菜单，圆周菜单 动画效果

//
//  CicleMenu.h
//  Learn3
//
//  Created by lance on 14-4-10.
//  Copyright (c) 2014年 Lance. All rights reserved.
//

#import <UIKit/UIKit.h>

@protocol cicleMenuDelegate;

@interface CicleMenu : UIView
{
    UIView *_parentView;
    NSMutableArray *_itemsViewArrays;
    BOOL _isAnimation;
}

@property (nonatomic, strong) NSArray *items;   // image name
@property (nonatomic, assign) float cornerRadius;   // 圆角，
@property (nonatomic, assign) float radius; // 页面半径
@property (nonatomic, assign) float itemHeight; // item 的变长，正方形
@property (nonatomic, strong) NSArray *itemColors;  // item 颜色 未设定，默认是blue
@property (nonatomic, strong) UIView *backgroundView;   // item 所在背景，遮罩层
@property (nonatomic, strong) void (^completion)(); // 动画完成之后相应

@property (nonatomic, assign) id<cicleMenuDelegate> delegate;

- (id)initWithRadius:(float)radius cornerRadisu:(float)cornerRadius itemHeight:(float)itemHeight parentView:(UIView *)parent;

- (void)show;
- (void)hide:(NSInteger)index;

@end


@protocol cicleMenuDelegate <NSObject>

- (void)cicleMenu:(CicleMenu *)cicleMenu onClickWithIndex:(NSInteger)index;

@end


//
//  CicleMenu.m
//  Learn3
//
//  Created by lance on 14-4-10.
//  Copyright (c) 2014年 Lance. All rights reserved.
//

#import "CicleMenu.h"

@implementation CicleMenu

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
    }
    return self;
}

- (id)initWithRadius:(float)radius cornerRadisu:(float)cornerRadius itemHeight:(float)itemHeight parentView:(UIView *)parent
{
    if (parent == nil) {
        @throw @"parent is nil";
        return nil;
    }
    CGPoint centerPoint = parent.center;
    CGRect frame = CGRectMake(centerPoint.x - radius, centerPoint.y - radius, radius * 2, radius * 2);
    
    self = [super initWithFrame:frame];
    if (self) {
        _radius = radius;
        _cornerRadius = cornerRadius;
        _itemHeight = itemHeight;
        _parentView = parent;
        
        _backgroundView = [[UIView alloc] initWithFrame:parent.frame];
        _backgroundView.backgroundColor = [UIColor whiteColor];
        _backgroundView.alpha = 0.3;
        [_parentView addSubview:_backgroundView];
        
    }
    return self;
}

- (void)show
{
    if (_isAnimation) {
        return;
    }
    
    if (_itemsViewArrays) {
        _itemsViewArrays = nil;
    }
    _itemsViewArrays = [NSMutableArray array];
    
    if (_itemColors == nil) {
        _itemColors = @[[UIColor blueColor], [UIColor blueColor], [UIColor blueColor], [UIColor blueColor], [UIColor blueColor]];
    }
    
    _isAnimation = YES;
    
    CGPoint center = _backgroundView.center;
    float angle = 0.0;
    float delaytime = 0.0;
    float x = 0.0;
    float y = 0.0;
    float space = 360.0 / [_items count];
    for (int i = 0; i < [_items count]; i ++) {
        
        delaytime = i * 0.35;
        angle = space * i;
        
        // 计算item的起始坐标
        x = center.x + _radius * sin(angle * M_PI / 180.0) - _itemHeight * 0.5;
        y = center.y + _radius * cos(angle * M_PI / 180.0) - _itemHeight * 0.5;
        
        UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
        [button addTarget:self action:@selector(buttonOnClick:) forControlEvents:UIControlEventTouchUpInside];
        button.frame = CGRectMake(x, y, _itemHeight, _itemHeight);
        button.alpha = 0.0;
        button.tag = i;
        
        UIView *cicleView = [[UIView alloc] initWithFrame:button.frame];
        cicleView.layer.cornerRadius = _cornerRadius;
        cicleView.layer.masksToBounds = YES;
        cicleView.opaque = NO;
        cicleView.backgroundColor = [_itemColors objectAtIndex:i];
        
        UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:[_items objectAtIndex:i]]];
        CGRect frame = imageView.frame;
        frame.origin.x = (CGRectGetWidth(cicleView.frame) - CGRectGetWidth(frame)) * 0.5;
        frame.origin.y = (CGRectGetHeight(cicleView.frame) - CGRectGetHeight(frame)) * 0.5;
        imageView.frame = frame;
        [cicleView addSubview:imageView];
        
        [button setBackgroundImage:[self getImageFromView:cicleView] forState:UIControlStateNormal];
        
        [_backgroundView addSubview:button];
        [_itemsViewArrays addObject:button];
        
        [self performSelector:@selector(animationShow:) withObject:button afterDelay:delaytime];
    }
    
}

- (void)animationShow:(UIButton *)button
{
    [UIView animateWithDuration:0.15 animations:^{
        button.alpha = 1.0;
        button.transform = CGAffineTransformMakeScale(1.2, 1.2);
    } completion:^(BOOL finished) {
        if (finished) {
            [UIView animateWithDuration:0.10 animations:^{
                button.transform = CGAffineTransformMakeScale(0.7, 0.7);
            } completion:^(BOOL finished) {
                if (finished) {
                    [UIView animateWithDuration:0.10 animations:^{
                        button.transform = CGAffineTransformMakeScale(1.0, 1.0);
                    } completion:^(BOOL finished) {
                        if (finished) {
                            if (button.tag == [_items count] - 1) {
                                _isAnimation = NO;
                            }
                        }
                    }];
                }
            }];
        }
    }];
}

- (void)animationHide:(UIButton *)button
{
    [UIView animateWithDuration:0.15 animations:^{
        button.transform = CGAffineTransformMakeScale(1.2, 1.2);
    } completion:^(BOOL finished) {
        if (finished) {
            [UIView animateWithDuration:0.10 animations:^{
                button.transform = CGAffineTransformMakeScale(0.7, 0.7);
            } completion:^(BOOL finished) {
                if (finished) {
                    [UIView animateWithDuration:0.10 animations:^{
                        button.transform = CGAffineTransformMakeScale(1.0, 1.0);
                        button.alpha = 0.0;
                    } completion:^(BOOL finished) {
                        if (finished) {
                            
                            [button removeFromSuperview];
                            [_itemsViewArrays removeObject:button];
                            
                            if ([_itemsViewArrays count] == 0) {
                                [_backgroundView removeFromSuperview];
                                _isAnimation = NO;
                                self.completion();
                            }
                        }
                    }];
                }
            }];
        }
    }];
}

- (void)hide:(NSInteger)index
{
    if (_isAnimation) {
        return;
    }
    
    _isAnimation = YES;
    float delaytime = 0;
    
    int j = 0;
    for (int i = index; i < [_items count] + index; i ++) {
        delaytime = j * 0.35;
        [self performSelector:@selector(animationHide:) withObject:[_itemsViewArrays objectAtIndex:(i % [_items count])] afterDelay:delaytime];
        j ++;
    }
}

- (void)buttonOnClick:(UIButton *)button
{
    if (_isAnimation) {
        return;
    }
    
    if ([self.delegate respondsToSelector:@selector(cicleMenu:onClickWithIndex:)]) {
        [self.delegate cicleMenu:self onClickWithIndex:button.tag];
    }
}

- (UIImage *)getImageFromView:(UIView *)view
{
    UIGraphicsBeginImageContextWithOptions(view.bounds.size, view.opaque, 0.0);
    [view.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return image;
}

@end


调用
//
//  TestViewController.m
//  Learn3
//
//  Created by lance on 14-4-10.
//  Copyright (c) 2014年 Lance. All rights reserved.
//

#import "TestViewController.h"
#import "CicleMenu.h"

@interface TestViewController () <cicleMenuDelegate>
{
    CicleMenu *_cicleMenu;
    UIButton *_button;
}

@end

@implementation TestViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)loadView
{
    [super loadView];
    
    self.view.backgroundColor = [UIColor grayColor];
    
    _button = [UIButton buttonWithType:UIButtonTypeContactAdd];
    _button.frame = CGRectMake(100, 100, 70, 70);
    [_button addTarget:self action:@selector(onClick:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:_button];

}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (void)onClick:(UIButton *)button
{
    button.hidden = YES;
    _cicleMenu = [[CicleMenu alloc] initWithRadius:120.0 cornerRadisu:30.0 itemHeight:80.0 parentView:self.view];
    _cicleMenu.items = @[@"icon-aa-at", @"icon-aa-facebook", @"icon-aa-googleplus", @"icon-aa-twitter", @"icon-aa-tumblr"];
    _cicleMenu.itemColors = @[[UIColor redColor], [UIColor blueColor], [UIColor greenColor], [UIColor orangeColor], [UIColor purpleColor]];
    _cicleMenu.delegate = self;
    [_cicleMenu show];
}

- (void)cicleMenu:(CicleMenu *)cicleMenu onClickWithIndex:(NSInteger)index
{
    [cicleMenu hide:index];
    __block UIButton *button = _button;
    _cicleMenu.completion = ^() {
        button.hidden = NO;
    };
}

@end