iOS 之 侧边栏

XMLeftMenuTool.h

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>

@interface XMLeftMenuTool : NSObject

+ (void)xl_showWithRootViewController:(UIViewController *)rootViewController leftViewController:(UIViewController *)leftViewController;

+ (void)xl_hide;

@end

XMLeftMenuTool.m

#import "XMLeftMenuTool.h"
#import "XMAnimateViewController.h"

@implementation XMLeftMenuTool

static UIWindow *_window;

+ (void)xl_showWithRootViewController:(UIViewController *)rootViewController leftViewController:(UIViewController *)leftViewController {
    _window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
    _window.backgroundColor = [UIColor clearColor];
    _window.hidden = NO;

    XMAnimateViewController *viewController = [[XMAnimateViewController alloc] init];

    viewController.view.backgroundColor = [UIColor clearColor];
    viewController.rootViewController = rootViewController;
    viewController.centerViewController = leftViewController;

    UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:viewController];
    navigationController.view.backgroundColor = [UIColor clearColor];
    _window.rootViewController = navigationController;
    [_window addSubview:navigationController.view];
}

+ (void)xl_hide {
    _window.hidden = YES;
    _window.rootViewController = nil;
    _window = nil;
}

@end

XMAnimateViewController.h

#import <UIKit/UIKit.h>

@interface XMAnimateViewController : UIViewController

@property (nonatomic, strong) UIViewController *rootViewController;
@property (nonatomic, strong) UIViewController *centerViewController;
@property (nonatomic, assign) BOOL xl_hideStatusBar;

@end

XMAnimateViewController.M

#import "XMAnimateViewController.h"
#import "XMLeftMenuTool.h"

static CGFloat const animationTime = 0.4;

@interface XMAnimateViewController ()

@property (nonatomic, strong) UIView *xlbackgroundView;
@property (nonatomic, strong) UIViewController *leftController;
@property (nonatomic, assign) BOOL hasShow;

@end

@implementation XMAnimateViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    self.view.backgroundColor = [UIColor clearColor];
    UIView *view = [[UIView alloc] init];
    view.backgroundColor = [UIColor blackColor];
    view.frame = [UIScreen mainScreen].bounds;
    view.alpha = 0;
    [self.view addSubview:view];
    _xlbackgroundView = view;

    // 添加两个手势
    UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(xl_closeSideBarAction)];
    [view addGestureRecognizer:tapGesture];

    UIPanGestureRecognizer *panGestureRec = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(xl_moveViewWithGestureAction:)];
    [self.view addGestureRecognizer:panGestureRec];
}

- (void)setCenterViewController:(UIViewController *)centerViewController {
    [self addChildViewController:centerViewController];
    CGFloat width = [UIScreen mainScreen].bounds.size.width - 50;
    if ([UIScreen mainScreen].bounds.size.width > 375) {
        width -= 50;
    }
    else if ([UIScreen mainScreen].bounds.size.width > 320) {
        width = width - 25;
    }

    centerViewController.view.frame = CGRectMake(-width, 0, width, [UIScreen mainScreen].bounds.size.height);
    [self.view addSubview:centerViewController.view];
    _leftController = centerViewController;
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    if ([self isViewLoaded] && !self.view.window) {
        self.view = nil;
    }
}

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];

    // 是否隐藏 状态栏
    if (!_hasShow) {
        _hasShow = YES;
        _xl_hideStatusBar = YES;

        [UIView animateWithDuration:animationTime animations:^{
            [self setNeedsStatusBarAppearanceUpdate];
            self.rootViewController.navigationController.navigationBar.frame = CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, 64);
        }];

        [self.navigationController setNavigationBarHidden:YES animated:YES];
        [self xl_showAnimation];
    }
}

- (void)viewWillDisappear:(BOOL)animated {
    [super viewWillDisappear:animated];
    [self.navigationController setNavigationBarHidden:NO animated:YES];
}

- (void)xl_showAnimation {
    self.view.userInteractionEnabled = YES;

    CGFloat time = fabs(self.leftController.view.frame.origin.x / self.leftController.view.frame.size.width) * animationTime;

    [UIView animateWithDuration:time animations:^{
        self.leftController.view.frame = CGRectMake(0, 0, self.leftController.view.frame.size.width, [UIScreen mainScreen].bounds.size.height);
        self.xlbackgroundView.alpha = 0.5;
    } completion:^(BOOL finished) {
        self.view.userInteractionEnabled = YES;
    }];
}

- (void)xl_closeAnimation {
    self.view.userInteractionEnabled = NO;
    // 根据当前x，计算隐藏时间
    CGFloat time = (1 - fabs(self.leftController.view.frame.origin.x / self.leftController.view.frame.size.width)) * animationTime;
    [UIView animateWithDuration:time animations:^{
        self.leftController.view.frame = CGRectMake(-self.leftController.view.frame.size.width, 0, self.leftController.view.frame.size.width, [UIScreen mainScreen].bounds.size.height);
        self.xlbackgroundView.alpha = 0.0;
    } completion:^(BOOL finished) {
        // 让状态栏出现
        self.xl_hideStatusBar = NO;
        [UIView animateWithDuration:animationTime animations:^{
            [self setNeedsStatusBarAppearanceUpdate];
        }];
        // 隐藏个人中心
        [XMLeftMenuTool xl_hide];
    }];
}

- (void)xl_closeSideBarAction {
    [self xl_closeAnimation];
}

- (void)xl_moveViewWithGestureAction:(UIPanGestureRecognizer *)gesture {
    // 开始位置
    static CGFloat start_x;
    // 结束位置
    static CGFloat last_x;
    // 改变多少
    static CGFloat duration_x;
    CGPoint touchPoint = [gesture locationInView:[[UIApplication sharedApplication] keyWindow]];
    // 手势开始
    if (gesture.state == UIGestureRecognizerStateBegan) {
        start_x = touchPoint.x;
        last_x = touchPoint.x;
    }
    // 手势改变
    if (gesture.state == UIGestureRecognizerStateChanged) {
        CGFloat current_x = touchPoint.x;
        duration_x = current_x - last_x;
        last_x = current_x;
        CGFloat leftController_x = duration_x + self.leftController.view.frame.origin.x;
        // 如果控制器的x小于宽度直接返回
        if (leftController_x <= -self.leftController.view.frame.size.width) {
            leftController_x = -self.leftController.view.frame.size.width;
        }
        // 如果控制器的x大于0直接返回
        if (leftController_x >= 0) {
            leftController_x = 0;
        }
        // 计算bgView的透明度
        self.xlbackgroundView.alpha = (1 + leftController_x / self.leftController.view.frame.size.width) * 0.5;
        // 设置左边控制器的frame
        [self.leftController.view setFrame:CGRectMake(leftController_x, 0, self.leftController.view.frame.size.width, self.leftController.view.frame.size.height)];
    }
    // 手势结束
    if (gesture.state == UIGestureRecognizerStateEnded) {
        // 结束为止超时屏幕一半
        if (self.leftController.view.frame.origin.x > - self.leftController.view.frame.size.width + [UIScreen mainScreen].bounds.size.width / 2) {
            [self xl_showAnimation];
        } else {
            [self xl_closeAnimation];
        }
    }

}

// MARK: - 控制状态栏
- (BOOL)prefersStatusBarHidden {
    return self.xl_hideStatusBar;
}

//- (UIStatusBarStyle)preferredStatusBarStyle {
//    return UIStatusBarStyleLightContent;
//}

- (UIStatusBarAnimation)preferredStatusBarUpdateAnimation {
    return UIStatusBarAnimationSlide;
}

@end