,但这仍远远不够,你还需要积累更多的实践来让你的代码更强力. /* 本文翻译自<iOS 7 Programming Pushing the Limits>一书的第三章“You May Not Know”,想体会原文精髓的朋友请支持原书正版. ——————(博客园.新浪微博)葛布林大帝 */ 目录: 一. 最好的命名实践…

Quartz 2D Programming  Guide 官方文档: Quartz 2D Programming Guide 译文: Quartz 2D编程指南(1) - 概览 Quartz 2D编程指南(2) - 图形上下文(Graphics Contexts) Quartz 2D编程指南(3) - 路径(Paths)[上] Quartz 2D编程指南(3) - 路径(Paths)[下] Quartz 2D编程指南(4) - 颜色和颜色空间 Quartz 2D编程指南(5) - 变换 Quar…

Io Programming Guide     Introduction Perspective Getting Started Downloading Installing Binaries Running Scripts Interactive Mode Syntax Expressions Messages Operators Assignment Numbers Strings Comments Objects Overview Prototypes Inheritance Metho…

目录 Overview Quick Example Programming Model Basic Concepts Handling Event-time and Late Data Fault Tolerance Semantics API using Datasets and DataFrames Creating streaming DataFrames and streaming Datasets Input Sources Schema inference and partition…

学习的资料是官网的Programming Guide https://spark.apache.org/docs/latest/graphx-programming-guide.html 首先是GraphX的简介 GraphX是Spark中专门负责图和图并行计算的组件. GraphX通过引入了图形概念来继承了Spark RDD:一个连接节点和边的有向图 为了支持图计算,GraphX引入了一些算子: subgraph, joinVertices, and aggregateMessages等 和 …

OpenGL® ES 3.0 Programming Guide - Book Website http://opengles-book.com sample codes in GitHub: https://github.com/danginsburg/opengles3-book/…

Spark Programming Guide Link:http://spark.apache.org/docs/2.2.0/rdd-programming-guide.html 每个Spark Application包含一个driver程序(运行main方法)以及在集群中执行不同的并行操作. Spark的一级抽象是RDD(2.0之后推荐使用Dataset)划分在不同节点上的元素的集合支持并行处理和自动的故障恢复. RDD的创建:(1)a file in the Hadoop file sys…

参考,http://spark.incubator.apache.org/docs/latest/streaming-programming-guide.html Overview SparkStreaming支持多种流输入,like Kafka, Flume, Twitter, ZeroMQ or plain old TCP sockets,并且可以在上面进行transform操作,最终数据存入HDFS,数据库或dashboard另外可以把Spark's in-built machine le…

http://python.cocos2d.org/doc/programming_guide/index.html The cocos2d Programming Guide provides in-depth documentation for writing applications that use cocos2d. Many topics described here reference the cocos2d API reference, provided separately. I…

GraphX Programming Guide 概述 入门 属性 Graph 示例属性 Graph Graph 运算符 运算符的汇总表 Property 运算符 Structural 运算符 Join 运算符 邻域聚合 聚合消息 (aggregateMessages) Map Reduce Triplets Transition Guide (Legacy) 计算级别信息 收集相邻点 Caching and Uncaching Pregel API Graph 建造者 Vertex and E…