增加一个泛型方法。用于类似CSS定义基础类型一样，可预定义多个基础的style，使用时随意组合成一个集合使用。

Example/Source/ViewViewController.swift

@@ -9,6 +9,10 @@
 import UIKit
 import ViewStyle
 
+let redBackground:[MIProperty: Any] = [.backgroundColor: UIColor.red]
+let blueBorder: [MIProperty: Any] = [.layerBorderWidth: 1.0,
+                                     .layerBorderColor: UIColor.blue.cgColor]
+
 class ViewViewController: UIViewController {
 
     override func viewDidLoad() {
@@ -25,7 +29,8 @@ class ViewViewController: UIViewController {
 
         let view2 = UIView(frame: CGRect(x: 10, y: 220, width: 200, height: 100))
         view2.backgroundColor = UIColor.blue
-        view2.mi_styles = self.normalStyle
+//        view2.mi_styles = self.normalStyle
+        view2.mi_updateStyles(styles: self.testStyleGroup)
         view2.mi_styles = self.layerStyle
         self.view.addSubview(view2)
 
@@ -50,11 +55,21 @@ extension ViewViewController {
         ]
     }
 
+    var testStyleGroup: [(MIProperty, Any)] {
+        return [redBackground,
+                [.alpha: 0.5],
+                [.isOpaque: true,
+                 .tintAdjustmentMode: UIViewTintAdjustmentMode.automatic,
+                 .clipsToBounds: true
+                 ],
+                blueBorder,
+                layerStyle
+        ].flatMap({ $0 })
+    }
+
     var layerStyle: [MIProperty: Any] {
         return [
             .clipsToBounds: false,
-            .layerBorderWidth: 1.0,
-            .layerBorderColor: UIColor.red.cgColor,
             .layerShadowRadius: 4.0,
             .layerShadowColor: UIColor.green.cgColor,
             .layerShadowOffset: CGSize(width: 10, height: 10),

Source/Core/UIViewStyle.swift

@@ -32,6 +32,14 @@ extension UIView {
         }
     }
 
+    public func mi_updateStyles<S: Sequence>(styles: S)
+        where S.Iterator.Element == (MIProperty, Any) {
+            print(styles)
+            for (key, value) in styles {
+                mi_setValue(value, forKey: key.rawValue)
+            }
+    }
+
     open func mi_setValue(_ value: Any, forKey key: String) {
 
         let style = MIProperty(rawValue: key)!