iOS7之后蘋果導(dǎo)航控制器增加了一個左側(cè)邊緣右滑pop的手勢，在非棧底的控制器里面，從左邊右滑之后相當于出棧（pop）樣子。
以下設(shè)置均在自定義的UINavigationController里操作
// 默認是YES 設(shè)置為NO左側(cè)右滑手勢就不可用了
self.interactivePopGestureRecognizer.enabled = YES;
也可以通過手勢實現(xiàn)右滑
遵守UIGestureRecognizerDelegate協(xié)議，設(shè)置代理對象，實現(xiàn)一下代理方法即可：
-(void)viewDidAppear:(BOOL)animated?{
[superviewDidAppear:animated];
self.navigationController.interactivePopGestureRecognizer.delegate?=?self;
}
#pragma?mark?-?UIGestureRecognizerDelegate
-?(BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer?*)gestureRecognizer
{
if(self.viewControllers.count?<=1)?{
returnNO;
}
returnYES;
}
個人的記憶方法：
backBarButtonItem設(shè)置下一個頁面的返回按鈕
leftBarButtonItem設(shè)置當前頁面的返回按鈕
項目中我們多數(shù)會自定義左側(cè)返回按鈕leftBarButtonItem，這個時候就算設(shè)置self.interactivePopGestureRecognizer.enabled = YES了或者實現(xiàn)手勢的代理，左邊緣的右滑動手勢依舊會失效，例如如下代碼寫過之后，可以驗證一下，失效了。
-?(void)pushViewController:(UIViewController?*)viewController?animated:(BOOL)animated
{
if(self.viewControllers.count?>0)?{
/*?不是棧底控制器的時候隱藏tabbar?*/
viewController.hidesBottomBarWhenPushed?=?YES;
//?設(shè)置左邊的返回按鈕leftBarButtonItem
UIButton?*backBtn?=?[UIButton?buttonWithType:UIButtonTypeCustom];
backBtn.frame?=?CGRectMake(0,0,44,44);
backBtn.imageView.contentMode?=?UIViewContentModeCenter;
backBtn.contentEdgeInsets?=?UIEdgeInsetsMake(0,0,0,34);
[backBtn?setImage:[UIImage?imageNamed:@"rrrr"]?forState:UIControlStateNormal];
[backBtn?setImage:[UIImage?imageNamed:@"rrrr"]?forState:UIControlStateHighlighted];
[backBtn?addTarget:?self?action:?@selector(back)?forControlEvents:?UIControlEventTouchUpInside];
UIBarButtonItem?*backBtnItem=[[UIBarButtonItem?alloc]initWithCustomView:backBtn];
viewController.navigationItem.leftBarButtonItem?=?backBtnItem;
//?此處改為設(shè)置backBarButtonItem?右滑手勢可以用，但自定義按鈕不展示！！
}
[superpushViewController:viewController?animated:animated];
}
按照如下方式設(shè)置backBarButtonItem或leftBarButtonItem，其他不做任何設(shè)置，右滑效果可用：
-?(void)pushViewController:(UIViewController?*)viewController?animated:(BOOL)animated
{
if(self.viewControllers.count?>0)?{
/*?不是棧底控制器的時候隱藏tabbar?*/
viewController.hidesBottomBarWhenPushed?=?YES;
}
[self.navigationBar?setBackIndicatorImage:[UIImage?imageNamed:@"rrrr"]];
[self.navigationBar?setBackIndicatorTransitionMaskImage:[UIImage?imageNamed:@"rrrr"]];
UIBarButtonItem?*backItem?=?[[UIBarButtonItem?alloc]?initWithTitle:@""style:UIBarButtonItemStylePlain?target:nil?action:nil];
self.navigationItem.backBarButtonItem?=?backItem;
[superpushViewController:viewController?animated:animated];
}
或者
-?(void)pushViewController:(UIViewController?*)viewController?animated:(BOOL)animated
{
if(self.viewControllers.count?>0)?{
/*?不是棧底控制器的時候隱藏tabbar?*/
viewController.hidesBottomBarWhenPushed?=?YES;
[self.navigationBar?setBackIndicatorImage:[UIImage?imageNamed:@"rrrr"]];
[self.navigationBar?setBackIndicatorTransitionMaskImage:[UIImage?imageNamed:@"rrrr"]];
UIBarButtonItem?*backItem?=?[[UIBarButtonItem?alloc]?initWithTitle:@""style:UIBarButtonItemStylePlain?target:nil?action:nil];
self.navigationItem.leftBarButtonItem?=?backItem;
}
[superpushViewController:viewController?animated:animated];
}
進過上面的反復(fù)測試：在自定義導(dǎo)航欄控制器中backBarButtonItem不能用View視圖方法自定義，而leftBarButtonItem可以。
setBackIndicatorImage和setBackIndicatorTransitionMaskImage無論怎么設(shè)置都是只能看到setBackIndicatorImage的圖片，找不到原因！??！
然后嘗試直接在root視圖控制器里面設(shè)置返回按鈕backBarButtonItem的自定義view,右滑手勢可用，但是設(shè)置leftBarButtonItem就不能使用右滑手勢：
-?(void)viewDidLoad?{
[superviewDidLoad];
//?設(shè)置左邊的返回按鈕
UIButton?*backBtn?=?[UIButton?buttonWithType:UIButtonTypeCustom];
backBtn.frame?=?CGRectMake(0,0,44,44);
backBtn.imageView.contentMode?=?UIViewContentModeCenter;
backBtn.contentEdgeInsets?=?UIEdgeInsetsMake(0,0,0,34);
[backBtn?setImage:[UIImage?imageNamed:@"rrrr"]?forState:UIControlStateNormal];
[backBtn?setImage:[UIImage?imageNamed:@"rrrr"]?forState:UIControlStateHighlighted];
[backBtn?addTarget:?self?action:?@selector(back)?forControlEvents:?UIControlEventTouchUpInside];
backBtn.backgroundColor?=?[UIColor?redColor];
[self.navigationController.navigationBar?setBackIndicatorImage:[UIImage?imageNamed:@"rrrr"]];
[self.navigationController.navigationBar?setBackIndicatorTransitionMaskImage:[UIImage?imageNamed:@"rrrr"]];
UIBarButtonItem?*backBtnItem=[[UIBarButtonItem?alloc]initWithCustomView:backBtn];
backBtnItem.title?=?@"";
self.navigationItem.backBarButtonItem?=?backBtnItem;
}
以上是自己的驗證，留有很多疑問，期待探討解決。
