iOS高仿QQ側(cè)滑效果

效果圖如下：


仁伯安.gif

前言

左滑重點不在動畫效果的實現(xiàn)，而在于左邊視圖事件響應(yīng)后，怎么push進入主視圖的NavigationController，如果主視圖是TabBar的話，要獲取當前TabBar的selecteItem，并push進入對應(yīng)的導(dǎo)航容器中，正文以最為典型的TabBar作為Main主視圖。

實現(xiàn)步驟：

1、首先實現(xiàn)工具類EVNSideSlideViewController，支持左滑和右滑，左視圖-主視圖-右視圖，記得用的時候要將EVNSideSlideViewController做為你的根視圖；
2、左右視圖的設(shè)計及主視圖控制器的設(shè)計，按照原來做；
3、使用單例類記錄主視圖TabBar的選擇狀態(tài)，以便于push到當前頁面所在的NavigationController中；
4、左右視圖單擊事件處理，詳情見，正文的第三部分。

一、工具類EVNSideSlideViewController實現(xiàn)

下面的BaseViewController可以改成UIViewController

EVNSideSlideViewController.h

//
//  EVNSideSlideViewController.h
//  MMB-Saler
//
//  Created by developer on 16/6/28.
//  Copyright ? 2016年 仁伯安. All rights reserved.
//

#import "BaseViewController.h"

@interface EVNSideSlideViewController : BaseViewController
{
@private
    UIImageView * imgBackground;
    CGFloat scalef;
}

@property (strong, nonatomic) UIViewController *leftViewController;
@property (strong, nonatomic) UIViewController *mainViewController;
@property (strong, nonatomic) UIViewController *righViewController;

/**
 *  滑動速度系數(shù)，建議在[0.5, 1]之間，默認為0.5
 */
@property (assign, nonatomic) CGFloat sideSlideSpeed;

/**
 *  初始化，帶有左右滑功能的視圖
 *
 *  @param LeftViewController 左邊設(shè)置的視圖
 *  @param MainViewController 主視圖，可以是TabBarController
 *  @param RighViewController 右滑顯示的視圖
 *  @param image              當前視圖背景圖
 *
 *  @return EVNSideSlideViewController object
 */
- (instancetype)initWithLeftViewController:(UIViewController *)LeftViewController andMainViewController:(UIViewController *)MainViewController andRightViewController:(UIViewController *)RighViewController andBackgroundImage:(UIImage *)image;

/**
 *  顯示主視圖控制器
 */
- (void)showMainViewController;

/**
 *  顯示左視圖控制器
 */
- (void)showLeftViewController;

/**
 *  顯示右視圖控制器
 */
- (void)showRighViewController;

@end

EVNSideSlideViewController.m

//
//  EVNSideSlideViewController.m
//  MMB-Saler
//
//  Created by developer on 16/6/28.
//  Copyright ? 2016年 仁伯安. All rights reserved.
//
#import "EVNSideSlideViewController.h"

@interface EVNSideSlideViewController ()

@end

@implementation EVNSideSlideViewController

- (instancetype)initWithLeftViewController:(UIViewController *)LeftViewController andMainViewController:(UIViewController *)MainViewController andRightViewController:(UIViewController *)RighViewController andBackgroundImage:(UIImage *)image
{
     self = [super init];

    if(self)
    {
        _sideSlideSpeed = 0.5;

        _leftViewController = LeftViewController;
        _mainViewController = MainViewController;
        _righViewController = RighViewController;

        UIImageView * imgview = [[UIImageView alloc]initWithFrame:[UIScreen mainScreen].bounds];
        [imgview setImage:image];
        [self.view addSubview:imgview];

    }
     return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];

    /**
     * 添加滑動手勢
     */
     UIPanGestureRecognizer *panGes = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(handlePan:)];
    [_mainViewController.view addGestureRecognizer:panGes];

    _leftViewController.view.hidden = YES;
    _righViewController.view.hidden = YES;

    [self.view addSubview:_leftViewController.view];
    [self.view addSubview:_righViewController.view];
    [self.view addSubview:_mainViewController.view];

}

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

/**
 *  滑動手勢
 *
 *  @param panGestureRecognizer 滑動手勢
 */
- (void)handlePan:(UIPanGestureRecognizer *)panGestureRecognizer
{

    CGPoint point = [panGestureRecognizer translationInView:self.view];
    scalef = (point.x*_sideSlideSpeed + scalef);
    /**
     *  根據(jù)視圖位置判斷是左滑還是右邊滑動
     */
    if (panGestureRecognizer.view.frame.origin.x >= 0)
    {
        panGestureRecognizer.view.center = CGPointMake(panGestureRecognizer.view.center.x + point.x*_sideSlideSpeed,panGestureRecognizer.view.center.y);
         panGestureRecognizer.view.transform = CGAffineTransformScale(CGAffineTransformIdentity, 1 - scalef/1000, 1 - scalef/1000);
        [panGestureRecognizer setTranslation:CGPointMake(0, 0) inView:self.view];
        _righViewController.view.hidden = YES;
        _leftViewController.view.hidden = NO;
    }
     else
    {
         panGestureRecognizer.view.center = CGPointMake(panGestureRecognizer.view.center.x + point.x*_sideSlideSpeed,panGestureRecognizer.view.center.y);
         panGestureRecognizer.view.transform = CGAffineTransformScale(CGAffineTransformIdentity, 1 + scalef/1000, 1 + scalef/1000);
        [panGestureRecognizer setTranslation:CGPointMake(0, 0) inView:self.view];

        _righViewController.view.hidden = NO;
        _leftViewController.view.hidden = YES;
    }

    /**
     *  有效手勢判斷、并調(diào)整相應(yīng)的視圖
     */
     if (panGestureRecognizer.state == UIGestureRecognizerStateEnded)
    {
         if (scalef > 120*_sideSlideSpeed)
        {
            [self showLeftViewController];
        }
         else if (scalef < - 120*_sideSlideSpeed)
        {
            [self showRighViewController];
        }
        else
        {
            [self showMainViewController];
            scalef = 0;
        }
    }
}

- (void)showMainViewController
{
    [UIView beginAnimations:nil context:nil];
    _mainViewController.view.transform = CGAffineTransformScale(CGAffineTransformIdentity, 1.0, 1.0);
    _mainViewController.view.center = CGPointMake([UIScreen mainScreen].bounds.size.width/2.f, [UIScreen mainScreen].bounds.size.height/2.f);
    [UIView commitAnimations];
}

- (void)showLeftViewController
{
    [UIView beginAnimations:nil context:nil];
    _mainViewController.view.transform = CGAffineTransformScale(CGAffineTransformIdentity, 0.9, 0.9);
    _mainViewController.view.center = CGPointMake([UIScreen mainScreen].bounds.size.width * 3/2.f - 88.f, [UIScreen mainScreen].bounds.size.height/2.f);
    [UIView commitAnimations];
}

- (void)showRighViewController
{
    [UIView beginAnimations:nil context:nil];
    _mainViewController.view.transform = CGAffineTransformScale(CGAffineTransformIdentity, 0.9, 0.9);
    _mainViewController.view.center = CGPointMake(-[UIScreen mainScreen].bounds.size.width/2.f + 88.f, [UIScreen mainScreen].bounds.size.height/2.f);
    [UIView commitAnimations];
}
@end

二、CommonHelper 單例記錄TabBar的狀態(tài)

CommonHelper.h

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

@interface CommonHelper : NSObject<NSCopying, NSMutableCopying>
@property (strong, nonatomic) UIViewController *rootViewController;

 + (instancetype)shareInstance;
- (void)setObjValue;

@end

CommonHelper.m

#import "CommonHelper.h"

 static id _instance;

@implementation CommonHelper


///**
// *  只要系統(tǒng)中引用了該類，程序運行，就會主動調(diào)用load（不用手動調(diào)用，而且只會加載1次）
// */
//+ (void)load
//{
//    _instance = [[CommonHelper alloc] init];
//}

 + (instancetype)allocWithZone:(struct _NSZone *)zone
{
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        _instance = [super allocWithZone:zone];
    });
    return _instance;
}

 + (instancetype)shareInstance
{
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        _instance = [[self alloc] init];
    });
    return _instance;
}

- (id)copyWithZone:(NSZone *)zone
{
    return _instance;
}

- (id)mutableCopyWithZone:(NSZone *)zone
{
    return _instance;
}

// 設(shè)置當前window的根視圖
- (void)setObjValue
{
    [_instance setRootViewController:[[UIApplication sharedApplication] keyWindow].rootViewController];
}

@end

三、左、右視圖點擊事件觸發(fā)寫法

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    CommonHelper *common = [CommonHelper shareInstance];
    [common setObjValue];

    NSLog(@"%@", NSStringFromClass([common.rootViewController class]));
    EVNSideSlideViewController *sideSlideViewController = (EVNSideSlideViewController *)common.rootViewController;
    [sideSlideViewController showMainViewController];

//    NSLog(@"%@", NSStringFromClass(sideSlideViewController.mainViewController));

    BuyerTabbarCtrl *toolController = (BuyerTabbarCtrl *)sideSlideViewController.mainViewController;
    NSInteger selectIndex = toolController.selectedIndex;

//    NSLog(@"%@", NSStringFromClass(toolController.viewControllers[0]));
    
        // 關(guān)于
    AboutMaibeiViewController * aboutMaibeiViewController = [[AboutMaibeiViewController alloc] init];
    aboutMaibeiViewController.hidesBottomBarWhenPushed = YES;
    [toolController.viewControllers[selectIndex] pushViewController:aboutMaibeiViewController animated:YES];
}
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