关于3D touch实现备忘
API说明和举例
首先说明的UITouch的
UIForceTouchCapability
UIForceTouchCapabilityUnknown //3D Touch检测失败
UIForceTouchCapabilityUnavailable //3D Touch不可用
UIForceTouchCapabilityAvailable //3D Touch可用
这3个枚举值就是我们来判断设备是否开启3D Touch功能，如果用户有意修改了设备的3D Touch功能，我们还有一个地方来重新检测：
- (void)traitCollectionDidChange:(UITraitCollection *)previousTraitCollection
苹果在ios9上的6s和6s支持了重压功能，具体到应用，提供给我们的api大致有二种
- 一种是在应用logo重按，添加，这个很简单，在plist里面配置或者代码编写，都可以，具体考参考如下：
private func setShorItem(){
if #available(iOS 9.0, *){
if CSDataManager.isLogin(){
let icon1:UIApplicationShortcutIcon?
if #available(iOS 9.1, *) {
icon1 = UIApplicationShortcutIcon.init(type: UIApplicationShortcutIconType.Home)
} else {
// Fallback on earlier versions
icon1 = UIApplicationShortcutIcon.init(type: .Compose)
}
let item1 = UIMutableApplicationShortcutItem.init(type: "home", localizedTitle: "校园", localizedSubtitle: nil, icon:icon1, userInfo: nil)
let icon2 = UIApplicationShortcutIcon.init(type: UIApplicationShortcutIconType.Share)
let item2 = UIMutableApplicationShortcutItem.init(type: "timeline", localizedTitle: "动态", localizedSubtitle: nil, icon:icon2, userInfo: nil)
let icon3:UIApplicationShortcutIcon?
if #available(iOS 9.1, *){
icon3 = UIApplicationShortcutIcon.init(type: UIApplicationShortcutIconType.CaptureVideo)
}else
{
icon3 = UIApplicationShortcutIcon.init(type: UIApplicationShortcutIconType.Play)
}
let item3 = UIMutableApplicationShortcutItem.init(type: "onlineClass", localizedTitle: "在线课堂", localizedSubtitle: nil, icon:icon3, userInfo: nil)
UIApplication.sharedApplication().shortcutItems = [item1,item2,item3]
}
}
}
然后在具体的Appdelegate中
@available(iOS 9.0, *)
func application(application: UIApplication, performActionForShortcutItem shortcutItem: UIApplicationShortcutItem, completionHandler: (Bool) -> Void) {
if (shortcutItem.type == "home") {
self.homeTabController?.selectedIndex = 0
}else if(shortcutItem.type == "timeline"){
self.homeTabController?.selectedIndex = 1
}else if(shortcutItem.type == "onlineClass"){
self.homeTabController?.selectedIndex = 2
let onlineVc = LiveVedioViewController()
let navigationVc = self.homeTabController!.selectedViewController as! UINavigationController
navigationVc.pushViewController(onlineVc, animated: true)
}
}
- 第二种是peek和pop操作，麻烦一点，但是也很好实现，在viewController中首先判断重压是否存在：
func addPeekPop(){
if #available(iOS 9.0, *) {
if self.traitCollection.forceTouchCapability == .Available && TARGET_OS_SIMULATOR != 1{
self.registerForPreviewingWithDelegate(self, sourceView: self.tableView!)
}
} else {
// Fallback on earlier versions
}
}
然后具体实现UIViewControllerPreviewingDelegate的协议，其中viewControllerForLocation是为了重压预览使用，当用于重压到一定程度的时候会触发回调commitViewController，即直接跳转到预览界面，具体使用代码可参考如下
extension CSTimelineViewController:UIViewControllerPreviewingDelegate{
func previewingContext(previewingContext: UIViewControllerPreviewing, viewControllerForLocation location: CGPoint) -> UIViewController? {
var viewController:UIViewController?
if let indexPath = self.tableView?.indexPathForRowAtPoint(location){
if let cellNode = self.tableView?.nodeForRowAtIndexPath(indexPath) where cellNode.isKindOfClass(CSPostContentCellNode.self){
if let post = self.posts?.posts![indexPath.section]{
if let postImages = post.postImages{
var previewPhotoURL = [PhotoURLModel]()
for postImage in postImages {
let photoURL = PhotoURLModel()
photoURL.imageBigUrl = postImage.previewUrl
photoURL.imageSmallUrl = postImage.thumbUrl
previewPhotoURL.append(photoURL)
}
let postCellNode = (cellNode as! CSPostContentCellNode)
//找到对应图片的item
var item = 0
for imageNode in postCellNode.postImageNodes{
let view = (imageNode as! ASNetworkImageNode).view
let point = CGPointMake(location.x, location.y - self.tableView!.contentOffset.y)
let childPoint = self.view.convertPoint(point, toView: view)
let fitView = view.hitTest(childPoint, withEvent:nil)
if fitView != nil{
item = postCellNode.postImageNodes.indexOfObject(imageNode)
break
}
}
let touchIndex = NSIndexPath.init(forItem: item, inSection: 0)
viewController = PhotoBrowserController.getPhotoBrowser(touchIndex, photoURLs: previewPhotoURL){
index in
let imageNode = (cellNode as! CSPostContentCellNode).postImageNodes.objectAtIndex(touchIndex.item)
return cellNode.view.convertRect(imageNode.frame, toView: UIApplication.sharedApplication().keyWindow!)
}
}
}
}
}
return viewController
}
func previewingContext(previewingContext: UIViewControllerPreviewing, commitViewController viewControllerToCommit: UIViewController) {
let rootViewController = AppDelegate.sharedInstance().window?.rootViewController
rootViewController?.presentViewController(viewControllerToCommit, animated: true, completion: nil)
}
唯一需要注意的是location的坐标是相对整个sourceView的，如果sourceView是scrollView之类，计算位置点转换到具体view上需要注意点。
到具体的预览控制中可添加具体的预览动作，参考代码：
@available(iOS 9.0, *)
override func previewActionItems() -> [UIPreviewActionItem] {
let saveItem = UIPreviewAction.init(title: "保存照片", style: .Default, handler: {
action,viewController in
self.saveBtnClick()
self.dimissAction()
})
return [saveItem]
}
