添加图片加载超时逻辑

MRFramework/MRFramework/UIControls/Album/MRAlbumDetailViewController.swift

@@ -26,6 +26,7 @@ open class MRAlbumDetailViewController: UIViewController {
     public static var checkedOptions: MRCheckBoxOptions = .defaultCheck(checkboxSize)
     
     public var confirm: ((_ vc: MRAlbumDetailViewController, _ isSelected: Bool) -> Void)?
+    public var requestTimeout: TimeInterval = 20
     
     public var assest: PHAsset!
     public var isSelected = false
@@ -35,6 +36,9 @@ open class MRAlbumDetailViewController: UIViewController {
     private let imageView = UIImageView()
     private let checkButton = UIButton(type: .custom)
     
+    private var requestID: PHImageRequestID?
+    private var countdownor: Countdown?
+    
     private var state: AlbumDetailState = .none {
         didSet {
             stateDidChange()
@@ -110,12 +114,18 @@ extension MRAlbumDetailViewController {
             let options = PHImageRequestOptions()
             options.isNetworkAccessAllowed = true
             options.isSynchronous = true
-            self.imageCache.requestImage(for: self.assest, targetSize: PHImageManagerMaximumSize, contentMode: .default, options: options, resultHandler: { (image, _) in
+            self.requestID = self.imageCache.requestImage(for: self.assest, targetSize: PHImageManagerMaximumSize, contentMode: .default, options: options, resultHandler: { (image, _) in
                 DispatchQueue.main.async {
                     ToastView.hide()
                     completion(image, nil)
                 }
             })
+            weak var weakSelf = self
+            self.countdownor = self.requestTimeout.countdown({ (_, _, _, sec) in
+                if sec <= 0, let `self` = weakSelf, let id = self.requestID {
+                    self.imageCache.cancelImageRequest(id)
+                }
+            })
         }
     }