Ios中可拖动的浮动菜单实现

实现一个可拖动的浮动菜单，效果如下：

这个设置图标是可以全屏拖动的，点击一下，可以出现一排设置按钮，可以用来进行功能的开关切换。

废话不多说了，上代码：

////  DragMenuView.h////  Created by Scott on 15-7-27.//  Copyright (c) 2015年 yshen. All rights reserved.//#import <UIKit/UIKit.h>@interface DragMenuView : UIView{    UIButton    *m_selectBtn;    UIView      *m_contentView;}-(id)initDragMenuView;@end

很简单的头文件，就两个变量，一个初始化函数。

m_selectBtn是一个按钮控件，这个控件用来显示上图中那个螺丝刀和扳手的图片，它可以被任意拖动，只要点击它，就可以打开其他设置按钮。

m_contentView

initDragMenuView这个函数是这个类唯一的一个自有函数，它用来创建这个浮动菜单，并初始化浮动菜单。

下面是实现文件：

////  DragMenuView.m//  ////  Created by Scott on 15-7-27.//  Copyright (c) 2015年 yshen. All rights reserved.//#import <QuartzCore/QuartzCore.h>#import "DragMenuView.h"#define MAX_WIDTH           48#define MAX_HEIGHT          48#define SPLIT_SPACE         5#define SETTING_COUNT       1@implementation DragMenuView@synthesize bRotation;- (id)initDragMenuView {    CGRect mainRect = [[UIScreen mainScreen] bounds];    self = [super initWithFrame:CGRectMake(mainRect.size.width - MAX_WIDTH, /*mainRect.size.height / 2 - MAX_HEIGHT / 2*/50, MAX_WIDTH, MAX_HEIGHT)];    if (self)    {        // Initialization code        self.backgroundColor = [UIColor clearColor];                m_selectBtn = [[UIButton alloc]initWithFrame:CGRectMake(0, 0, MAX_WIDTH, MAX_HEIGHT)];        [m_selectBtn setBackgroundImage:[UIImage imageNamed:@"select.png"] forState:UIControlStateNormal];        [m_selectBtn addTarget:self action:@selector(click:) forControlEvents:UIControlEventTouchUpInside];        [self insertSubview:m_selectBtn atIndex:9500];                m_contentView = [[UIView alloc] initWithFrame:CGRectMake(MAX_WIDTH + SPLIT_SPACE, 0, MAX_WIDTH * SETTING_COUNT, MAX_HEIGHT)];        m_contentView.userInteractionEnabled = YES;        m_contentView.hidden = YES;        //m_contentView.backgroundColor = [UIColor grayColor];                UIButton *setting = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, MAX_WIDTH, MAX_HEIGHT)];        [setting setEnabled:NO];        [setting setSelected:NO];        [setting setBackgroundImage:[UIImage imageNamed:@"mic.png"] forState:UIControlStateNormal];        [setting addTarget:self action:@selector(clickVoice:) forControlEvents:UIControlEventTouchUpInside];        [m_contentView addSubview:setting];/*        setting = [[UIButton alloc] initWithFrame:CGRectMake(MAX_HEIGHT, 0, MAX_HEIGHT, MAX_HEIGHT)];        [setting setBackgroundImage:[UIImage imageNamed:@"mic.png"] forState:UIControlStateNormal];        [setting addTarget:self action:@selector(clickAudio:) forControlEvents:UIControlEventTouchUpInside];        [m_contentView addSubview:setting];                setting = [[UIButton alloc] initWithFrame:CGRectMake(MAX_HEIGHT * 2, 0, MAX_HEIGHT, MAX_HEIGHT)];        [setting setBackgroundImage:[UIImage imageNamed:@"mic.png"] forState:UIControlStateNormal];        [setting addTarget:self action:@selector(clickAudio:) forControlEvents:UIControlEventTouchUpInside];        [m_contentView addSubview:setting];                setting = [[UIButton alloc] initWithFrame:CGRectMake(MAX_HEIGHT * 3, 0, MAX_HEIGHT, MAX_HEIGHT)];        [setting setBackgroundImage:[UIImage imageNamed:@"mic.png"] forState:UIControlStateNormal];        [setting addTarget:self action:@selector(clickAudio:) forControlEvents:UIControlEventTouchUpInside];        [m_contentView addSubview:setting];*/        [self insertSubview:m_contentView belowSubview:m_selectBtn];    }        return self;}-(void)layoutMenuView:(BOOL)bShow { // 用户点击设置按钮时，需要弹出或者隐藏设置功能视图。这个视图的显示因为有边界问题，所以需要一些算法调整显示位置    CGRect mainRect = [[UIScreen mainScreen] bounds];    CGRect viewRect = [self frame];        int x = 0, y = viewRect.origin.y, w = 0, h = MAX_HEIGHT;    if (bShow) // 显示    {        w = (MAX_WIDTH * (SETTING_COUNT + 1) + SPLIT_SPACE);        if ((viewRect.origin.x + w) > mainRect.size.width) //右边可显示区域不够显示，需要切换到左边来显示        {            x = viewRect.origin.x - w + MAX_WIDTH;            self.frame = CGRectMake(x, y, w, h);            m_contentView.frame = CGRectMake(0, 0, MAX_WIDTH * SETTING_COUNT, MAX_HEIGHT);            m_selectBtn.frame = CGRectMake(MAX_WIDTH * SETTING_COUNT + SPLIT_SPACE, 0, MAX_WIDTH, MAX_HEIGHT);        }        else // 右边显示区域够了，则直接在右边显示        {            x = viewRect.origin.x;            self.frame = CGRectMake(x, y, w, h);            m_selectBtn.frame = CGRectMake(0, 0, MAX_WIDTH, MAX_HEIGHT);            m_contentView.frame = CGRectMake(MAX_WIDTH + SPLIT_SPACE, 0, MAX_WIDTH * SETTING_COUNT, MAX_HEIGHT);        }    }    else //隐藏    {        w = MAX_WIDTH;        CGRect btnRect = m_selectBtn.frame;        if (btnRect.origin.x == 0) //如果是直接右边显示的，则调整宽度即可隐藏复原        {            x = viewRect.origin.x;            self.frame = CGRectMake(x, y, w, h);        }        else  // 如果是因为可显示区域不够，而调整到左边来显示的话，则需要调整X坐标和宽度。另外还需要重新调整子视图的位置。        {            x = viewRect.origin.x + (MAX_WIDTH * SETTING_COUNT + SPLIT_SPACE);            self.frame = CGRectMake(x, y, w, h);            m_selectBtn.frame = CGRectMake(0, 0, MAX_WIDTH, MAX_HEIGHT);        }    }}-(void)click:(id)sender { // 设置按钮的响应动作，根据当前位置和边界情况来显示设置视图    m_contentView.hidden = !m_contentView.hidden;    [self layoutMenuView:!(m_contentView.hidden)];}-(void)clickVoice:(id)sender { // 设置视图中，功能按钮的响应函数    UIButton *btn = (UIButton*)sender;    [btn setSelected:![btn isSelected]];    [btn setAlpha:([btn isSelected]) ? 0.5f : 1.0f]; // 为了区分点击和未点击状态    // do somthing......}@end

实现代码也就那么一点点，都是很简单的代码。

然后在ViewController中加上变量，并创建这个浮动菜单：

    DragMenuView  *m_dragMenu;    //    // whether support floating menu    // add by yshen on 2015-7-27    //    m_dragMenu = [[DragMenuView alloc]initDragMenuView];    UIPanGestureRecognizer *gesture = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(viewDidDragged:)];    [gesture setMaximumNumberOfTouches:1];    [gesture setMinimumNumberOfTouches:1];    [m_dragMenu addGestureRecognizer:gesture];    [self.view insertSubview:m_dragMenu atIndex:9999];    m_dragMenu.hidden = NO;

手势识别函数：

-(void)viewDidDragged:(UIPanGestureRecognizer*)gesture {    if (gesture.state == UIGestureRecognizerStateChanged || gesture.state == UIGestureRecognizerStateEnded)    {        CGPoint offset = [gesture translationInView:self.view];        int x = m_dragMenu.center.x + offset.x;        int y = m_dragMenu.center.y + offset.y;        [m_dragMenu setCenter:CGPointMake(x, y)];        [gesture setTranslation:CGPointMake(0, 0) inView:self.view];    }}

浮动菜单置顶：

[self.view bringSubviewToFront:m_dragMenu];