iOS SwiftUI 使用 PhotosPicker 从图库中 Select 图像或视频

发布于10月05日

我正在try 使用新的PhotosPicker:

PhotosPicker(
    selection: $selectedItem,
    matching: .videos,
    photoLibrary: .shared()) {
        Text("Select a photo")
    }
    .onChange(of: selectedItem) { newItem in
        Task {
            if let data = try? await newItem?.loadTransferable(type: Data.self) {
                selectedImageData = data
            }
        }
    }

我如何设置为 Select 图像或视频，而不是只 Select 其中之一？

我试过:

matching: [.images, .videos],

并获得:

Cannot convert value of type '[Any]' to expected argument type 'PHPickerFilter?'

推荐答案

解

请注意，matching参数的类型为PHPickerFilter，您可以使用.any(of:)静态函数来组合过滤器.例如:

PhotosPicker("Pick Photo",
             selection: $item,
             matching: .any(of: [.images, .videos])) // <- combine filters

或者假设您想要排除"类型"筛选器

PhotosPicker("Pick Photo",
             selection: $item,
             matching: .any(of: [.images, .not(.videos)])) //<- Use the .not() to exclude filters

示例

让我们以我编写的示例代码为例:

// Other views...
VStack {
            // Pick either photos or videos
            PhotosPicker("Pick **EITHER** Photos or Videos", //<- Bonus tip: You can use markdowns in swift
                         selection: $item,
                         matching: .any(of: [.images, .videos]))
            
            // Filter out photos with the .not() function
            PhotosPicker("Pick **ONLY** Videos",
                         selection: $item,
                         matching: .any(of: [.videos, .not(.images)]))
        }