iphone 6s给人惊喜之一就是3D Touch,今天就来瞅瞅它.
UITouch有个force属性,一般的压力感应值为1.0,可以设置他的maximumPossibleForce最大值,即从0到这个值的范围.可以利用这个压感值来画出不同粗细的线条.
if traintCollection.forceTouchCapability == .Available {
addLineFromPoint(touch.previousLocationInView(self),
toPoint: touch.locationInView(self), withForce: touch.force)
}
CGContextSetLineWidth(cxt, force * strokeWidth)
效果如下:
Screen Shot 2015-10-26 at 8.45.34 PM.png
- Peek Pop
当你点击6s上的邮件列表中的其中一个邮件时,其他邮件会变为半透明,以突出你现在点击的邮件,而当你继续按压时,则会弹出这个邮件的内容,这个即为Peek(下图2),继续按压,邮件内容会显示为全屏模式,即为Pop(下图4).
Screen Shot 2015-10-26 at 8.51.43 PM.png
如果要实现Peek和Pop需要实现代理方法
if traitCollection.forceTouchCapability == .Available {
registerForPreviewingWithDelegate(self, sourceView: view)
}
extension ViewController: UIViewControllerPreviewingDelegate {
func previewingContext(previewingContext: UIViewControllerPreviewing, viewControllerForLocation location: CGPoint) -> UIViewController? {
guard let indexPath = tableView.indexPathForRowAtPoint(location),
cell = tableView.cellForRowAtIndexPath(indexPath) as? DoodleCell
else { return nil }
let identifier = "DoodleDetailViewController"
guard let detailVC = storyboard?.instantiateViewControllerWithIdentifier(identifier) as? DoodleDetailViewController
else { return nil }
detailVC.doodle = cell.doodle
detailVC.doodlesViewController = self
previewingContext.sourceRect = cell.frame
// peek
return detailVC
}
func previewingContext(previewingContext: UIViewControllerPreviewing, commitViewController viewControllerToCommit: UIViewController) {
//pop!
showViewController(viewControllerToCommit, sender: self)
}
}
detailVC是Peek的内容.
- Preview actions
可以为Peek内容增加上提操作：
override func previewActionItems() -> [UIPreviewActionItem] {
let shareAction = UIPreviewAction(title: "Share", style: .Default) {
(previewAction, viewController) in
if let doodlesVC = self.doodlesViewController,
activityViewController = self.activityViewController {
doodlesVC.presentViewController(activityViewController, animated:true, completion: nil)
}
}
let deleteAction = UIPreviewAction(title: "Delete",
style: .Destructive) {
(previewAction, viewController) in
guard let doodle = self.doodle else { return }
Doodle.deleteDoodle(doodle)
if let doodlesViewController = self.doodlesViewController {
doodlesViewController.tableView.reloadData()
}
}
return [shareAction, deleteAction]
}
效果如下：
Screen Shot 2015-10-26 at 9.29.08 PM.png
<h3>Home screen quick actions</h3>
Screen Shot 2015-10-26 at 9.32.42 PM.png
有两种添加方法：
- 静态添加
直接在plist文件里添加.
Screen Shot 2015-10-26 at 9.34.55 PM.png
在AppDelegate文件里添加:
func application(application: UIApplication,
performActionForShortcutItem shortcutItem: UIApplicationShortcutItem,
completionHandler: (Bool) -> Void) {
handleShortcutItem(shortcutItem)
completionHandler(true)
}
func handleShortcutItem(shortcutItem: UIApplicationShortcutItem) {
switch shortcutItem.type {
case "com.razeware.Doodles.new":
presentNewDoodleViewController()
default: break
}
}
func presentNewDoodleViewController() {
let identifier = "NewDoodleNavigationController"
let doodleViewController = UIStoryboard.mainStoryboard
.instantiateViewControllerWithIdentifier(identifier)
window?.rootViewController?
.presentViewController(doodleViewController, animated: true,
completion: nil)
}
- 动态添加
static func configureDynamicShortcuts() {
if let mostRecentDoodle = Doodle.sortedDoodles.first {
let shortcutType = "com.razeware.Doodles.share"
let shortcutItem = UIApplicationShortcutItem(type: shortcutType, localizedTitle: "Share Latest Doodle",
localizedSubtitle: mostRecentDoodle.name,
icon: UIApplicationShortcutIcon(type: .Share),
userInfo: nil)
UIApplication.sharedApplication().shortcutItems = [ shortcutItem ]
} else {
UIApplication.sharedApplication().shortcutItems = []
}
拓展:
