ios侧滑返回：完美解决 interactivePopGestureRecognizer 卡住的

忘是亡心i 2022-08-21 02:29 370阅读 0赞

苹果一直都在人机交互中尽力做到极致，在iOS7中，新增加了一个小小的功能，也就是这个api：self.navigationController.interactivePopGestureRecognizer.enabled = YES;

这个api功能就是在NavigationController堆栈内的UIViewController可以支持右滑手势，也就是不用点击右上角的返回按钮，轻轻在屏幕左边一

滑，屏幕就会返回，随着ios设备屏幕的增大，这个小功能让手指短，拇指大和手残人士看到了福音。

这个功能是好，但是经常我们会有需求定制返回按钮，如果手动定制了返回按钮，这个功能将会失效，也就是自定义了navigationItem的leftBarButtonItem，那么这个手势就会失效。解决方法找到两种

1.重新设置手势的delegate

self.navigationController.interactivePopGestureRecognizer.delegate = (id)self;

2.当然你也可以自己响应这个手势的事件

\[self.navigationController.interactivePopGestureRecognizer addTarget:self action:@selector(handleGesture:)\];

有更多方法以后继续补充，这里可以根据自己需要进行选择，如果只是简单定制了返回按钮，第一种最简单，一句代码搞定。

`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 ) {