理解iOS Event Handling

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理解iOS Event Handling

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…

Event Handling Guide for iOS--(一)--About Events in iOS

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…

Event Handling Guide for iOS(五)

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…

Event Handling Guide for iOS--(三)---Event Delivery: The Responder Chain

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…

Event Handling Guide for iOS--(二)---Gesture Recognizers

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 Handling in Spring

Spring内置的event有 1.ContextRefreshedEvent This event is published when the ApplicationContext is either initialized or refreshed. This can also be raised using the refresh() method on the ConfigurableApplicationContext interface. 2.ContextStartedEventT…