iOS开发 swift 3dTouch实现附代码

一、What？

从iphone6s开始，苹果手机加入了3d touch技术，最简单的理解就是可以读取用户的点击屏幕力度大小，根据力度大小给予不同的反馈。

二、how? 实现方式？

如果静态方式和动态方式同时使用，app默认调用静态方式中的设置。

2.1 静态方式

在info.plist中直接添加，最多只能显示4个，超过4个只会显示前4个。

【效果】

2.2 动态方式

使用代码注册。
【代码】

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {// Override point for customization after application launch.let itemIcon1 = UIApplicationShortcutIcon(templateImageName: "AIcon")let item1 = UIApplicationShortcutItem.init(type: "type1", localizedTitle: "short 兴", localizedSubtitle: "subTitle1", icon: itemIcon1, userInfo: nil)let itemIcon2 = UIApplicationShortcutIcon.init(templateImageName: "rightIcon")let item2 = UIApplicationShortcutItem.init(type: "type2", localizedTitle: "short 海", localizedSubtitle: "subTitle2", icon: itemIcon2, userInfo: nil)let itemIcon3 = UIApplicationShortcutIcon.init(type: .add)let item3 = UIApplicationShortcutItem.init(type: "type3", localizedTitle: "short 物", localizedSubtitle: "subTitle3", icon: itemIcon3, userInfo: nil)let itemIcon4 = UIApplicationShortcutIcon(type: .add)let item4 = UIApplicationShortcutItem.init(type: "type4", localizedTitle: "short 联", localizedSubtitle: "subTitle4", icon: itemIcon4, userInfo: nil)UIApplication.shared.shortcutItems = [item4, item3, item2, item1]return true}

【效果】

三、app内部3d Touch的使用

【步骤1】在需要使用3d Touch的VC中继承UIViewControllerPreviewingDelegate。

class ViewController: UIViewController, UIViewControllerPreviewingDelegate {

【步骤2】实现该delegate的方法。

//当用力按压的时候要预览的VC
func previewingContext(_ previewingContext: UIViewControllerPreviewing, viewControllerForLocation location: CGPoint) -> UIViewController? {var iVC = UIViewController()iVC.view.backgroundColor = UIColor.bluereturn iVC}
//当用力按压持续用力的时候，所要进行的操作
func previewingContext(_ previewingContext: UIViewControllerPreviewing, commit viewControllerToCommit: UIViewController) {var iVC = UIViewController()iVC.view.backgroundColor = UIColor.yellowself.navigationController?.pushViewController(iVC, animated: true)}

【步骤3】给对应的view（按钮）注册3Dtouch事件

            btn.frame = CGRect(x: x, y: y, width: w, height: h)btn.backgroundColor = UIColor.orangebtn.setTitle("button "+"\(i+1)", for: .normal)btn.addTarget(self, action: #selector(onBtn(sender:)), for: .touchUpInside)if traitCollection.forceTouchCapability == .available{registerForPreviewing(with: self, sourceView: btn)//给对应的view（按钮）注册3Dtouch事件}view.addSubview(btn)

【步骤4 peek】
peek没有上滑显示按钮，但松开手指效果消失。

【步骤5 pop】
pop上滑会在底部显示自定义按钮。要实现pop，在previewingContext中返回的VC需要
1、继承UIViewControllerPreviewingDelegate；
2、重写previewActionItems，即pop下方的按钮；

extension ViewController{//重写previewActionItemsoverride var previewActionItems: [UIPreviewActionItem] {let action1 = UIPreviewAction(title: "跳转", style: .default) { (action, previewViewController) inlet showVC = ViewController()showVC.hidesBottomBarWhenPushed = truepreviewViewController.navigationController?.pushViewController(showVC, animated: true)}let action3 = UIPreviewAction(title: "取消", style: .destructive) { (action, previewViewController) inprint("我是取消按钮")}////该按钮可以是一个组，点击该组时，跳到组里面的按钮。let subAction1 = UIPreviewAction(title: "测试1", style: .selected) { (action, previewViewController) inprint("我是测试按钮1")}let subAction2 = UIPreviewAction(title: "测试2", style: .selected) { (action, previewViewController) inprint("我是测试按钮2")}let subAction3 = UIPreviewAction(title: "测试3", style: .selected) { (action, previewViewController) inprint("我是测试按钮3")}let groupAction = UIPreviewActionGroup(title: "更多", style: .default, actions: [subAction1, subAction2, subAction3])return [action1, action3, groupAction]}}

四、github代码

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完整代码附上：https://github.com/Liuyubao/LYB3DTouch