VSDropdown is an iOS drop-in solution which can be used to show dropdown below/above any UIView. This class adapts appearance of the button, for which it is shown, which we can customise, and presents itself with appropriate frame and direction. Irrespective of the button’s hierarchy in the window, the dropdown takes touches everywhere on the screen. It dismisses itself when tapped outside its bounds.

Usage

[_dropdown setupDropdownForView:_myButton];

[_dropdown reloadDropdownWithContents:@[@"Hello World",@"Dropdown test",@"Bla Bla bla.."] andSelectedItems:@[_myButton.titleLabel.text]];

If you have an Array containing custom modal classes, for eg. countries array containing Country objects. You want to show value of name property of all Country objects in dropdown list , you can use below method. name should be of NSString type.

[_dropdown reloadDropdownWithContents:self.countries keyPath:@"name" selectedItems:@[_myButton.titleLabel.text]];

##Other adoptParentTheme property can be used when the button has solid background color. When this is YES, the dropdown draws itslef with a gradient color which matches with the button’s background color.

You can tweak the componets of background color using below functions:

-(void)setupDropdownForView:(UIView *)view direction:(Dropdown_Direction)direction withBaseColor:(UIColor *)baseColor scale:(float)scale;
   
-(void)setupDropdownForView:(UIView *)view direction:(Dropdown_Direction)direction withTopColor:(UIColor *)topColor bottomColor:(UIColor *)bottomColor scale:(float)scale;

About Sample

In the sample, there are buttons of different background colors, sizes and fonts. Note that only one VSDropdown instance is used for all the button. Whenever a setupDropDownForView: message is called on VSDropdown instance, it removes itslef from its previous superview, if any, and draws itslef again for the UIButton passed in the argument.

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