SwiftUI中瀏覽圖片選中（多選）

在SwiftUI可以實現(xiàn)瀏覽相冊圖片燃少，但是只能選一張束亏，無法多選，功能相對較少阵具，這里可以使用一個庫實現(xiàn)枪汪，當(dāng)然是UIKit庫，方法和自定義uikit控件差不多怔昨，庫名字YPImagePicker，github就有
上代碼

import SwiftUI
import YPImagePicker

struct YPImagePickerView: UIViewControllerRepresentable {
    typealias UIViewControllerType = YPImagePicker
    @Binding var pickeredImgs: [UIImage]
    //@Binding var pickeredVideos: [YPMediaVideo]
    var type: YPPickerScreen
    var startType: YPPickerScreen
    var limit: Int
    
    var warnMax: String {
        if YPPickerScreen.photo == self.type {
            return "最多只能選擇 \(self.limit) 張照片"
        } else {
            return "最多只能選擇 \(self.limit) 個視頻"
        }
    }
    
    func makeUIViewController(context: Context) -> YPImagePicker {
        var config = YPImagePickerConfiguration()
        
        config.isScrollToChangeModesEnabled = true
        config.onlySquareImagesFromCamera = true
        config.usesFrontCamera = false
        config.showsPhotoFilters = true
        config.showsVideoTrimmer = true
        config.colors.filterBackgroundColor = .white
        config.colors.photoVideoScreenBackgroundColor = .white
        config.colors.bottomMenuItemBackgroundColor = .white
        config.colors.libraryScreenBackgroundColor = .white
        config.colors.multipleItemsSelectedCircleColor = UIColor(named: "#0bBB03")
        
        config.shouldSaveNewPicturesToAlbum = true
        config.albumName = "DefaultYPImagePickerAlbumName"
        config.startOnScreen = self.startType
        config.screens = [.library, self.type]
        config.showsCrop = .none
        config.targetImageSize = YPImageSize.original
        config.overlayView = UIView()
        
        config.hidesStatusBar = true
        config.hidesBottomBar = false
        config.preferredStatusBarStyle = UIStatusBarStyle.darkContent

        
        config.maxCameraZoomFactor = 1.0
        
      
        
        config.library.options = nil
        config.library.onlySquare = false
        config.library.isSquareByDefault = true
        config.library.minWidthForItem = nil
        config.library.mediaType = self.type == YPPickerScreen.photo ? YPlibraryMediaType.photo : YPlibraryMediaType.video
        config.library.defaultMultipleSelection = false
        config.library.maxNumberOfItems = self.limit
        config.library.minNumberOfItems = 1
        config.library.numberOfItemsInRow = 4
        config.library.spacingBetweenItems = 1.0
        config.library.skipSelectionsGallery = true
        config.library.preselectedItems = nil
        
        config.wordings.libraryTitle = "相冊"
        config.wordings.cameraTitle = "拍照"
        config.wordings.next = "選好了"
        config.wordings.warningMaxItemsLimit = self.warnMax
        
//        config.video.compression = AVAssetExportPresetHighestQuality
        config.video.fileType = .mov
        config.video.recordingTimeLimit = 60.0
        config.video.libraryTimeLimit = 60.0
        config.video.minimumTimeLimit = 3.0
        config.video.trimmerMaxDuration = 60.0
        config.video.trimmerMinDuration = 3.0
        
        let picker = YPImagePicker(configuration: config)
        picker.didFinishPicking { [unowned picker] items, _ in
              for item in items {
                  switch item {
                  case .photo(let photo):
                      print(photo)
                      self.pickeredImgs.append(photo.modifiedImage ??  photo.originalImage)
                  case .video(let video):
                    print(video)
                    //self.pickeredVideos.append(video)
                  }
              }
            picker.dismiss(animated: true, completion: nil)
        }
//        present(picker, animated: true, completion: nil)
        return picker
    }
    
    func updateUIViewController(_ uiViewController: YPImagePicker, context: Context) {
        UIApplication.shared.endEditing()
    }
}

上面的設(shè)置具體什么意思可以去官網(wǎng)查看代碼宿稀，這里我自定義了4個自定義參數(shù)趁舀，方便在多處使用，
分別是選中后的圖片祝沸，是數(shù)組實現(xiàn)多張圖片獲取矮烹，然后就是打開后的類型，最后一個是最多可選罩锐，建議不超過9張奉狈。
下面實現(xiàn)調(diào)用

 .sheet(isPresented: $showImagePicker, content: {
                        
                        YPImagePickerView(pickeredImgs: self.$image, type: YPPickerScreen.photo, startType: YPPickerScreen.photo, limit: 6)
                        
                    })

這里建議使用sheet打開，不會sheet的就去看看之前的文章
這里傳入的image是UIImage

 @State var image = [UIImage]()

如果獲取后要顯示出來還得把里面的值遍歷出來涩惑，推薦使用一個庫仁期，當(dāng)然你也能自己實現(xiàn)顯示，使用foreach即可便利出來,庫的名稱是WaterfallGrid，如何使用可以自行去github上看看

WaterfallGrid(self.image, id: \.self) {
                        Image(uiImage: $0)
                            .resizable()
                            .scaledToFit()
                            .frame(width: 120, height: 120)
                        
                    }
                    .frame(width: self.width-20, height: 240, alignment: .leading)
                    .gridStyle(columns:3,spacing: 5,padding:  EdgeInsets(top: 0, leading: 3, bottom: 0, trailing: 3))
                    .background(Color.white)

其實這個庫個人覺得不太喜歡跛蛋，我怎么調(diào)都不符合我的預(yù)期熬的，可能是我不會用吧，所以我自己實現(xiàn)了如何放置圖片赊级，這里就不展示了押框，記得嗶哩嗶哩上有人寫了，我改良后還挺好用的理逊。

查看圖片前提是獲取權(quán)限這點別忘了橡伞，然后就是這個庫默認(rèn)是有相機(jī)界面，可直接拍照晋被，也可加濾鏡什么的兑徘。