arrays - 我需要创建一个 UIImages 数组，我在 Swift 中从相机胶卷加载这些图像

Question

这是我的代码:

import UIKit
import Photos //Photos.h del framework Photos
import MediaPlayer
import AssetsLibrary

let reuseIdentifier = "PhotoCell"
let albumName = "My App"

class PhotosViewController: UIViewController, UICollectionViewDataSource,    UICollectionViewDelegate, UICollectionViewDelegateFlowLayout,        UIImagePickerControllerDelegate, UINavigationControllerDelegate {

var assetCollection:PHAssetCollection!
var photoAsset:PHFetchResult!
var imageManager = PHImageManager.defaultManager()
var albumFound:Bool = false

@IBOutlet weak var collectionView: UICollectionView!

@IBAction func creaFilmato(sender: AnyObject) {

    println("Crea il tuo filmato")

    /* With a static array works perfectly
    let img1:UIImage = UIImage(named: "image1.jpg")!
    let img2:UIImage = UIImage(named: "image2.jpg")!
    let img3:UIImage = UIImage(named: "image3.jpg")!

    var array:Array<UIImage> = [img1,img2,img3]*/

    let img1:UIImage = UIImage(named: "image1.jpg")!

    let settings:NSDictionary = CEMovieMaker.videoSettingsWithCodec(AVVideoCodecH264, withWidth: img1.size.width, andHeight: img1.size.height)
    let prova = CEMovieMaker(settings: settings)

    prova.createMovieFromImages([self.photoAsset.copy()], withCompletion: {(success:Bool, fileURL:NSURL!) in

        if(success){

            self.viewMovieAtURL(fileURL)

            /*// Salvo il filmato in cameraRoll

            let library:ALAssetsLibrary = ALAssetsLibrary()

            library.writeVideoAtPathToSavedPhotosAlbum(fileURL, completionBlock: {(assetURL:NSURL!, error) in

            if((error) != nil) {

            println("Errore nel salvataggio del filmato %@",error)
            }

            })*/
        }

    })

    println("Esportato!")

}

func viewMovieAtURL(fileURL:NSURL!)->Void {

    let playerController:MPMoviePlayerViewController = MPMoviePlayerViewController(contentURL: fileURL!)

    playerController.view.frame = self.view.bounds
    self.presentMoviePlayerViewControllerAnimated(playerController)
    playerController.moviePlayer.prepareToPlay()
    playerController.moviePlayer.play()

    self.view.addSubview(playerController.view)

}

在我看来，错误的代码是 [self.photoAsset.copy()]，因为 photoAsset 返回 PHFetchResult 而不是 UIImage 数组。在 Swift 中从 PHFetchResult 获取图像数组的代码是什么？

Answer 1

var images = [UIImage]()
let targetSize: CGSize = // your target size
let contentMode: PHImageContentMode = // your content mode

// photoAsset is an object of type PHFetchResult
photoAsset.enumerateObjectsUsingBlock {
        object, index, stop in

        let options = PHImageRequestOptions()
        options.synchronous = true
        options.deliveryMode = .HighQualityFormat

        PHImageManager.defaultManager().requestImageForAsset(object as PHAsset, targetSize: targetSize, contentMode: contentMode, options: options) {
                image, info in
                images.append(image)
        }
}