Merge pull request #209 from minhaaan/master

Add cornerRadius

Author: lucdion

README.md

@@ -991,13 +991,17 @@ FlexLayout also adds methods to set common UIView properties.
 
 * **`backgroundColor(_ color: UIColor)`**  
 Set the flex item's UIView background color. 
+* **`cornerRadius(_ value: CGFloat)`**  
+Set the flex item's UIView rounded corner radius.
 
 ###### Usage examples:
 ```swift
   // Create a gray column container and add a black horizontal line separator 
   flex.addItem().backgroundColor(.gray).define { (flex) in
       flex.addItem().height(1).backgroundColor(.black)
-  } 
+  }
+  // Set rounded corner
+  flex.addItem().cornerRadius(12)
 ```
 
 <br>

Sources/Swift/FlexLayout.swift

@@ -1207,6 +1207,23 @@ public final class Flex {
         }
     }
 
+  
+    /**
+     Set the view to rounded corner
+     
+     - Parameter value: value specifies the view's layer cornerRadius.
+     - Returns: flex interface
+     */
+    @discardableResult
+    public func cornerRadius(_ value: CGFloat) -> Flex {
+        if let host = self.view {
+            host.layer.cornerRadius = value
+            return self
+        } else {
+            preconditionFailure("Trying to modify deallocated host view")
+        }
+    }
+    
     //
     // MARK: Display
     //