iOS 导航栏自带页面右滑pop使用示例
iOS7之后苹果导航控制器增加了一个左侧边缘右滑pop的手势，在非栈底的控制器里面，从左边右滑之后相当于出栈（pop）样子。
以下设置均在自定义的UINavigationController里操作
//默认是YES设置为NO左侧右滑手势就不可用了 self.interactivePopGestureRecognizer.enabled=YES;
也可以通过手势实现右滑
遵守UIGestureRecognizerDelegate协议，设置代理对象，实现一下代理方法即可：
-(void)viewDidAppear:(BOOL)animated{
[superviewDidAppear:animated];
self.navigationController.interactivePopGestureRecognizer.delegate=self;
}
#pragmamark-UIGestureRecognizerDelegate
-(BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer*)gestureRecognizer
{
if(self.viewControllers.count<=1){
returnNO;
}
returnYES;
}
个人的记忆方法：
backBarButtonItem设置下一个页面的返回按钮
leftBarButtonItem设置当前页面的返回按钮
项目中我们多数会自定义左侧返回按钮leftBarButtonItem，这个时候就算设置self.interactivePopGestureRecognizer.enabled=YES了或者实现手势的代理，左边缘的右滑动手势依旧会失效，例如如下代码写过之后，可以验证一下，失效了。
-(void)pushViewController:(UIViewController*)viewControlleranimated:(BOOL)animated
{
if(self.viewControllers.count>0){
/*不是栈底控制器的时候隐藏tabbar*/
viewController.hidesBottomBarWhenPushed=YES;
//设置左边的返回按钮leftBarButtonItem
UIButton*backBtn=[UIButtonbuttonWithType:UIButtonTypeCustom];
backBtn.frame=CGRectMake(0,0,44,44);
backBtn.imageView.contentMode=UIViewContentModeCenter;
backBtn.contentEdgeInsets=UIEdgeInsetsMake(0,0,0,34);
[backBtnsetImage:[UIImageimageNamed:@"rrrr"]forState:UIControlStateNormal];
[backBtnsetImage:[UIImageimageNamed:@"rrrr"]forState:UIControlStateHighlighted];
[backBtnaddTarget:selfaction:@selector(back)forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem*backBtnItem=[[UIBarButtonItemalloc]initWithCustomView:backBtn];
viewController.navigationItem.leftBarButtonItem=backBtnItem;
//此处改为设置backBarButtonItem右滑手势可以用，但自定义按钮不展示！！
}
[superpushViewController:viewControlleranimated:animated];
}
按照如下方式设置backBarButtonItem或leftBarButtonItem，其他不做任何设置，右滑效果可用：
-(void)pushViewController:(UIViewController*)viewControlleranimated:(BOOL)animated
{
if(self.viewControllers.count>0){
/*不是栈底控制器的时候隐藏tabbar*/
viewController.hidesBottomBarWhenPushed=YES;
}
[self.navigationBarsetBackIndicatorImage:[UIImageimageNamed:@"rrrr"]];
[self.navigationBarsetBackIndicatorTransitionMaskImage:[UIImageimageNamed:@"rrrr"]];
UIBarButtonItem*backItem=[[UIBarButtonItemalloc]initWithTitle:@""style:UIBarButtonItemStylePlaintarget:nilaction:nil];
self.navigationItem.backBarButtonItem=backItem;
[superpushViewController:viewControlleranimated:animated];
}
或者
-(void)pushViewController:(UIViewController*)viewControlleranimated:(BOOL)animated
{
if(self.viewControllers.count>0){
/*不是栈底控制器的时候隐藏tabbar*/
viewController.hidesBottomBarWhenPushed=YES;
[self.navigationBarsetBackIndicatorImage:[UIImageimageNamed:@"rrrr"]];
[self.navigationBarsetBackIndicatorTransitionMaskImage:[UIImageimageNamed:@"rrrr"]];
UIBarButtonItem*backItem=[[UIBarButtonItemalloc]initWithTitle:@""style:UIBarButtonItemStylePlaintarget:nilaction:nil];
self.navigationItem.leftBarButtonItem=backItem;
}
[superpushViewController:viewControlleranimated:animated];
}
进过上面的反复测试：在自定义导航栏控制器中backBarButtonItem不能用View视图方法自定义，而leftBarButtonItem可以。
setBackIndicatorImage和setBackIndicatorTransitionMaskImage无论怎么设置都是只能看到setBackIndicatorImage的图片，找不到原因！！！
然后尝试直接在root视图控制器里面设置返回按钮backBarButtonItem的自定义view,右滑手势可用，但是设置leftBarButtonItem就不能使用右滑手势：
-(void)viewDidLoad{
[superviewDidLoad];
//设置左边的返回按钮
UIButton*backBtn=[UIButtonbuttonWithType:UIButtonTypeCustom];
backBtn.frame=CGRectMake(0,0,44,44);
backBtn.imageView.contentMode=UIViewContentModeCenter;
backBtn.contentEdgeInsets=UIEdgeInsetsMake(0,0,0,34);
[backBtnsetImage:[UIImageimageNamed:@"rrrr"]forState:UIControlStateNormal];
[backBtnsetImage:[UIImageimageNamed:@"rrrr"]forState:UIControlStateHighlighted];
[backBtnaddTarget:selfaction:@selector(back)forControlEvents:UIControlEventTouchUpInside];
backBtn.backgroundColor=[UIColorredColor];
[self.navigationController.navigationBarsetBackIndicatorImage:[UIImageimageNamed:@"rrrr"]];
[self.navigationController.navigationBarsetBackIndicatorTransitionMaskImage:[UIImageimageNamed:@"rrrr"]];
UIBarButtonItem*backBtnItem=[[UIBarButtonItemalloc]initWithCustomView:backBtn];
backBtnItem.title=@"";
self.navigationItem.backBarButtonItem=backBtnItem;
}
以上是自己的验证，希望对大家的学习有所帮助，也希望大家多多支持毛票票。