diff --git a/CCDropDownMenu/SyuDropDownMenu.m b/CCDropDownMenu/SyuDropDownMenu.m
index e5f3785..958b115 100644
--- a/CCDropDownMenu/SyuDropDownMenu.m
+++ b/CCDropDownMenu/SyuDropDownMenu.m
@@ -145,6 +145,14 @@ - (instancetype)initWithNavigationBar:(UINavigationBar *)navigationBar useNaviga
     return self;
 }
 
+- (void)collapse {
+    if(self.isExpanded) {
+        [self animateForClose];
+        [self updateForColor:self.isExpanded?self.inactiveColor:self.activeColor];
+        self.expanded = !self.isExpanded;
+    }
+}
+
 #pragma mark - Private methods
 - (void)commonInitialization {
     self.titleView = [[UIView alloc] init];