iOS实现可拖动的浮动菜单

Fern ·

更新时间:2024-09-20

· 362 次阅读

本文实例为大家分享了iOS实现可拖动的浮动菜单的具体代码，供大家参考，具体内容如下

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];

菜单 IOS

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