diff --git a/Sources/ProHUD/Alert/Alert.swift b/Sources/ProHUD/Alert/Alert.swift
index bdc8677..33eb439 100644
--- a/Sources/ProHUD/Alert/Alert.swift
+++ b/Sources/ProHUD/Alert/Alert.swift
@@ -79,22 +79,22 @@ public class Alert: ProHUD.Controller {
         }
     }
     
-    @discardableResult public init(_ vm: ViewModel?, callback: ((_ alert: Alert) -> Void)? = nil) {
+    @discardableResult public init(_ vm: ViewModel?, handler: ((_ alert: Alert) -> Void)? = nil) {
         super.init()
         if let vm = vm {
             self.vm = vm
         }
-        callback?(self)
+        handler?(self)
         DispatchQueue.main.async {
-            if callback != nil {
+            if handler != nil {
                 self.setDefaultAxis()
                 self.push()
             }
         }
     }
     
-    @discardableResult public convenience init(callback: ((_ alert: Alert) -> Void)?) {
-        self.init(nil, callback: callback)
+    @discardableResult public convenience init(handler: ((_ alert: Alert) -> Void)?) {
+        self.init(nil, handler: handler)
     }
     
     public override func viewDidLoad() {
diff --git a/Sources/ProHUD/Alert/AlertManager.swift b/Sources/ProHUD/Alert/AlertManager.swift
index 0d7d62f..132a044 100644
--- a/Sources/ProHUD/Alert/AlertManager.swift
+++ b/Sources/ProHUD/Alert/AlertManager.swift
@@ -64,28 +64,28 @@ extension Alert: HUD {
     
 }
 
-extension Alert {
+public extension Alert {
     
     /// 如果不存在就创建并弹出一个HUD实例，如果存在就更新实例
     /// - Parameters:
     ///   - identifier: 实例唯一标识符（如果为空，则以代码位置为唯一标识符）
-    ///   - callback: 实例创建代码
-    public static func lazyPush(identifier: String? = nil, file: String = #file, line: Int = #line, callback: @escaping (_ alert: Alert) -> Void) {
+    ///   - handler: 实例创建代码
+    static func lazyPush(identifier: String? = nil, file: String = #file, line: Int = #line, handler: @escaping (_ alert: Alert) -> Void) {
         let id = identifier ?? (file + "#\(line)")
         if let vc = AlertWindow.alerts.last(where: { $0.identifier == id }) {
-            callback(vc)
+            handler(vc)
             vc.reloadData()
         } else {
-            Alert { hud in
-                hud.identifier = id
-                callback(hud)
-            }.push()
+            Alert { alert in
+                alert.identifier = id
+                handler(alert)
+            }
         }
     }
     
     /// 更新HUD实例
     /// - Parameter callback: 实例更新代码
-    public func update(handler: @escaping (_ alert: Alert) -> Void) {
+    func update(handler: @escaping (_ alert: Alert) -> Void) {
         handler(self)
         reloadData()
         UIView.animateEaseOut(duration: config.animateDurationForReloadByDefault) {
@@ -96,7 +96,7 @@ extension Alert {
     /// 查找HUD实例
     /// - Parameter identifier: 唯一标识符
     /// - Returns: HUD实例
-    @discardableResult public static func find(identifier: String, update handler: ((_ alert: Alert) -> Void)? = nil) -> [Alert] {
+    @discardableResult static func find(identifier: String, update handler: ((_ alert: Alert) -> Void)? = nil) -> [Alert] {
         let arr = AlertWindow.alerts.filter({ $0.identifier == identifier })
         if let handler = handler {
             arr.forEach({ $0.update(handler: handler) })
diff --git a/Sources/ProHUD/Sheet/Sheet.swift b/Sources/ProHUD/Sheet/Sheet.swift
index f89c882..31896a6 100644
--- a/Sources/ProHUD/Sheet/Sheet.swift
+++ b/Sources/ProHUD/Sheet/Sheet.swift
@@ -40,11 +40,11 @@ public class Sheet: Controller {
         }
     }
     
-    @discardableResult public init(callback: @escaping (_ sheet: Sheet) -> Void, onTappedBackground action: ((_ sheet: Sheet) -> Void)? = nil) {
+    @discardableResult public init(handler: @escaping (_ sheet: Sheet) -> Void, onTappedBackground action: ((_ sheet: Sheet) -> Void)? = nil) {
         super.init()
         
         onTappedBackground = action
-        callback(self)
+        handler(self)
         
         DispatchQueue.main.async {
             SheetWindow.push(sheet: self)
diff --git a/Sources/ProHUD/Sheet/SheetManager.swift b/Sources/ProHUD/Sheet/SheetManager.swift
index 26b635e..6cdd50c 100644
--- a/Sources/ProHUD/Sheet/SheetManager.swift
+++ b/Sources/ProHUD/Sheet/SheetManager.swift
@@ -19,6 +19,49 @@ extension Sheet: HUD {
     
 }
 
+public extension Sheet {
+    
+    /// 如果不存在就创建并弹出一个HUD实例，如果存在就更新实例
+    /// - Parameters:
+    ///   - identifier: 实例唯一标识符（如果为空，则以代码位置为唯一标识符）
+    ///   - handler: 实例创建代码
+    static func lazyPush(identifier: String? = nil, file: String = #file, line: Int = #line, handler: @escaping (_ sheet: Sheet) -> Void) {
+        let id = identifier ?? (file + "#\(line)")
+        if let vc = find(identifier: id).last {
+            handler(vc)
+            vc.reloadData()
+        } else {
+            Sheet { sheet in
+                sheet.identifier = id
+                handler(sheet)
+            }
+        }
+    }
+    
+    /// 更新HUD实例
+    /// - Parameter handler: 实例更新代码
+    func update(handler: @escaping (_ sheet: Sheet) -> Void) {
+        handler(self)
+        reloadData()
+        UIView.animateEaseOut(duration: config.animateDurationForReloadByDefault) {
+            self.view.layoutIfNeeded()
+        }
+    }
+    
+    /// 查找HUD实例
+    /// - Parameter identifier: 唯一标识符
+    /// - Returns: HUD实例
+    @discardableResult static func find(identifier: String, update handler: ((_ sheet: Sheet) -> Void)? = nil) -> [Sheet] {
+        let arr = SheetWindow.windows.compactMap({ $0.sheet }).filter({ $0.identifier == identifier })
+        if let handler = handler {
+            arr.forEach({ $0.update(handler: handler) })
+        }
+        return arr
+    }
+    
+}
+
+
 extension Sheet {
     
     func translateIn(completion: (() -> Void)?) {
diff --git a/Sources/ProHUD/Toast/Toast.swift b/Sources/ProHUD/Toast/Toast.swift
index 1ac94d1..6013176 100644
--- a/Sources/ProHUD/Toast/Toast.swift
+++ b/Sources/ProHUD/Toast/Toast.swift
@@ -92,21 +92,21 @@ public class Toast: Controller {
     }
     
     
-    @discardableResult public init(_ vm: ViewModel?, callback: ((_ toast: Toast) -> Void)? = nil) {
+    @discardableResult public init(_ vm: ViewModel?, handler: ((_ toast: Toast) -> Void)? = nil) {
         super.init()
         if let vm = vm {
             self.vm = vm
         }
-        callback?(self)
+        handler?(self)
         DispatchQueue.main.async {
-            if callback != nil {
+            if handler != nil {
                 ToastWindow.push(toast: self)
             }
         }
     }
     
-    @discardableResult public convenience init(callback: ((_ toast: Toast) -> Void)?) {
-        self.init(nil, callback: callback)
+    @discardableResult public convenience init(handler: ((_ toast: Toast) -> Void)?) {
+        self.init(nil, handler: handler)
     }
     
     required public init?(coder: NSCoder) {
diff --git a/Sources/ProHUD/Toast/ToastManager.swift b/Sources/ProHUD/Toast/ToastManager.swift
index 734c240..1cb3cfe 100644
--- a/Sources/ProHUD/Toast/ToastManager.swift
+++ b/Sources/ProHUD/Toast/ToastManager.swift
@@ -19,28 +19,28 @@ extension Toast: HUD {
     
 }
 
-extension Toast {
+public extension Toast {
     
     /// 如果不存在就创建并弹出一个HUD实例，如果存在就更新实例
     /// - Parameters:
     ///   - identifier: 实例唯一标识符（如果为空，则以代码位置为唯一标识符）
-    ///   - callback: 实例创建代码
-    public static func lazyPush(identifier: String? = nil, file: String = #file, line: Int = #line, callback: @escaping (_ toast: Toast) -> Void) {
+    ///   - handler: 实例创建代码
+    static func lazyPush(identifier: String? = nil, file: String = #file, line: Int = #line, handler: @escaping (_ toast: Toast) -> Void) {
         let id = identifier ?? (file + "#\(line)")
-        if let vc = ToastWindow.windows.last(where: { $0.toast.identifier == id })?.toast {
-            callback(vc)
+        if let vc = find(identifier: id).last {
+            handler(vc)
             vc.reloadData()
         } else {
-            Toast { hud in
-                hud.identifier = id
-                callback(hud)
-            }.push()
+            Toast { toast in
+                toast.identifier = id
+                handler(toast)
+            }
         }
     }
     
     /// 更新HUD实例
-    /// - Parameter callback: 实例更新代码
-    public func update(handler: @escaping (_ toast: Toast) -> Void) {
+    /// - Parameter handler: 实例更新代码
+    func update(handler: @escaping (_ toast: Toast) -> Void) {
         handler(self)
         reloadData()
         UIView.animateEaseOut(duration: config.animateDurationForReloadByDefault) {
@@ -51,7 +51,7 @@ extension Toast {
     /// 查找HUD实例
     /// - Parameter identifier: 唯一标识符
     /// - Returns: HUD实例
-    @discardableResult public static func find(identifier: String, update handler: ((_ toast: Toast) -> Void)? = nil) -> [Toast] {
+    @discardableResult static func find(identifier: String, update handler: ((_ toast: Toast) -> Void)? = nil) -> [Toast] {
         let arr = ToastWindow.windows.compactMap({ $0.toast }).filter({ $0.identifier == identifier })
         if let handler = handler {
             arr.forEach({ $0.update(handler: handler) })