小胖说事29-----iOS中Navigation中左滑pop页面的三种方法

第三中类型，自定义任意位置返回页面的方式，上边的类就是.m，大家可以贴过去使用，这个类是继承NavigationController的，用这个类初始化rootController就可以了，这里还有源码可下载，完整的类：http://download.csdn.net/detail/haogaoming123/8906671

1.系统自带pop方法">系统自带pop方法

如果我们没有对navigation中的back按钮进行自定义，我们可以直接使用系统自带的左滑pop方法。但是如果我们对back按钮，进行了自定义，我们就要对self.navigationController.interactivePopGestureRecognizer这个属性进行设置了。关键代码：

__weak typeof(self) weakSelf = self;   self.navigationController.interactivePopGestureRecognizer.delegate = weakSelf;

下面是实例代码：

（继承AbeViewController类，就可以使用系统自带的pop方法。）

@interface AbeViewController ()<uigesturerecognizerdelegate>   @end    @implementation AbeViewController   - (void)viewDidLoad {    [super viewDidLoad];   } - (void)viewDidAppear:(BOOL)animated{    //**************方法一****************//    //设置滑动回退    __weak typeof(self) weakSelf = self;                

self.navigationController.interactivePopGestureRecognizer.delegate = weakSelf;    //判断是否为第一个view    if (self.navigationController && [self.navigationController.viewControllers count] == 1) {        self.navigationController.interactivePopGestureRecognizer.enabled = NO;    }} #pragma mark- UIGestureRecognizerDelegate//**************方法一****************//- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer{    return YES;} @end

2.自定义边缘左滑手势方法

          下面是实例代码：

 就是实现了一个手势方法，触发这个手势方法时pop。（继承AbeViewController类，就可以使用自定义边缘左滑手势的pop方法。）

@interface AbeViewController ()<uigesturerecognizerdelegate>   @end   @implementation AbeViewController   - (void)viewDidLoad {    [super viewDidLoad];   }   - (void)viewDidAppear:(BOOL)animated{    //*************方法二*****************//    UIScreenEdgePanGestureRecognizer *edgePanGestureRecognizer = [[UIScreenEdgePanGestureRecognizer alloc] initWithTarget:self action:@selector(edgePanGesture:)];    edgePanGestureRecognizer.delegate = self;    edgePanGestureRecognizer.edges = UIRectEdgeLeft;    [self.view addGestureRecognizer:edgePanGestureRecognizer];  } - (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];  } #pragma mark- private method//*************方法二*****************//- (void)edgePanGesture:(UIScreenEdgePanGestureRecognizer*)edgePanGestureRecognizer{    [self.navigationController popViewControllerAnimated:YES];}#pragma mark- UIGestureRecognizerDelegate//**************方法二****************//- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer{    if (self.navigationController && [self.navigationController.viewControllers count] == 1) {        return NO;    }    return YES;}@end

3.自定义view任何位置左移pop

      其实就是建立了一个UIPanGestureRecognizer手势，然后该手势触发方法，panGestureRecognizer.state pan的状态。
并且设置self.interactivePopGestureRecognizer.enabled = NO; 原生左滑无效
      下面是实例代码：在view中，任何位置左移触发pop方法。

知识点：[panGestureRecognizer locationInView:XX] 获取pan手势的CGPoint。（继承ABENavViewController类，就可以使用自定义view左滑手势的pop方法； ABENavViewController为UINavigationController的子类。

////  NavigationViewController.m//  BaseProject////  Created by haogaoming on 15/7/13.//  Copyright (c) 2015年 郝高明. All rights reserved.//#import "NavigationViewController.h"@interface NavigationViewController ()@property (nonatomic,strong) UIImageView *backview;@property (nonatomic,strong) NSMutableArray *backImgs;@property (nonatomic,assign) CGPoint panBeginPoint;@property (nonatomic,assign) CGPoint panEndPoint;@end@implementation NavigationViewController- (id)init {    self = [super init];    self.delegate = self;        return self;}- (id)initWithRootViewController:(UIViewController *)rootViewController {    self = [super initWithRootViewController:rootViewController];    self.delegate = self;        return self;}-(void)loadView{    [super loadView];    self.backImgs = [NSMutableArray array];}- (void)viewDidLoad {    [super viewDidLoad];        //原生方法无效    self.interactivePopGestureRecognizer.enabled = NO;        //设置手势    [self.view AddGestureRecognizer:UIPanGestureRecognizerStyle delegate:self Section:@selector(panGestureRecognizerAction:)];}- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation{    return (toInterfaceOrientation == UIInterfaceOrientationPortrait);}- (BOOL)shouldAutorotate{    return NO;}-(UIViewController *)popViewControllerAnimated:(BOOL)animated{    [_backImgs removeLastObject];    return [super popViewControllerAnimated:animated];}- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated {    if (self.viewControllers.count==1) {        viewController.hidesBottomBarWhenPushed = YES;    }    //截图    UIGraphicsBeginImageContextWithOptions([UIScreen mainScreen].bounds.size, YES, 0.0f);    [[UIApplication sharedApplication].keyWindow.layer renderInContext:UIGraphicsGetCurrentContext()];    UIImage *img = UIGraphicsGetImageFromCurrentImageContext();    UIGraphicsEndImageContext();    [self.backImgs addObject:img];        sleep(0.5); //防止没有截频成功    [super pushViewController:viewController animated:animated];}#pragma make-method-(void)panGestureRecognizerAction:(UIPanGestureRecognizer *)panGesture{    if (self.viewControllers.count == 1) {        return;    }    if (panGesture.state == UIGestureRecognizerStateBegan) {        //滑动开始        self.panBeginPoint = [panGesture locationInView:[UIApplication sharedApplication].keyWindow];        //插入图片        [self insertLastViewFromSuperView:self.view.superview];    }else if (panGesture.state == UIGestureRecognizerStateEnded){        //滑动结束        self.panEndPoint = [panGesture locationInView:[UIApplication sharedApplication].keyWindow];        if (self.view.left >= (self.view.width/2.0)-50) {            [UIView animateWithDuration:0.3 animations:^{                [self moveNavigationViewWithLength:[UIScreen mainScreen].bounds.size.width];            } completion:^(BOOL finished) {                [self removeLastViewFromSuperview];                [self moveNavigationViewWithLength:0];                [self popViewControllerAnimated:NO];            }];        }else{            [UIView animateWithDuration:0.3 animations:^{                [self moveNavigationViewWithLength:0];            }];        }    }else{        CGPoint point = [panGesture locationInView:[UIApplication sharedApplication].keyWindow];        //防止右滑        if ((point.x-self.panBeginPoint.x)<0) {            return;        }        [self moveNavigationViewWithLength:(point.x-self.panBeginPoint.x)];    }}/** *  更改frame的位置 * *  @param lenght self.view的left位置 */-(void)moveNavigationViewWithLength:(CGFloat)lenght{    //图片位置设置    self.view.frame = CGRectMake(lenght, self.view.top, self.view.width, self.view.height);    //图片动态阴影    _backview.alpha = (lenght/[UIScreen mainScreen].bounds.size.width)*2/3 + 0.5;}/** *  将背景图插入到当前view的下边，然后通过改变self.view的frame实现滑动 * *  @param supView 画布 */-(void)insertLastViewFromSuperView:(UIView *)supView{    //插入上一级视图背景    if (_backview == nil) {        _backview = [[UIImageView alloc]initWithFrame:[UIScreen mainScreen].bounds];    }   _backview.image = [_backImgs lastObject];

[supView insertSubview:_backview belowSubview:self.view];}/** * 移除背景图 */-(void)removeLastViewFromSuperview{ [_backview removeFromSuperview]; _backview = nil;}- (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated.}@end