1. basic button format: <tag event caption /> <Button onPress={{}} title="I am button" /> <Button onPress={() => { Alert.alert("You are Right!"); }} title="Push me" /> Usage: (1) import import {Button, Al…

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…

UIImageWriteToSavedPhotosAlbum: Next UIKit Function Reference Overview The UIKit framework defines a number of functions, many of them used in graphics and drawing operations. Functions by Task Application Launch UIApplicationMain Image Manipulation…

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…

Mirror of Apple’s iOS samples This repository mirrors Apple’s iOS samples. Name Topic Framework Description ABUIGroups Data Management(Contact Data) AddressBook ABUIGroups shows how to check and request access to a user’s address book database. It al…

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…

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…

不想长篇大论,也是自己遗留下的一个错误的理解 在移动端触屏事件有四个 // 手势事件 touchstart //当手指接触屏幕时触发 touchmove //当已经接触屏幕的手指开始移动后触发 touchend //当手指离开屏幕时触发 当然还有个touchcancel事件,但是我测试后,并没发现有什么卵用 每个触摸事件对象中都包括了touches这个属性,用于描述前位于屏幕上的所有手指的一个列表 那么获取当前事件对象我们习惯性的使用  event = event.touches[0] ,我记得…

touches: 当前屏幕上所有触摸点的列表; targetTouches: 当前对象上所有触摸点的列表; changedTouches: 涉及当前(引发)事件的触摸点的列表 通过一个例子来区分一下触摸事件中的这三个属性: 1. 用一个手指接触屏幕,触发事件,此时这三个属性有相同的值. 2. 用第二个手指接触屏幕,此时,touches有两个元素,每个手指触摸点为一个值.当两个手指触摸相同元素时, targetTouches和touches的值相同,否则targetTouches 只有一个值.ch…

在UIView上加载了一个UIScrollView(全屏),touches 事件捕获不到了 原因:UIView的touch事件被UIScrollView捕获了,无法传递下去 解决方法:写一个UIScrollView的category,在每个使用UIScrollView的地方将该类别导入 1.创建类别 file为UITouch class为UIScrollView 2..m里内容 #import "UIScrollView+UITouch.h" @implementation UIScr…