iPhone 拖放

iPhone 拖/放 的简介

swift
// 首先，需要在 Info.plist 文件中添加以下两个键值对，以启用拖放功能：
// UIFileSharingEnabled - BOOL - YES
// LSSupportsOpeningDocumentsInPlace - BOOL - YES
// 接下来，通过以下代码可以在应用程序中实现拖放功能：
import MobileCoreServices
class ViewController: UIViewController, UIDropInteractionDelegate {
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        let dropInteraction = UIDropInteraction(delegate: self)
        view.addInteraction(dropInteraction)
    }
    
    func dropInteraction(_ interaction: UIDropInteraction, canHandle session: UIDropSession) -> Bool {
        return session.hasItemsConforming(toTypeIdentifiers: [kUTTypeImage as String])
    }
    
    func dropInteraction(_ interaction: UIDropInteraction, sessionDidUpdate session: UIDropSession) -> UIDropProposal {
        return UIDropProposal(operation: .copy)
    }
    
    func dropInteraction(_ interaction: UIDropInteraction, performDrop session: UIDropSession) {
        session.loadObjects(ofClass: UIImage.self) { (items) in
            if let images = items as? [UIImage] {
                // 在这里处理拖放的图片数据
                for image in images {
                    // 进行相应的操作，例如保存、展示等
                }
            }
        }
    }
}