Use activate property

Author: kitasuke

Pod/Classes/MenuItemView.swift

@@ -113,12 +113,11 @@ class MenuItemView: UIView {
         let horizontalConstraints = NSLayoutConstraint.constraintsWithVisualFormat("H:|-margin-[view]-margin-|", options: .allZeros, metrics: ["margin": viewMargin.horizontal], views: viewsDictionary)
         let verticalConstraints = NSLayoutConstraint.constraintsWithVisualFormat("V:|-margin@250-[view(height)]-margin@250-|", options: .allZeros, metrics: ["height": viewSize.height, "margin": viewMargin.vertical], views: viewsDictionary)
 
-        addConstraints(horizontalConstraints)
-        addConstraints(verticalConstraints)
+        NSLayoutConstraint.activateConstraints(horizontalConstraints + verticalConstraints)
 
         // use property to change constant value anytime
         widthViewConstraint = NSLayoutConstraint(item: titleView, attribute: NSLayoutAttribute.Width, relatedBy: NSLayoutRelation.Equal, toItem: nil, attribute: NSLayoutAttribute.Width, multiplier: 1.0, constant: viewSize.width)
-        addConstraint(widthViewConstraint)
+        widthViewConstraint.active = true
     }
 
     private func layoutLabel() {
@@ -131,12 +130,11 @@ class MenuItemView: UIView {
         let horizontalConstraints = NSLayoutConstraint.constraintsWithVisualFormat("H:|-margin-[label]-margin-|", options: .allZeros, metrics: ["margin": labelMargin.horizontal], views: viewsDictionary)
         let verticalConstraints = NSLayoutConstraint.constraintsWithVisualFormat("V:|-margin@250-[label(height)]-margin@250-|", options: .allZeros, metrics: ["height": labelSize.height, "margin": labelMargin.vertical], views: viewsDictionary)
 
-        titleView.addConstraints(horizontalConstraints)
-        titleView.addConstraints(verticalConstraints)
+        NSLayoutConstraint.activateConstraints(horizontalConstraints + verticalConstraints)
 
         widthLabelConstraint = NSLayoutConstraint(item: titleLabel, attribute: NSLayoutAttribute.Width, relatedBy: NSLayoutRelation.Equal, toItem: nil, attribute: NSLayoutAttribute.Width, multiplier: 1.0, constant: labelSize.width)
         widthLabelConstraint.priority = 250 // label's width should be calculated by its view's width
-        titleView.addConstraint(widthLabelConstraint)
+        widthLabelConstraint.active = true
     }
 
     // MARK: - Size calculator

Pod/Classes/MenuView.swift

@@ -102,8 +102,7 @@ class MenuView: UIScrollView {
         let horizontalConstraints = NSLayoutConstraint.constraintsWithVisualFormat("H:|[contentView]|", options: .allZeros, metrics: nil, views: viewsDictionary)
         let verticalConstraints = NSLayoutConstraint.constraintsWithVisualFormat("V:|[contentView(==scrollView)]|", options: .allZeros, metrics: nil, views: viewsDictionary)
 
-        addConstraints(horizontalConstraints)
-        addConstraints(verticalConstraints)
+        NSLayoutConstraint.activateConstraints(horizontalConstraints + verticalConstraints)
     }
 
     private func constructMenuItemViews(#titles: [String]) {
@@ -135,8 +134,7 @@ class MenuView: UIScrollView {
 
             let verticalConstraints = NSLayoutConstraint.constraintsWithVisualFormat("V:|[menuItemView]|", options: .allZeros, metrics: nil, views: viewsDicrionary)
 
-            contentView.addConstraints(horizontalConstraints)
-            contentView.addConstraints(verticalConstraints)
+            NSLayoutConstraint.activateConstraints(horizontalConstraints + verticalConstraints)
         }
     }
 

Pod/Classes/PagingMenuController.swift

@@ -156,8 +156,7 @@ public class PagingMenuController: UIViewController, UIScrollViewDelegate {
             verticalConstraints = NSLayoutConstraint.constraintsWithVisualFormat("V:[menuView(height)]|", options: .allZeros, metrics: metrics, views: viewsDictionary)
         }
 
-        view.addConstraints(horizontalConstraints)
-        view.addConstraints(verticalConstraints)
+        NSLayoutConstraint.activateConstraints(horizontalConstraints + verticalConstraints)
     }
 
     private func constructScrollView() {
@@ -183,8 +182,7 @@ public class PagingMenuController: UIViewController, UIScrollViewDelegate {
             verticalConstraints = NSLayoutConstraint.constraintsWithVisualFormat("V:|[scrollView][menuView]", options: .allZeros, metrics: nil, views: viewsDictionary)
         }
 
-        view.addConstraints(horizontalConstraints)
-        view.addConstraints(verticalConstraints)
+        NSLayoutConstraint.activateConstraints(horizontalConstraints + verticalConstraints)
     }
 
     private func constructContentView() {
@@ -198,8 +196,7 @@ public class PagingMenuController: UIViewController, UIScrollViewDelegate {
         let horizontalConstraints = NSLayoutConstraint.constraintsWithVisualFormat("H:|[contentView]|", options: .allZeros, metrics: nil, views: viewsDictionary)
         let verticalConstraints = NSLayoutConstraint.constraintsWithVisualFormat("V:|[contentView(==scrollView)]|", options: .allZeros, metrics: nil, views: viewsDictionary)
 
-        scrollView.addConstraints(horizontalConstraints)
-        scrollView.addConstraints(verticalConstraints)
+        NSLayoutConstraint.activateConstraints(horizontalConstraints + verticalConstraints)
     }
 
     private func constructPagingViewControllers() {
@@ -235,8 +232,7 @@ public class PagingMenuController: UIViewController, UIScrollViewDelegate {
             let horizontalConstraints = NSLayoutConstraint.constraintsWithVisualFormat(horizontalVisualFormat, options: .allZeros, metrics: nil, views: viewsDictionary)
             let verticalConstraints = NSLayoutConstraint.constraintsWithVisualFormat("V:|[pagingView(==scrollView)]|", options: .allZeros, metrics: nil, views: viewsDictionary)
 
-            scrollView.addConstraints(horizontalConstraints)
-            scrollView.addConstraints(verticalConstraints)
+            NSLayoutConstraint.activateConstraints(horizontalConstraints + verticalConstraints)
         }
 
         view.setNeedsLayout()