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 XMLeftMenuToolstatic 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