在Playground中使用实时照片 [英] Working with Live Photos in Playground
问题描述
我已经做了大量的网络搜索，但我目前正在尝试使用Playground中的实时照片。我知道这个框架（PHLivePhoto），我不知道如果在Playground中与他们合作是可能的，因为没有太多的导入，因为似乎没有任何实时照片可用在线下载。任何想法？
I've done a fair amount of searching the web, but I'm currently attempting to work with "Live Photos" in Playground. I'm aware of the framework (PHLivePhoto), I just have no clue if working with them in Playground is possible due to that fact that there's not much to "import" as there doesn't seem to be any "Live Photos" available for download online. Any ideas?
推荐答案
可以从实际实时照片的元素中制作和查看Playground 中的PHLivePhoto 。
It's possible to make and view a PHLivePhoto in the Playground from the elements of an actual Live Photo.
在OS X的照片应用中，选择一张实时照片并转到菜单
In OS X's Photos app, select a Live Photo and go to menu
文件>导出>导出原始...
File > Export > Export original...
它将创建 .JPG 和 .mov 。
将这两个文件放在 Resources 文件夹中of Playground（菜单View> Navigators> Show Project Navigator）。
Drop these two files in the Resources folder of the Playground (menu View > Navigators > Show Project Navigator).
使用 NSBundle （在我的例子中，文件是IMG_0001.JPG和IMG_0001.mov）：
Get the URLs for these two files with NSBundle (in my example the files are "IMG_0001.JPG" and "IMG_0001.mov"):
let imgURL = NSBundle.mainBundle().URLForResource("IMG_0001", withExtension: "JPG")!
let movURL = NSBundle.mainBundle().URLForResource("IMG_0001", withExtension: "mov")!
并创建一个实际图像，我们将需要它用于实时图片预览图像：
And create an actual image, we will need it for the Live Photo preview image:
let prevImg = UIImage(named: "IMG_0001.JPG")!
导入必要的框架：
import Photos
import PhotosUI
import XCPlayground
并以异步模式设置Playground：
And set the Playground in asynchronous mode:
XCPlaygroundPage.currentPage.needsIndefiniteExecution = true
现在我们将使用 PHLivePhoto 的 requestLivePhotoWithResourceFileURLs 从我们的元素创建PHLivePhoto的方法：
Now we're going to use PHLivePhoto's requestLivePhotoWithResourceFileURLs method to create a PHLivePhoto from our elements:
func makeLivePhotoFromItems(imageURL: NSURL, videoURL: NSURL, previewImage: UIImage, completion: (livePhoto: PHLivePhoto) -> Void) {
PHLivePhoto.requestLivePhotoWithResourceFileURLs([imageURL, videoURL], placeholderImage: previewImage, targetSize: CGSizeZero, contentMode: PHImageContentMode.AspectFit) {
(livePhoto, infoDict) -> Void in
// for debugging: print(infoDict)
if let lp = livePhoto {
completion(livePhoto: lp)
}
}
}
然后我们这样打电话：
makeLivePhotoFromItems(imgURL, videoURL: movURL, previewImage: prevImg) { (livePhoto) -> Void in
// "livePhoto" is your PHLivePhoto object
}
例如，假设您希望Playground制作实时视图：
For example, let's say you want the Playground to make a live view:
makeLivePhotoFromItems(imgURL, videoURL: movURL, previewImage: prevImg) { (livePhoto) -> Void in
let rect = CGRect(x: 0, y: 0, width: 2048, height: 1536)
let livePhotoView = PHLivePhotoView(frame: rect)
livePhotoView.livePhoto = livePhoto
XCPlaygroundPage.currentPage.liveView = livePhotoView
livePhotoView.startPlaybackWithStyle(PHLivePhotoViewPlaybackStyle.Full)
}
请注意，由于没有办法与实时视图交互以开始播放Live Photo，我们必须自己使用 PHLivePhotoView 的 startPlaybackWithStyle 方法。
Note that since there's no way to interact with the live view to start the playback of the Live Photo we have to do it ourselves with PHLivePhotoView's startPlaybackWithStyle method.
您可以通过在菜单中显示助理编辑器强制实时视图显示在Playground中
You can force the live view to appear in the Playground by showing the Assistant Editor in menu
查看>助理编辑器>显示助理编辑器
View > Assistant Editor > Show Assistant Editor
注意：它可以达到一段时间让Playground创建PHLivePhoto并启动实时视图。
使用Xcode 7.3b + 我们终于可以在Playgrounds中进行一些UI交互了。
With Xcode 7.3b+ we can finally have some UI interaction in Playgrounds.
我用简单的视图和touchesBegan改编了这个答案，只需点击控制台这样说时的LivePhoto：
I've made an adaptation of this answer with a simple view and touchesBegan, just click the LivePhoto when the console says so:
import UIKit
import XCPlayground
import Photos
import PhotosUI
class PLView: UIView {
let image: UIImage
let imageURL: NSURL
let videoURL: NSURL
let liveView: PHLivePhotoView
init(image: UIImage, imageURL: NSURL, videoURL: NSURL) {
self.image = image
self.imageURL = imageURL
self.videoURL = videoURL
let rect = CGRect(x: 0, y: 0, width: image.size.width, height: image.size.height)
self.liveView = PHLivePhotoView(frame: rect)
super.init(frame: rect)
self.addSubview(self.liveView)
}
func prepareLivePhoto() {
makeLivePhotoFromItems { (livePhoto) in
self.liveView.livePhoto = livePhoto
print("\nReady! Click on the LivePhoto in the Assistant Editor panel!\n")
}
}
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
print("\nClicked! Wait for it...\n")
self.liveView.startPlaybackWithStyle(.Full)
}
private func makeLivePhotoFromItems(completion: (PHLivePhoto) -> Void) {
PHLivePhoto.requestLivePhotoWithResourceFileURLs([imageURL, videoURL], placeholderImage: image, targetSize: CGSizeZero, contentMode: .AspectFit) {
(livePhoto, infoDict) -> Void in
// This "canceled" condition is just to avoid redundant passes in the Playground preview panel.
if let canceled = infoDict[PHLivePhotoInfoCancelledKey] as? Int where canceled == 0 {
if let livePhoto = livePhoto {
completion(livePhoto)
}
}
}
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
XCPlaygroundPage.currentPage.needsIndefiniteExecution = true
let plview = PLView(image: UIImage(named: "IMG_0001.JPG")!,
imageURL: NSBundle.mainBundle().URLForResource("IMG_0001", withExtension: "JPG")!,
videoURL: NSBundle.mainBundle().URLForResource("IMG_0001", withExtension: "mov")!)
XCPlaygroundPage.currentPage.liveView = plview
plview.prepareLivePhoto()
Swift 3.0.2的相同示例（Xcode 8.2.1 ）：
import UIKit
import PlaygroundSupport
import Photos
import PhotosUI
class PLView: UIView {
let image: UIImage
let imageURL: URL
let videoURL: URL
let liveView: PHLivePhotoView
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
init(image: UIImage, imageURL: URL, videoURL: URL) {
self.image = image
self.imageURL = imageURL
self.videoURL = videoURL
let rect = CGRect(x: 0, y: 0, width: 300, height: 400)
self.liveView = PHLivePhotoView(frame: rect)
super.init(frame: rect)
self.addSubview(self.liveView)
}
func prepareLivePhoto() {
makeLivePhotoFromItems { (livePhoto) in
self.liveView.livePhoto = livePhoto
print("\nReady! Click on the LivePhoto in the Assistant Editor panel!\n")
}
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
print("\nClicked! Wait for it...\n")
self.liveView.startPlayback(with: .full)
}
private func makeLivePhotoFromItems(completion: @escaping (PHLivePhoto) -> Void) {
PHLivePhoto.request(withResourceFileURLs: [imageURL, videoURL], placeholderImage: image, targetSize: CGSize.zero, contentMode: .aspectFit) {
(livePhoto, infoDict) -> Void in
if let canceled = infoDict[PHLivePhotoInfoCancelledKey] as? NSNumber,
canceled == 0,
let livePhoto = livePhoto
{
completion(livePhoto)
}
}
}
}
let plview = PLView(image: UIImage(named: "IMG_0001.JPG")!,
imageURL: Bundle.main.url(forResource: "IMG_0001", withExtension: "JPG")!,
videoURL: Bundle.main.url(forResource: "IMG_0001", withExtension: "mov")!)
PlaygroundPage.current.needsIndefiniteExecution = true
PlaygroundPage.current.liveView = plview
plview.prepareLivePhoto()
这篇关于在Playground中使用实时照片的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
