A couple of UIView subclasses that allows you to include an animated menu in your own iOS applications.
Basically, the library is composed by a couple of UIView subclasses: LCAnimatedMenu and LCMenuItem. LCAnimatedMenu acts as a container for LCMenuItem objects (we'll call them items). You can add as many items as you want, but only five items will be displayed on screen. Since, all the items are added to a scroll view, you can scroll the menu to see the rest of the items previously added. The LCAnimatedMenu class is in charge of animating the entrance of all the items.
Add this line to your podfile:
pod 'LCAnimatedMenu', '~> 1.0'containerView: This is the most important property. You will not see anything if you don't set it. You use this property to tell to LCAnimatedMenu which is its superview (Usually self.view). That's it.
items: It is useful to pass an array containing LCMenuItem objects to be displayed in the menu view. Only pass objects members of the LCMenuIten class, if you don't do it the class will raise an exception at runtime.
animationDuration: Determines in seconds how fast the items are displayed on screen. By default 1 second.
position: A property of type LCAnimatedMenuPosition used to tell to the class where to show the menu: LCAnimatedMenuPositionBottom at the bottom and LCAnimatedMenuPositionTop at the top. by default the menu is displayed at the bottom.
showBelowTopBars: Only works with the menu at the top position. It is an offset that adds some pixels (64.0 exactly) to the menu view to avoid overlap with the top bars (navigation bar and status bar).
delegate: It sets a delegate object for the LCAnimatedMenuDelegate protocol.
borderColor: By default, the items are displayed with an appearance, that is a rounded view. This rounded view has a border and this property sets a color for it. By default is [UIColor grayColor].
lineWidth: It is the width for the border. By default 1.0.
innerColor: As I've mentioned previously, that rounded view has an inner circle. This property sets a color for that circle. By default is [UIColor colorWithWhite:1.0f alpha:0.7f].
actionBlock: Under the hood, each item sends a message to its target (itself) when they are pressed, same way as UIButton do, but, because I prefer blocks, I decided to execute a block based action each time any button is pressed. If you set this property, you don't have to worry about button indexes neither implement delegate methods.
Default configuration look very well in iOS 7 apps.
There are few methods to create both objects. For LCMenuItem there are two:
- (id)initWithImage:(UIImage *)image;
- (id)initWithImage:(UIImage *)image withActionBlock:(ActionBlock)actionBlock;The first initializes an item with an image and the second initializes an item with an image and an action block. The image can cover all the button view and to be of any size. The layer mask, clips the image (assigned to the image property of a UIButton object) to the item bounds and the internal behavior resizes the button to a 50x50 size.
You can initialize an item without an image using the initWithFrame: method.
For the LCAnimatedMenu class you have only one method:
- (id)initWithItems:(NSArray *)items;This method initializes an LCAnimatedMenu object with an array of items (LCMenuItem objects).
It's easy. Follow these few steps:
1. Importing classes: Import both clases in your .m file (Unless your are implementing the protocol methods):
#import "LCAnimatedMenu.h"
#import "LCMenuItem.h"2. Creating items: In the method viewWillAppear:, create as much items as you need. You can initialize an item in many ways, I'll show you two. First, passing the actionBlock property with the inicialization method as an argument:
LCMenuItem *item1 = [[LCMenuItem alloc] initWithImage:[UIImage imageNamed:@"item.png"]
withActionBlock:^(void)
{
// do something cool
}];Or as I prefer, setting the actionBlock property after initialization:
LCMenuItem *item1 = [[LCMenuItem alloc] initWithImage:[UIImage imageNamed:@"item.png"]];
item1.actionBlock = ^(void)
{
// do something cool again
};Both of them do the same work. I leave that decision to you. However, if you don't want to initialize with an image, you can use the initWithFrame: method:
LCMenuItem *item1 = [[LCMenuItem alloc] initWithFrame:CGRectZero];3. Initializing the menu: Initialize the LCAnimatedMenu object passing in the argument the items previously created:
LCAnimatedMenu *menu = [[LCAnimatedMenu alloc] initWithItems:@[item1, item2, item3, item4, item5, item6]];If you want to the class to be the delegate of the LCAnimatedMenuDelegate protocol, you have to set the delegate property to your view controller (and of course, make the class conforms to the protocol):
menu.delegate = self;If you want that the menu to be displayed at the top of the screen, set the position property:
menu.position = LCAnimatedMenuPositionTop;Furthermore, if your screen has an status bar and a navigation bar, and you don't want the menu to be displayed under those bars, you need to set the showBelowTopBars property to YES:
menu.showBelowTopBars = YES;By default, when you tap a menu button, the menu automatically hides. To avoid this, set the property hideMenuAfterTapping to YES:
menu.hideMenuAfterTapping = YES;The last and more important thing to do is set the containerView property. It is usually self.view if you want to show the menu in a normal screen managed by an UIViewController subclass, but you can use any custom view that you want:
menu.containerView = self.view;This little library has a protocol methods, which warns you when the menu is about to be displayed, has been displayed and is about to be hidden respectively:
- (void)willDisplayAnimatedMenu:(LCAnimatedMenu *)animatedMenu;
- (void)didDisplayAnimatedMenu:(LCAnimatedMenu *)animatedMenu;
- (void)willHideAnimatedMenu:(LCAnimatedMenu *)animatedMenu;You can override these methods in your own classes to perform actions in the mentioned states of the animation.
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Copyright (c) 2013 Luis Cardenas. All rights reserved.
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