diff --git a/PHDemo/PHDemo/DemoCapsuleVC.swift b/PHDemo/PHDemo/DemoCapsuleVC.swift
index c941877..a84c79d 100644
--- a/PHDemo/PHDemo/DemoCapsuleVC.swift
+++ b/PHDemo/PHDemo/DemoCapsuleVC.swift
@@ -25,7 +25,7 @@ class DemoCapsuleVC: ListVC {
                 // 设置vm或者handler都会自动push，这里测试传入vm：
                 // Capsule(.message("一条简短消息"))
                 // 如果只有一条文字信息，可以直接传字符串：
-                Capsule("一条简短消息")
+                Capsule("成功")
             }
             section.add(title: "一条稍微长一点的消息") {
                 // 设置vm或者handler都会自动push，这里测试传入handler：
@@ -53,6 +53,9 @@ class DemoCapsuleVC: ListVC {
         }
         
         list.add(title: "默认布局：图文") { section in
+            section.add(title: "短的消息") {
+                Capsule(.icon(.init(systemName: "checkmark.circle.fill")).title("成功"))
+            }
             section.add(title: "下载进度") {
                 let capsule = CapsuleTarget()
                 capsule.vm = .message("正在下载").icon(.init(systemName: "arrow.down.circle.fill")).duration(.infinity)
@@ -191,6 +194,14 @@ class DemoCapsuleVC: ListVC {
             }
         }
         
+        list.add(title: "网络图片") { section in
+            section.add(title: "设置iconSize以修改默认约束尺寸") {
+                Capsule(.icon("https://xaoxuu.com/assets/wiki/prohud/icon.png").title("ProHUD").duration(5)) { capsule in
+                    capsule.config.iconSize = .init(width: 24, height: 24)
+                }
+            }
+        }
+        
     }
 
 }
diff --git a/PHDemo/PHDemo/DemoToastVC.swift b/PHDemo/PHDemo/DemoToastVC.swift
index 748c7dc..0c7157a 100644
--- a/PHDemo/PHDemo/DemoToastVC.swift
+++ b/PHDemo/PHDemo/DemoToastVC.swift
@@ -177,7 +177,7 @@ class DemoToastVC: ListVC {
                 Toast(.title(title).message(message).icon(.init(named: "avatar")).duration(.infinity)) { toast in
                     toast.isRemovable = false
                     toast.imageView.layer.masksToBounds = true
-                    toast.imageView.layer.cornerRadius = toast.config.iconSize.width / 2
+                    toast.imageView.layer.cornerRadius = 44 / 2
                     toast.add(action: "拒绝", style: .destructive) { toast in
                         Alert(.identifier("Dracarys")) { alert in
                             alert.vm = .message("Dracarys")
diff --git a/Sources/ProHUD/Alert/AlertConfiguration.swift b/Sources/ProHUD/Alert/AlertConfiguration.swift
index 5987fb7..6b6309c 100644
--- a/Sources/ProHUD/Alert/AlertConfiguration.swift
+++ b/Sources/ProHUD/Alert/AlertConfiguration.swift
@@ -35,6 +35,11 @@ public class AlertConfiguration: CommonConfiguration {
         customBackgroundViewMask = callback
     }
     
+    /// 最小宽度
+    public var cardMinWidth = CGFloat(32)
+    /// 最小高度
+    public var cardMinHeight = CGFloat(32)
+    
     override var animateDurationForBuildOutByDefault: CGFloat {
         animateDurationForBuildOut ?? 0.2
     }
diff --git a/Sources/ProHUD/Alert/AlertDefaultLayout.swift b/Sources/ProHUD/Alert/AlertDefaultLayout.swift
index a1be0a6..cb38768 100644
--- a/Sources/ProHUD/Alert/AlertDefaultLayout.swift
+++ b/Sources/ProHUD/Alert/AlertDefaultLayout.swift
@@ -150,8 +150,8 @@ extension AlertTarget {
                 imageView.snp.remakeConstraints { (mk) in
                     mk.top.left.greaterThanOrEqualTo(contentView).inset(cardEdgeInsets.top * 2)
                     mk.right.bottom.lessThanOrEqualTo(contentView).inset(cardEdgeInsets.right * 2)
-                    mk.width.equalTo(config.iconSize.width)
-                    mk.height.equalTo(config.iconSize.height)
+                    mk.width.equalTo(config.iconSizeByDefault.width)
+                    mk.height.equalTo(config.iconSizeByDefault.height)
                 }
             }
             if let rotation = vm?.rotation {
diff --git a/Sources/ProHUD/Alert/AlertProvider.swift b/Sources/ProHUD/Alert/AlertProvider.swift
index 1b1f3a8..04ca4fb 100644
--- a/Sources/ProHUD/Alert/AlertProvider.swift
+++ b/Sources/ProHUD/Alert/AlertProvider.swift
@@ -7,7 +7,7 @@
 
 import UIKit
 
-public final class AlertProvider: HUDProviderType {
+open class AlertProvider: HUDProviderType {
     
     public typealias ViewModel = AlertViewModel
     public typealias Target = AlertTarget
diff --git a/Sources/ProHUD/Capsule/CapsuleConfiguration.swift b/Sources/ProHUD/Capsule/CapsuleConfiguration.swift
index 22b855f..8b4e162 100644
--- a/Sources/ProHUD/Capsule/CapsuleConfiguration.swift
+++ b/Sources/ProHUD/Capsule/CapsuleConfiguration.swift
@@ -27,18 +27,21 @@ public class CapsuleConfiguration: CommonConfiguration {
     /// 默认的持续时间
     public var defaultDuration: TimeInterval = 3
     
-    override var cardCornerRadiusByDefault: CGFloat {
-        cardCornerRadius ?? 16
-    }
-    
-    override var cardEdgeInsetsByDefault: UIEdgeInsets {
-        cardEdgeInsets ?? .init(top: 12, left: 16, bottom: 12, right: 16)
-    }
-    
     override var cardMaxWidthByDefault: CGFloat { cardMaxWidth ?? 320 }
     
     override var cardMaxHeightByDefault: CGFloat { cardMaxHeight ?? 120 }
     
+    /// 最小高度
+    public var cardMinHeight = CGFloat(40)
+    
+    override var cardCornerRadiusByDefault: CGFloat { cardCornerRadius ?? 16 }
+    
+    override var cardEdgeInsetsByDefault: UIEdgeInsets {
+        cardEdgeInsets ?? .init(top: 10, left: 16, bottom: 10, right: 16)
+    }
+    
+    override var iconSizeByDefault: CGSize { iconSize ?? .init(width: 20, height: 20) }
+    
     override var animateDurationForBuildInByDefault: CGFloat {
         animateDurationForBuildIn ?? 0.64
     }
diff --git a/Sources/ProHUD/Capsule/CapsuleDefaultLayout.swift b/Sources/ProHUD/Capsule/CapsuleDefaultLayout.swift
index 86fd8b8..ac77829 100644
--- a/Sources/ProHUD/Capsule/CapsuleDefaultLayout.swift
+++ b/Sources/ProHUD/Capsule/CapsuleDefaultLayout.swift
@@ -24,23 +24,21 @@ extension CapsuleTarget: DefaultLayout {
         loadContentViewIfNeeded()
         loadContentMaskViewIfNeeded()
         
-        // image
-        setupImageView()
-        
         // text
-        textLabel.removeFromSuperview()
+        contentStack.addArrangedSubview(textLabel)
         var text = [vm?.title ?? "", vm?.message ?? ""].filter({ $0.count > 0 }).joined(separator: " ")
         if text.count > 0 {
-            contentStack.addArrangedSubview(textLabel)
-            textLabel.snp.makeConstraints { make in
+            textLabel.snp.remakeConstraints { make in
                 make.width.lessThanOrEqualTo(AppContext.appBounds.width * 0.5)
             }
+            textLabel.snp.contentHuggingVerticalPriority = .infinity
             textLabel.text = text
             textLabel.sizeToFit()
-        } else {
-            contentStack.removeArrangedSubview(textLabel)
         }
         
+        // 后设置image, 需要参考text
+        setupImageView()
+        
         view.layoutIfNeeded()
         
         if isViewAppeared {
@@ -91,6 +89,12 @@ extension CapsuleTarget: DefaultLayout {
             contentStack.removeArrangedSubview(imageView)
         } else {
             contentStack.insertArrangedSubview(imageView, at: 0)
+            if config.iconSizeByDefault != .zero {
+                imageView.snp.remakeConstraints { make in
+                    make.height.equalTo(config.iconSizeByDefault)
+                    make.width.equalTo(config.iconSizeByDefault)
+                }
+            }
         }
         imageView.image = vm?.icon
         if let iconURL = vm?.iconURL {
diff --git a/Sources/ProHUD/Capsule/CapsuleManager.swift b/Sources/ProHUD/Capsule/CapsuleManager.swift
index 0da93a1..37fabce 100644
--- a/Sources/ProHUD/Capsule/CapsuleManager.swift
+++ b/Sources/ProHUD/Capsule/CapsuleManager.swift
@@ -48,7 +48,9 @@ extension CapsuleTarget {
         let cardEdgeInsetsByDefault = config.cardEdgeInsetsByDefault
         view.layoutIfNeeded()
         var size = contentStack.frame.size
-        size = CGSize(width: min(config.cardMaxWidthByDefault, size.width + cardEdgeInsetsByDefault.left + cardEdgeInsetsByDefault.right), height: min(config.cardMaxHeightByDefault, size.height + cardEdgeInsetsByDefault.top + cardEdgeInsetsByDefault.bottom))
+        let width = min(config.cardMaxWidthByDefault, size.width + cardEdgeInsetsByDefault.left + cardEdgeInsetsByDefault.right)
+        let height = min(config.cardMaxHeightByDefault, size.height + cardEdgeInsetsByDefault.top + cardEdgeInsetsByDefault.bottom)
+        size = CGSize(width: width, height: max(height, config.cardMinHeight))
         
         // 应用到frame
         let newFrame: CGRect
diff --git a/Sources/ProHUD/Capsule/CapsuleProvider.swift b/Sources/ProHUD/Capsule/CapsuleProvider.swift
index 5047676..10ae9f3 100644
--- a/Sources/ProHUD/Capsule/CapsuleProvider.swift
+++ b/Sources/ProHUD/Capsule/CapsuleProvider.swift
@@ -7,7 +7,7 @@
 
 import UIKit
 
-public final class CapsuleProvider: HUDProviderType {
+open class CapsuleProvider: HUDProviderType {
     
     public typealias ViewModel = CapsuleViewModel
     public typealias Target = CapsuleTarget
diff --git a/Sources/ProHUD/Capsule/CapsuleTarget.swift b/Sources/ProHUD/Capsule/CapsuleTarget.swift
index 5030a85..a8934bf 100644
--- a/Sources/ProHUD/Capsule/CapsuleTarget.swift
+++ b/Sources/ProHUD/Capsule/CapsuleTarget.swift
@@ -18,7 +18,7 @@ open class CapsuleTarget: BaseController, HUDTargetType {
         let stack = StackView()
         stack.spacing = 8
         stack.distribution = .equalCentering
-        stack.alignment = .fill
+        stack.alignment = .center
         stack.axis = .horizontal
         config.customContentStack?(stack)
         return stack
diff --git a/Sources/ProHUD/Core/Models/BaseViewModel.swift b/Sources/ProHUD/Core/Models/BaseViewModel.swift
index 3ef2dc9..a4fd4d8 100644
--- a/Sources/ProHUD/Core/Models/BaseViewModel.swift
+++ b/Sources/ProHUD/Core/Models/BaseViewModel.swift
@@ -101,47 +101,55 @@ open class BaseViewModel: NSObject, HUDViewModelType {
 // MARK: - convenience func
 public extension BaseViewModel {
     
-    func identifier(_ identifier: String?) -> Self {
+    @discardableResult func identifier(_ identifier: String?) -> Self {
         self.identifier = identifier
         return self
     }
     
-    func lazyIdentifier(file: String = #file, line: Int = #line) -> Self {
+    @discardableResult func lazyIdentifier(file: String = #file, line: Int = #line) -> Self {
         self.identifier = (file + "#\(line)")
         return self
     }
     
-    func icon(_ image: UIImage?) -> Self {
+    @discardableResult func icon(_ image: UIImage?) -> Self {
         self.icon = image
         return self
     }
     
-    func icon(_ imageURL: URL?) -> Self {
+    @discardableResult func icon(_ imageURL: URL?) -> Self {
         self.iconURL = imageURL
         return self
     }
     
-    func title(_ text: String?) -> Self {
+    @discardableResult func icon(_ imageURLStr: String) -> Self {
+        if let url = URL(string: imageURLStr) {
+            return icon(url)
+        } else {
+            return icon(.init(named: imageURLStr))
+        }
+    }
+    
+    @discardableResult func title(_ text: String?) -> Self {
         self.title = text
         return self
     }
     
-    func message(_ text: String?) -> Self {
+    @discardableResult func message(_ text: String?) -> Self {
         self.message = text
         return self
     }
     
-    func duration(_ seconds: TimeInterval?) -> Self {
+    @discardableResult func duration(_ seconds: TimeInterval?) -> Self {
         self.duration = seconds
         return self
     }
     
-    func rotation(_ rotation: Rotation?) -> Self {
+    @discardableResult func rotation(_ rotation: Rotation?) -> Self {
         self.rotation = rotation
         return self
     }
     
-    func tintColor(_ tintColor: UIColor?) -> Self {
+    @discardableResult func tintColor(_ tintColor: UIColor?) -> Self {
         self.tintColor = tintColor
         return self
     }
@@ -173,6 +181,16 @@ public extension BaseViewModel {
         .message(text)
     }
     
+    static func icon(_ imageURLStr: String) -> Self {
+        .init().icon(imageURLStr)
+    }
+    static func icon(_ imageURL: URL) -> Self {
+        .init().icon(imageURL)
+    }
+    static func icon(_ image: UIImage?) -> Self {
+        .init().icon(image)
+    }
+    
     // MARK: loading
     static var loading: Self {
         .init()
diff --git a/Sources/ProHUD/Core/Models/Configuration.swift b/Sources/ProHUD/Core/Models/Configuration.swift
index 0bdec18..5c8e19e 100644
--- a/Sources/ProHUD/Core/Models/Configuration.swift
+++ b/Sources/ProHUD/Core/Models/Configuration.swift
@@ -60,10 +60,6 @@ open class CommonConfiguration: NSObject {
     var cardMaxHeightByDefault: CGFloat {
         cardMaxHeight ?? (AppContext.appBounds.height - 100)
     }
-    /// 最小宽度
-    public var cardMinWidth = CGFloat(32)
-    /// 最小高度
-    public var cardMinHeight = CGFloat(32)
     
     /// 卡片内边距
     public var cardEdgeInsets: UIEdgeInsets?
@@ -102,7 +98,9 @@ open class CommonConfiguration: NSObject {
     
     // MARK: 图标样式
     /// 图标尺寸
-    public var iconSize = CGSize(width: 44, height: 44)
+    public var iconSize: CGSize?
+    
+    var iconSizeByDefault: CGSize { iconSize ?? .init(width: 44, height: 44) }
     
     // MARK: 文本样式
     
diff --git a/Sources/ProHUD/Sheet/SheetProvider.swift b/Sources/ProHUD/Sheet/SheetProvider.swift
index e201d8c..55befac 100644
--- a/Sources/ProHUD/Sheet/SheetProvider.swift
+++ b/Sources/ProHUD/Sheet/SheetProvider.swift
@@ -14,7 +14,7 @@ public final class SheetProvider: HUDProviderType {
     
     /// 根据自定义的初始化代码创建一个Target并显示
     /// - Parameter initializer: 初始化代码（传空值时不会做任何事）
-    @discardableResult public required init(initializer: ((_ target: Target) -> Void)?) {
+    @discardableResult public required init(initializer: ((_ sheet: Target) -> Void)?) {
         guard let initializer = initializer else {
             // Provider的作用就是push一个target
             // 如果没有任何初始化代码就没有target，就是个无意义的Provider
diff --git a/Sources/ProHUD/Toast/ToastDefaultLayout.swift b/Sources/ProHUD/Toast/ToastDefaultLayout.swift
index 2abacaf..b721493 100644
--- a/Sources/ProHUD/Toast/ToastDefaultLayout.swift
+++ b/Sources/ProHUD/Toast/ToastDefaultLayout.swift
@@ -33,9 +33,9 @@ extension ToastTarget: DefaultLayout {
                 infoStack.insertArrangedSubview(imageView, at: 0)
                 imageView.snp.makeConstraints { make in
                     if titleCount > 0 && bodyCount > 0 {
-                        make.width.height.equalTo(config.iconSize)
+                        make.width.height.equalTo(config.iconSizeByDefault)
                     } else {
-                        make.width.equalTo(config.iconSize)
+                        make.width.equalTo(config.iconSizeByDefault)
                     }
                 }
             }
diff --git a/Sources/ProHUD/Toast/ToastProvider.swift b/Sources/ProHUD/Toast/ToastProvider.swift
index 9dcdea5..0a3398c 100644
--- a/Sources/ProHUD/Toast/ToastProvider.swift
+++ b/Sources/ProHUD/Toast/ToastProvider.swift
@@ -7,7 +7,7 @@
 
 import UIKit
 
-public final class ToastProvider: HUDProviderType {
+open class ToastProvider: HUDProviderType {
     
     public typealias ViewModel = ToastViewModel
     public typealias Target = ToastTarget