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, 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];
[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];以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持编程网。
