javafx实现抽屉效果

**MenuViewController.h文件**
#import <UIKit/UIKit.h>

@interface MenuViewController : UIViewController

//左边抽屉控制器,受Menu的左边视图
@property(nonatomic,strong)UIViewController *leftVC;
//根视图控制器:受Menu管理的根视图
@property(nonatomic,strong)UIViewController *rootVC;
//记录抽屉是否打开,默认值是关闭
@property(nonatomic,assign)BOOL isDisplayMenu;



//带一个根视图控制器的初始化方法
//返回一个带根视图控制器的Menu实例
-(instancetype)initWithRootViewController:(UIViewController *)controller;
@end



MenuViewController.m文件**重点内容**
#import "MenuViewController.h"

@interface MenuViewController ()
//手势
@property(nonatomic,strong)UISwipeGestureRecognizer *leftSwipe;
@property(nonatomic,strong)UISwipeGestureRecognizer *rightSwipe;
@end

@implementation MenuViewController
//7:显示与隐藏的功能写好了,现在在添加两个手势 分别调用两个方法就可以了,注意手势要加在根视图控制器的view上面,手势在延展里面声明属性

- (void)viewDidLoad {
    [super viewDidLoad];
//    self.view.backgroundColor = [UIColor redColor];

    [self setDefaultMenuImage];//

    self.isDisplayMenu = NO;//一开始是关闭的
    //初始化向左扫和向右扫的手势
    //左滑
    self.leftSwipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(doLeftAction:)];
    self.leftSwipe.direction = UISwipeGestureRecognizerDirectionLeft;

    [self.rootVC.view addGestureRecognizer:self.leftSwipe];
    //右滑(系统默认就是向右边轻扫)
    self.rightSwipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(doRightAction:)];

    [self.rootVC.view addGestureRecognizer:self.rightSwipe];
}

//再实现两个手势绑定的方法(分别调用显示与隐藏的方法就好了)
#pragma -mark 向左边手势方法
-(void)doLeftAction:(UISwipeGestureRecognizer *)left
{
    [self hideen];

}
-(void)doRightAction:(UISwipeGestureRecognizer *)right
{
    [self show];
}



//1.先实现根控制器的初始化方法
-(instancetype)initWithRootViewController:(UIViewController *)controller
{
    if (self = [super init]) {
        self.rootVC = controller;
    }
    return self;
}
//2.重写左边视图的setter方法
-(void)setLeftVC:(UIViewController *)leftVC
{
    _leftVC = leftVC;
}

//3.重写根视图控制器的方法
-(void)setRootVC:(UIViewController *)rootVC
{
    //对根视图赋值
    _rootVC = rootVC;
    //先判断根视图是否为空,不为空才能进行操作
    if (_rootVC) {
        //将根视图控制器的视图取出来
        UIView *view = _rootVC.view;
        view.frame = self.view.bounds;
        [self.view addSubview:view];//把根视图的view放在菜单上面
        //添加手势
        [view addGestureRecognizer:self.leftSwipe];
        [view addGestureRecognizer:self.rightSwipe];
        [self setDefaultMenuImage];

    }
}

//4.给导航栏的左边按钮添加一张默认的图片
#pragma  -mark 为菜单按钮设置图片
/*
 这里设置导航栏的菜单按钮默认图片,但是有可能没有导航栏 所以需要加上判断
 */
-(void)setDefaultMenuImage
{
    //1.先判断有没有根视图控制器
    if (self.rootVC == nil) {
        return;
    }
    //2.判断根视图控制器是否为导航控制器 因为只有导航控制器才有nvgationBar
    if ([self.rootVC isKindOfClass:[UINavigationController class]]) {
        //注意:设置item的时候要使用当前的视图控制器去 设置,并不是使用导航控制器取设置,做法就是先得到导航控制器,再从导航控制器管理的视图控制器数组中得到当前的的视图控制器,这时就可以设置了

        //2.1为菜单的导航控制器创建一个barButtonItem
        UIBarButtonItem *leftBarButtonItem = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"666"] style:UIBarButtonItemStylePlain target:self action:@selector(leftBarButtonAction:)];
        //2.2先拿到导航控制器
        UINavigationController *firstNav = (UINavigationController *)self.rootVC;
        //2.3再从导航控制器管理的控制器中取出第一个控制器
        UIViewController *first = [[firstNav viewControllers] objectAtIndex:0];
        //2.4给导航栏左边按钮赋值
        first.navigationItem.leftBarButtonItem = leftBarButtonItem;
    }
}
//5.实现左边按钮的绑定方法,在这个方法里面只要判断当前的左边视图是否被打开(显示与隐藏的方法写在下面,这里先直接调用)

//菜单左边按钮执行的方法
-(void)leftBarButtonAction:(UIBarButtonItem *)leftItem
{
    //先判断当前是打开还是关闭
    if (self.isDisplayMenu == NO) {
        [self show];
    }else
    {
        [self hideen];
    }
}

//6实现显示与隐藏左边视图的方法
/*思路:先拿到左边抽屉的视图的view,在设置frame因为左边视图只会显示一部分
 注意点就是拿到的view不能直接addsubview上去,而是要使用insertSubview:atlindex插入,否则会出现别的效果
*/
#pragma mark 显示左边菜单
-(void)show
{
    //1.拿到左边抽屉的视图
    UIView *leftView = self.leftVC.view;
    CGRect frame = self.view.frame;
    frame.size.width = 100;
    //2.设置菜单的大小,宽度为100
    leftView.frame = frame;
    //3.要用插入,因为左边的菜单要在menu的视图下面
    [self.view insertSubview:leftView atIndex:0];
    //(2)第二大步:移动菜单的根视图
    frame = _rootVC.view.frame;//重新赋值
    frame.origin.x = 100;
    [UIView animateWithDuration:1 animations:^{
        _rootVC.view.frame = frame;
        self.isDisplayMenu = YES;

    }];

}
#pragma mark 隐藏左边菜单
-(void)hideen
{
    CGRect frame = _rootVC.view.frame;//重新赋值
    frame.origin.x = 0;
    [UIView animateWithDuration:1 animations:^{
        _rootVC.view.frame = frame;
        self.isDisplayMenu = NO;
    }];
}



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

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/

@end





//LeftViewController.h文件
#import <UIKit/UIKit.h>
#import "AppDelegate.h"
#import "MenuViewController.h"
/*
 抽屉左边视图
 */
@interface LeftViewController : UIViewController<UITableViewDataSource,UITableViewDelegate>

/*
 标题数组
 */
@property(nonatomic,strong)NSMutableArray *leftTitleArray;
/*
 控制器数组
 */
@property(nonatomic,strong)NSMutableArray *viewControllersArray;


 //tableview
@property(nonatomic,strong)UITableView *tableview;

@end




**//LeftViewController.m文件**
#import "LeftViewController.h"

@interface LeftViewController ()

@end

@implementation LeftViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor orangeColor];

    _tableview = [[UITableView alloc] initWithFrame:self.view.bounds style:UITableViewStylePlain];
    [self.view addSubview:_tableview];

    _tableview.delegate = self;
    _tableview.dataSource = self;



}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [_leftTitleArray count];
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *identfier = @"cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identfier];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:identfier];

    }
    cell.textLabel.text = _leftTitleArray[indexPath.row];
    return cell;
}

//重点
#pragma mark 点击单元格跳转到不同的控制器
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    //判断控制器数组是否存在 并且控制器数组与标题数组的个数是否一致
    if (self.viewControllersArray &&(self.leftTitleArray.count == self.viewControllersArray.count)) {
        //1.先取得AppDelegate
        AppDelegate *app = [UIApplication sharedApplication].delegate;
        //2.取得根视图控制器
        MenuViewController *menu = app.menu;
        //3.将打开状态设置为关闭(不设置的话,点击按钮要点击多一次才有反应)
        menu.isDisplayMenu = NO;
        //4.默认给控制加上一个导航控制器
        UINavigationController *navi = [[UINavigationController alloc] initWithRootViewController:self.viewControllersArray[indexPath.row]];
        //5.重新设置视图控制器
        [menu setRootVC:navi];



    }
}

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

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/

@end



//APPDeleget.h文件
#import <UIKit/UIKit.h>
#import "MenuViewController.h"
#import "ViewController.h"
#import "LeftViewController.h"

@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;
@property(nonatomic,strong)MenuViewController *menu;


@end




**//AppDelegate.m文件**
#import "AppDelegate.h"

@interface AppDelegate ()

@end

@implementation AppDelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    //1.创建一个UIWidow对象
//    self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
//    //让window对象可见
//    [self.window makeKeyAndVisible];
    //2.创建第一个页面的视图控制器
    ViewController *readVc = [[ViewController alloc] init];
    readVc.view.backgroundColor = [UIColor yellowColor];
    //设置一个导航控制器
    UINavigationController *firstNav = [[UINavigationController alloc] initWithRootViewController:readVc];
    //为菜单按钮设置根视图控制器
    _menu = [[MenuViewController alloc] initWithRootViewController:firstNav];
    //创建一个左边菜单
    LeftViewController *left = [[LeftViewController alloc] init];
    //左边菜单标题
    left.leftTitleArray = [NSMutableArray arrayWithObjects:@"首页",@"电台",@"阅读", nil];
    //左边菜单控制器
    FirstViewController *two = [[FirstViewController alloc] init];
    SecondViewController *three = [[SecondViewController alloc] init];
    left.viewControllersArray = [NSMutableArray arrayWithObjects:readVc,two,three, nil];
    _menu.leftVC = left;
    self.window.rootViewController = _menu;




    return YES;
}