我們?cè)陂_(kāi)發(fā)過(guò)程中都會(huì)或多或少的遇到過(guò)自定義"返回"按鈕后系統(tǒng)返回手勢(shì)無(wú)法響應(yīng)的情況,下面做一總結(jié):
在iOS7系統(tǒng)中胜榔，自帶了可以通過(guò)右滑返回上一級(jí)頁(yè)面的手勢(shì)眯勾，如果僅僅修改leftBarButtonItem是無(wú)法響應(yīng)這個(gè)手勢(shì)的⊥拭停可以在pushViewController之后加入如下代碼：

    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:button];  
    //在自定義leftBarButtonItem后添加下面代碼就可以完美解決返回手勢(shì)無(wú)效的情況  
    if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {  
        self.navigationController.interactivePopGestureRecognizer.delegate = nil;  
    }  

可以通過(guò)下面方式進(jìn)行返回的事件的捕捉：

    - (void)viewWillDisappear: (BOOL)animated  
    {  
        [super viewWillDisappear: animated];  
        if (![[self.navigationController viewControllers] containsObject: self])  
        {  
            // the view has been removed from the navigation stack, back is probably the cause  
            // this will be slow with a large stack however.  
        }  
    }  

至此网杆，我們就完美解決了iOS7上使用leftBarButtonItem的滑動(dòng)返回問(wèn)題。
同時(shí)可以通過(guò)下面方式,來(lái)解決多次滑動(dòng)之后會(huì)導(dǎo)致界面假死的情況：
在所有除一級(jí)頁(yè)面之外的頁(yè)面的viewDidAppear和viewWillDisappear中加入以下代碼：

- (void)viewWillDisappear:(BOOL)animated {  
    [super viewWillDisappear:animated];  
    //代理置空伊滋，否則會(huì)閃退  
    if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {  
        self.navigationController.interactivePopGestureRecognizer.delegate = nil;  
    }  
}  



- (void)viewDidAppear:(BOOL)animated {  
    [super viewDidAppear:animated];  
    //開(kāi)啟iOS7的滑動(dòng)返回效果  
    if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {  
        //只有在二級(jí)頁(yè)面生效  
        if ([self.navigationController.viewControllers count] == 2) {  
            self.navigationController.interactivePopGestureRecognizer.delegate = self;  
        }  
    }  
}  

同時(shí)在UINavigationcontroller的delegate中實(shí)現(xiàn)以下方法：

- (void)navigationController:(UINavigationController *)navigationController didShowViewController:(UIViewController *)viewController animated:(BOOL)animated {  
    //開(kāi)啟滑動(dòng)手勢(shì)  
    if ([navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {  
        navigationController.interactivePopGestureRecognizer.enabled = YES;  
    }  
}  

在pushviewcontroller之前加入以下代碼：

if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {  
       self.navigationController.interactivePopGestureRecognizer.delegate = NO;  
   }  
   [self.navigationController pushViewController:viewController animated:YES];  

即可在實(shí)現(xiàn)滑動(dòng)返回的同時(shí)碳却，避免界面卡死的問(wèn)題。

同時(shí)我們?cè)趹?yīng)用中還會(huì)遇到一種情況:
在一個(gè)界面中會(huì)使用UIScrollView. 在這時(shí),會(huì)阻擋系統(tǒng)的向右返回手勢(shì),可以通過(guò)下面方式解決:

- (void)viewDidLoad {  
    [super viewDidLoad];  
    .....  
    self.navigationController.interactivePopGestureRecognizer.delegate = self;  
}  

實(shí)現(xiàn)代理方法:

- (BOOL)gestureRecognizer:    (UIGestureRecognizer *)gestureRecognizer shouldRequireFailureOfGestureRecognizer:  (UIGestureRecognizer *)otherGestureRecognizer  
{  
    [otherGestureRecognizer requireGestureRecognizerToFail:gestureRecognizer];  
    return NO;  
}  

當(dāng)然不要忘記制空代理:<否則會(huì)崩潰>

- (void)viewWillDisappear:(BOOL)animated {  
    [super viewWillDisappear:animated];  
    //代理置空笑旺，否則會(huì)閃退  
    if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {  
        self.navigationController.interactivePopGestureRecognizer.delegate = nil;  
    }  
}  

參考:
1: http://blog.csdn.net/zhaoxy_thu/article/details/15811189
2: http://ju.outofmemory.cn/entry/103566

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