我正在尝试使用以下代码从 PhotoLibrary 中选择视频
imageController.mediaTypes = [kUTTypeMovie: NSString]
选择视频后，在压缩时，我遇到了数组超出边界的问题。
我在网上搜索并找到以下行。我无法将其转换为 Swift 版本（链接）
imageController.mediaTypes = [[NSArray alloc] initWithObjects:(NSString *)kUTTypeMovie, nil]
请让我们知道上述行的 Swift 版本。如果有人能提供这个的 Swift 版本，那将非常有用。
问题2：
我想在应用程序中显示选定的视频，并且需要在点击时播放。我们可以在没有外部插件和使用内置库的情况下做到这一点吗？
Based on Swift 2.2
Suppose you have a imagePickerController and when you want to select both images and videos:
let imagePickerController = UIImagePickerController()
var videoURL: NSURL?
@IBAction func selectImageFromPhotoLibrary(sender: UIBarButtonItem) {
imagePickerController.sourceType = .PhotoLibrary
imagePickerController.delegate = self
imagePickerController.mediaTypes = ["public.image", "public.movie"]
presentViewController(imagePickerController, animated: true, completion: nil)
}
Then after the video is selected, print out its NSURL.
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
videoURL = info["UIImagePickerControllerReferenceURL"] as? NSURL
print(videoURL)
imagePickerController.dismissViewControllerAnimated(true, completion: nil)
}
For question 2:
Yes, you can do it through AVPlayer, you need import AVKit and AVFoundation, and you code may look like this:
if let videoURL = videoURL{
let player = AVPlayer(URL: videoURL)
let playerViewController = AVPlayerViewController()
playerViewController.player = player
presentViewController(playerViewController, animated: true) {
playerViewController.player!.play()
}
}
I made a demo here you can refer, maybe not 100% what you want.
@IBOutlet weak var imgView: UIImageView!
var imagePickerController = UIImagePickerController()
var videoURL : NSURL?
@IBAction func btnSelectVideo_Action(_ sender: Any) {
imagePickerController.sourceType = .savedPhotosAlbum
imagePickerController.delegate = self
imagePickerController.mediaTypes = [kUTTypeMovie as String]
present(imagePickerController, animated: true, completion: nil)
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
videoURL = info[UIImagePickerControllerMediaURL]as? NSURL
print(videoURL!)
do {
let asset = AVURLAsset(url: videoURL as! URL , options: nil)
let imgGenerator = AVAssetImageGenerator(asset: asset)
imgGenerator.appliesPreferredTrackTransform = true
let cgImage = try imgGenerator.copyCGImage(at: CMTimeMake(0, 1), actualTime: nil)
let thumbnail = UIImage(cgImage: cgImage)
imgView.image = thumbnail
} catch let error {
print("*** Error generating thumbnail: \(error.localizedDescription)")
}
self.dismiss(animated: true, completion: nil)
}
对于问题 2：
let player = AVPlayer(url: videoURL)
let playerController = AVPlayerViewController()
playerController.player = player
self.present(playerController, animated: true) {
player.play()
}
Swift 5+ 解决方案：
func openVideoGallery() {
picker = UIImagePickerController()
picker.delegate = self
picker.sourceType = .savedPhotosAlbum
picker.mediaTypes = ["public.movie"]
picker.allowsEditing = false
present(picker, animated: true, completion: nil)
}
斯威夫特 3
import MobileCoreServices
var imagePickerController = UIImagePickerController()
var videoURL: URL?
private func openImgPicker() {
imagePickerController.sourceType = .savedPhotosAlbum
imagePickerController.delegate = self
imagePickerController.mediaTypes = ["public.movie"]
present(imagePickerController, animated: true, completion: nil)
}
extension YourViewController: UIImagePickerControllerDelegate, UINavigationControllerDelegate {
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
videoURL = info[UIImagePickerControllerMediaURL] as? URL
print("videoURL:\(String(describing: videoURL))")
self.dismiss(animated: true, completion: nil)
}
}
func openCamera() {
if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.Camera) {
println("captureVideoPressed and camera available.")
var imagePicker = UIImagePickerController()
imagePicker.delegate = self
imagePicker.sourceType = .Camera
imagePicker.mediaTypes = [kUTTypeMovie!]
imagePicker.allowsEditing = false
imagePicker.showsCameraControls = true
self.presentViewController(imagePicker, animated: true, completion: nil)
} else {
println("Camera not available.")
}
}
func imagePickerController( didFinishPickingMediaWithInfo info:NSDictionary!) {
videoUrl = info[UIImagePickerControllerMediaURL] as! NSURL!
let pathString = videoUrl.relativePath
self.dismissViewControllerAnimated(true, completion: nil)
}
使用 Swift 4 从图库中选择视频
// Put this code where you want to pick the video from gallery
Let imagePickerController = UIImagePickerController ()
imagePickerController.sourceType = .photoLibrary
imagePickerController.delegate = self
imagePickerController.mediaTypes = ["public.movie"]
present(imagePickerController, animated: true, completion: nil)
// UIImagePickerController Delegate Method
func imagePickerController (_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String: Any])
{
let videoURL = info[UIImagePickerControllerMediaURL] as? NSURL
print(videoURL!)
self.dismiss(animated: true, completion: nil)
}
斯威夫特 4.0
您的班级采用 UIImagePickerControllerDelegate 协议
class classname: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate
之后，您需要创建
let imagePickerController = UIImagePickerController()
将此添加到按钮的操作中：-
imagePickerController.sourceType = .photoLibrary
imagePickerController.delegate = self
imagePickerController.mediaTypes = ["public.image", "public.movie"]
present(imagePickerController, animated: true, completion: nil)
委托方法
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
let videoURL = info["UIImagePickerControllerReferenceURL"] as? NSURL
print(videoURL!)
imagePickerController.dismiss(animated: true, completion: nil)
}
试试我做的这个豆荚：
https://github.com/jhonyourangel/ImagePickerWhatsApp
我正在为一个项目搜索类似的图像和视频选择器，但我找不到能够：1.拍照 2.从库中获取图片 3.注册视频 4.从图书馆
当我在寻找时，我希望 facebook 或 mabe google 的 whatsup 有一个可以满足这种需求的 pod，我真的很喜欢 whatsapp 选择器，所以我创建了这个类似于 whatsapp 中的那个。
为了使用 ImageVideoPicker，您需要 cocoapods 和已经创建的 xCode 项目
安装 cocoapods 应该足以sudo gem install cocoapods在终端中运行，如果这不起作用去cocoapods
然后将终端导航到您的项目文件夹，文件扩展名.xcodeproj所在的位置并运行pod init
这将创建一个名为Podfile
Open the file in a editor ( sublimeText, xCode, atom, vim ... etc ) 的文件，并在下面添加以下行use_frameworks!
pod 'ImagePickerWhatsApp'
或 pod 'ImagePickerWhatsApp', :path => '/Users/aiu/Documents/cocoapods/ImagePickerWhatsApp'
然后只需pod install在终端中运行并等待完成安装库
添加import ImagePickerWhatsApp到您的视图控制器类
然后你可以通过调用来调用选择器： let mp = ImageVideoPicker.makeVCFromStoryboard() self.present(mp, animated: true, completion: nil)
要实现委托添加mp.delegate = self和视图控制器类的范围，您需要导入 iOS 照片框架import Photos
extension ViewController: ImageVideoPickerDelegate {
func onCancel() {
print("no picture selected")
}
func onDoneSelection(assets: [PHAsset]) {
print("selected \(assets.count) assets")
}
}
该函数onDoneSelection返回一个包含资产位置信息的资产数组：在设备、iTunes 库或 iCloud 上。
如果您只需要显示图像，您可以在集合视图或类似的东西中使用此代码，只需实现此代码和平
var representedAssetIdentifier: String!
func getImageFrom(asset: Phasset) {
representedAssetIdentifier = asset?.localIdentifier
let imageManager = PHCachingImageManager()
imageManager.requestImage(for: asset!, targetSize: self.frame.size, contentMode: .default, options: nil) { (image, _) in
if(self.representedAssetIdentifier == self.asset?.localIdentifier &&
image != nil) {
self.imageView.image = image
}
}
}
这将只显示缩略图，但很棒，因为它还显示了实时照片和视频的缩略图
该库旨在用于通过网络发送图像或视频，而不是进行花哨的图像或视频编辑。但这并不意味着你不能。你可以做任何事情，因为它返回一个资产数组，但你的工作是实现你需要的。
为了从资产 ImageVideoPicker 中获取数据，ImageVideoPicker 有一种方法将返回带有数据的完成处理程序。
ImageVideoPicker.getDataFrom(asset: asset) { (data) in
if data == nil {
print(data as Any, asset.mediaType, asset.localIdentifier)
} else {
print(data!.count as Any, asset.mediaType, asset.localIdentifier)
}
}
一切都会很有趣
针对当前版本的 Swift 更新：
// Check if the asset is of video media type.
guard (asset.mediaType == PHAssetMediaType.video) else {
print("Not a valid video media type")
return
}
// Obtain the URL of the video.
PHCachingImageManager().requestAVAsset(forVideo: asset, options: nil, resultHandler: {(asset: AVAsset?, audioMix: AVAudioMix?, info: [AnyHashable : Any]?) in
let asset = asset as! AVURLAsset
print("asset.url: ", asset.url) // Here is video URL
// Play the video.
DispatchQueue.main.async(execute: {
let player = AVPlayer(url: asset.url)
let playerViewController = AVPlayerViewController()
playerViewController.player = player
self.present(playerViewController, animated: true) {
playerViewController.player!.play()
}
})
})
func startMediaBrowserFromViewController(viewController: UIViewController!, usingDelegate delegate : protocol<UINavigationControllerDelegate, UIImagePickerControllerDelegate>!) -> Bool {
if UIImagePickerController.isSourceTypeAvailable(.SavedPhotosAlbum) == false {
return false
}
let mediaUI = UIImagePickerController()
mediaUI.sourceType = .SavedPhotosAlbum
mediaUI.mediaTypes = [kUTTypeMovie as String]
mediaUI.allowsEditing = true
mediaUI.delegate = delegate
presentViewController(mediaUI, animated: true, completion: nil)
return true
}
if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.PhotoLibrary) {
println("Camera Available")
var imagePicker = UIImagePickerController()
imagePicker.delegate = self
imagePicker.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
imagePicker.allowsEditing = false
self.presentViewController(imagePicker, animated: true, completion: nil)
}
委托方法
func imagePickerController(picker: UIImagePickerController!, didFinishPickingImage image: UIImage!, editingInfo: NSDictionary!) {
self.dismissViewControllerAnimated(true, completion: nil)
imageView.image = image
}