【iOS】3D Touch

文章内容来源于Apple的开发者文档：https://developer.apple.com/library/content/documentation/UserExperience/Conceptual/Adopting3DTouchOniPhone/，这个文档中还提供了几个示例，建议直接阅读该文档。

------------------------------------------------------------------------------

iOS 9中以后，引入了3D Touch功能。主要包括两个方面，一是Home Screen Quick Actions, 二是Peek and Pop。

Home Screen Quick Actions

实现这个主要有两种方式，

1. 在Info.plist中的UIApplicationShortcutIconTypeAdd下定义静态的quick actions；
2. 动态的定义，使用UIApplicationShortItem及相关的API定义quick action，添加到UIApplication对象的shortcutItems属性。

这里主要说一下第一种方式中各property的含义,先来看一个示例：

<key>UIApplicationShortcutItems</key>
    <array>
        <dict>
            <key>UIApplicationShortcutItemIconFile</key>
            <string>open-favorites</string>
            <key>UIApplicationShortcutItemTitle</key>
            <string>Favorites</string>
            <key>UIApplicationShortcutItemType</key>
            <string>com.mycompany.myapp.openfavorites</string>
            <key>UIApplicationShortcutItemUserInfo</key>
            <dict>
                <key>key1</key>
                <string>value1</string>
            </dict>
        </dict>
        <dict>
            <key>UIApplicationShortcutItemIconType</key>
            <string>UIApplicationShortcutIconTypeCompose</string>
            <key>UIApplicationShortcutItemTitle</key>
            <string>New Message</string>
            <key>UIApplicationShortcutItemType</key>
            <string>com.mycompany.myapp.newmessage</string>
            <key>UIApplicationShortcutItemUserInfo</key>
            <dict>
                <key>key2</key>
                <string>value2</string>
            </dict>
        </dict>
    </array>

各个key的解释：

Peek and Pop

可以在view controller中响应用户不同力度的按压。交互处理过程(还是按Apple的原文吧，翻译的表达不太好，原文也很简单)：

1. Indication that content preview is available.
2. Display of the preview ---- known as a peek ---- with options to act on it directly ---- known as peek quick actions
3. Optional navigation to the view shown in the preview ---- known as a pop