ios侧滑返回：完美解决 interactivePopGestureRecognizer 卡住的问题

浏览数：163 / 时间：2015年06月11日

interactivePopGestureRecognizer是iOS7推出的解决VeiwController滑动后退的新功能,虽然很实用,但是坑也很多啊（比如在rootViewcontroller下，使用侧滑返回手势，可能就卡住了）,这里给出如何完美解决interactivePopGestureRecognizer卡住的问题.

当然我们要自定义UINavigationController来解决这个问题:

#import "MMNavController.h"


@interface MMNavController ()
{
    
}

@end

@implementation MMNavController

- (id)initWithRootViewController:(UIViewController *)rootViewController
{
    self = [super initWithRootViewController:rootViewController];
    if (self) {
        // Custom initialization
        
    }
    return self;
}


- (void)viewDidLoad
{
    
    __weak MMNavController *weakSelf = self;
    
    if ([self respondsToSelector:@selector(interactivePopGestureRecognizer)])
    {
        self.interactivePopGestureRecognizer.delegate = weakSelf;
        
        self.delegate = weakSelf;
    }
    
}

- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated
{
    
    if ( [self respondsToSelector:@selector(interactivePopGestureRecognizer)] && animated == YES )
    {
        self.interactivePopGestureRecognizer.enabled = NO;
    }
    
    [super pushViewController:viewController animated:animated];
    
}

- (NSArray *)popToRootViewControllerAnimated:(BOOL)animated
{
    if ( [self respondsToSelector:@selector(interactivePopGestureRecognizer)] && animated == YES )
    {
        self.interactivePopGestureRecognizer.enabled = NO;
    }
    
    return  [super popToRootViewControllerAnimated:animated];
    
}

- (NSArray *)popToViewController:(UIViewController *)viewController animated:(BOOL)animated
{
    if( [self respondsToSelector:@selector(interactivePopGestureRecognizer)] )
    {
        self.interactivePopGestureRecognizer.enabled = NO;
    }
    
    return [super popToViewController:viewController animated:animated];
    
}

#pragma mark UINavigationControllerDelegate

- (void)navigationController:(UINavigationController *)navigationController
       didShowViewController:(UIViewController *)viewController
                    animated:(BOOL)animate
{
    if ([self respondsToSelector:@selector(interactivePopGestureRecognizer)])
    {
        self.interactivePopGestureRecognizer.enabled = YES;
    }
}


-(BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer
{
    
    if ( gestureRecognizer == self.interactivePopGestureRecognizer )
    {
        if ( self.viewControllers.count < 2 || self.visibleViewController == [self.viewControllers objectAtIndex:0] )
        {
            return NO;
        }
    }
    
    return YES;
}


@end