基本概念: 加速计: 又称加速度计,测量设备运动的加速度. 加速度: 矢量,描绘速度的方向和大小变化的快慢. 陀螺仪: 感测与维持方向的装置. 原文: Motion Event声明: 由于本人水平有限,翻译定有不当甚至错误之处,如有发现还望指出. 当用户移动,摇晃,或倾斜设备时,产生motion事件.这些motion事件被设备硬件检测到,就是加速计和陀螺仪. acclerometer事实上是由3个加速计组成,X,Y,Z坐标轴各有一个.每一个测量随着时间的推移以线性的速度变化.结合这三个加速计可以…

About Events in iOS Users manipulate their iOS devices in a number of ways, such as touching the screen or shaking the device. iOS interprets when and how a user is manipulating the hardware and passes this information to your app. The more your app…

Gesture Recognizers 手势识别器 Gesture recognizers convert low-level event handling code into higher-level actions. They are objects that you attach to a view, which allows the view to respond to actions the way a control does. Gesture recognizers interpr…

Event Delivery: The Responder Chain 事件传递:响应链 When you design your app, it’s likely that you want to respond to events dynamically. For example, a touch can occur in many different objects onscreen, and you have to decide which object you want to resp…

事件是发送给应用程序来通知它用户动作的对象.在iOS中,事件可以有多种形式:多触摸事件,motion(,移动,手 势)事件---例如,设备的加速计(accelerometer)--和控制多媒体的事件.(最后一种类型的事件被称为一个远程控制事件因为它起始于一个 耳机或其他外部访问配件).如下图所示: 在iOS中,UIKit和Core Motion框架负责事件传播和投递. 一.事件类型和投递:一 个iPhone.iPad或者iPod touch设备有多种方式集成输入流数据给应用程序访问.多触摸技术直…

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 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…

写在前面 最近的一个iOS App项目中遇到了这么问题:通过App访问服务器的大多数资源不需要登录,但是访问某些资源是需要用户提供验证的,一般来说,通常App的做法(譬如美团App)将这些资源放在“我的”模块,在未登录情况下,当点击“我的”某个模块时,以modally给出一个界面用于登录,我不晓得美团是怎么实现的:但在我看来,比较优雅的方式是在网络底层实现“modally呈现登录界面”,具体来说,当用户欲访问“我的购物券”时,在网络访问层发现用户未登录,就弹出一个登陆界面,用户登录成功后,就将这…

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…

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…