diff --git a/Source/Alert/AlertConfig.swift b/Source/Alert/AlertConfig.swift
index 9d04aff..f7f254f 100644
--- a/Source/Alert/AlertConfig.swift
+++ b/Source/Alert/AlertConfig.swift
@@ -313,6 +313,11 @@ fileprivate var privReloadData: (ProHUD.Alert) -> Void = {
         // 设置持续时间
         vc.vm.updateDuration()
         
+        // id 包含 .rotate 的会自动旋转
+        if vc.vm.scene.identifier.contains(".rotate") {
+            vc.startRotate()
+        }
+        
         // 「隐藏」按钮出现的时间
         vc.vm.hideTimerBlock?.cancel()
         if vc.buttonEvents.count == 0 {
diff --git a/Source/Guard/GuardController.swift b/Source/Guard/GuardController.swift
index d050a7e..c9de5f3 100644
--- a/Source/Guard/GuardController.swift
+++ b/Source/Guard/GuardController.swift
@@ -185,14 +185,14 @@ public extension Guard {
     ///   - identifier: 唯一标识
     ///   - toast: 实例对象
     /// - Returns: 回调
-    @discardableResult class func push(_ identifier: String, to viewController: UIViewController? = nil, _ instance: @escaping (Guard) -> Void) -> Guard {
+    @discardableResult class func push(_ identifier: String, to viewController: UIViewController? = nil, _ instance: ( (Guard) -> Void)? = nil) -> Guard {
         if let g = find(identifier).last {
-            instance(g)
+            instance?(g)
             return g
         } else {
             return Guard() { (gg) in
                 gg.identifier = identifier
-                instance(gg)
+                instance?(gg)
             }.push(to: viewController)
         }
     }
diff --git a/Source/HUDUtils.swift b/Source/HUDUtils.swift
index 4754b81..005edbf 100644
--- a/Source/HUDUtils.swift
+++ b/Source/HUDUtils.swift
@@ -18,3 +18,13 @@ extension ProHUD {
         return Inspire.shared.screen.safeAreaInsets
     }
 }
+
+
+func == (left: ProHUD.Scene, right: ProHUD.Scene) -> Bool {
+    return left.identifier == right.identifier
+}
+
+
+func != (left: ProHUD.Scene, right: ProHUD.Scene) -> Bool {
+    return left.identifier != right.identifier
+}
diff --git a/Source/ProHUD.swift b/Source/ProHUD.swift
index ce983c8..5c3b35d 100644
--- a/Source/ProHUD.swift
+++ b/Source/ProHUD.swift
@@ -40,61 +40,76 @@ public extension ProHUD.Scene {
         id = identifier
     }
     static var `default`: ProHUD.Scene {
-        var scene = ProHUD.Scene.init(identifier: "default")
+        var scene = ProHUD.Scene.init(identifier: "prohud.default")
         scene.image = ProHUD.image(named: "prohud.note")
         return scene
     }
     static var message: ProHUD.Scene {
-        var scene = ProHUD.Scene.init(identifier: "message")
+        var scene = ProHUD.Scene.init(identifier: "prohud.message")
         scene.image = ProHUD.image(named: "prohud.message")
         return scene
     }
     static var loading: ProHUD.Scene {
-        var scene = ProHUD.Scene.init(identifier: "loading")
+        var scene = ProHUD.Scene.init(identifier: "prohud.loading.rotate")
+        scene.image = ProHUD.image(named: "prohud.rainbow.circle")
+        scene.title = "Loading"
         scene.alertDuration = 0
         scene.toastDuration = 0
-        scene.image = ProHUD.image(named: "prohud.rainbow.circle")
         return scene
     }
     static var success: ProHUD.Scene {
-        var scene = ProHUD.Scene.init(identifier: "success")
-        scene.alertDuration = 2
+        var scene = ProHUD.Scene.init(identifier: "prohud.success")
         scene.image = ProHUD.image(named: "prohud.checkmark")
+        scene.title = "Success"
+        scene.alertDuration = 2
         return scene
     }
     static var warning: ProHUD.Scene {
-        var scene = ProHUD.Scene.init(identifier: "warning")
+        var scene = ProHUD.Scene.init(identifier: "prohud.warning")
+        scene.image = ProHUD.image(named: "prohud.exclamationmark")
+        scene.title = "Warning"
+        scene.message = "Something happened."
         scene.alertDuration = 2
         scene.toastDuration = 5
-        scene.image = ProHUD.image(named: "prohud.exclamationmark")
         return scene
     }
     static var error: ProHUD.Scene {
-        var scene = ProHUD.Scene.init(identifier: "error")
+        var scene = ProHUD.Scene.init(identifier: "prohud.error")
+        scene.image = ProHUD.image(named: "prohud.xmark")
+        scene.title = "Error"
+        scene.message = "Please try again later."
         scene.alertDuration = 2
         scene.toastDuration = 5
+        return scene
+    }
+    static var failure: ProHUD.Scene {
+        var scene = ProHUD.Scene.init(identifier: "prohud.failure")
         scene.image = ProHUD.image(named: "prohud.xmark")
+        scene.title = "Failure"
+        scene.message = "Please try again later."
+        scene.alertDuration = 2
+        scene.toastDuration = 5
         return scene
     }
     static var confirm: ProHUD.Scene {
-        var scene = ProHUD.Scene.init(identifier: "confirm")
+        var scene = ProHUD.Scene.init(identifier: "prohud.confirm")
+        scene.image = ProHUD.image(named: "prohud.questionmark")
         scene.alertDuration = 2
         scene.toastDuration = 5
-        scene.image = ProHUD.image(named: "prohud.questionmark")
         return scene
     }
     static var privacy: ProHUD.Scene {
-        var scene = ProHUD.Scene.init(identifier: "privacy")
+        var scene = ProHUD.Scene.init(identifier: "prohud.privacy")
+        scene.image = ProHUD.image(named: "prohud.privacy")
         scene.alertDuration = 2
         scene.toastDuration = 5
-        scene.image = ProHUD.image(named: "prohud.privacy")
         return scene
     }
     static var delete: ProHUD.Scene {
-        var scene = ProHUD.Scene.init(identifier: "delete")
+        var scene = ProHUD.Scene.init(identifier: "prohud.delete")
+        scene.image = ProHUD.image(named: "prohud.trash")
         scene.alertDuration = 2
         scene.toastDuration = 5
-        scene.image = ProHUD.image(named: "prohud.trash")
         return scene
     }