lcbasu
diff --git a/‎Dropit/Dropit.xcodeproj/project.xcworkspace/xcuserdata/LokeshBasu.xcuserdatad/UserInterfaceState.xcuserstate‎
2 Bytes b/‎Dropit/Dropit.xcodeproj/project.xcworkspace/xcuserdata/LokeshBasu.xcuserdatad/UserInterfaceState.xcuserstate‎
2 Bytes
diff --git a/‎Dropit/Dropit/DropitViewController.m‎
Lines changed: 12 additions & 0 deletions b/‎Dropit/Dropit/DropitViewController.m‎
Lines changed: 12 additions & 0 deletions
@@ -12,6 +12,7 @@ @interface DropitViewController ()
 @property (weak, nonatomic) IBOutlet UIView *gameView;
 @property (strong, nonatomic) UIDynamicAnimator *animator;
 @property (strong, nonatomic) UIGravityBehavior *gravity;
+@property (strong, nonatomic) UICollisionBehavior *collider;
 @end
 
 @implementation DropitViewController
@@ -36,6 +37,16 @@ - (UIGravityBehavior *)gravity
     return _gravity;
 }
 
+- (UICollisionBehavior *)collider
+{
+    if (!_collider) {
+        _collider = [[UICollisionBehavior alloc] init];
+        _collider.translatesReferenceBoundsIntoBoundary = YES;
+        [self.animator addBehavior:_collider];
+    }
+    return _collider;
+}
+
 - (IBAction)tap:(UITapGestureRecognizer *)sender
 {
     [self drop];
@@ -54,6 +65,7 @@ - (void)drop
     [self.gameView addSubview:dropView];
 
     [self.gravity addItem:dropView];
+    [self.collider addItem:dropView];
 }
 
 - (UIColor *)randomColor