IOS Custom Back button to keep the system sliding back

1. Introduction

Using the iphone, the favorite is to use its sliding back. As a developer, when we write a lot of pages, there is always a reason why the system's sliding back is not available. Use the navigation bar to push out a controller, We have customized a return button in the controller. This way the system defaults to the swipe back gesture effect is gone.

2. Workaround

[1] From a This controller push to b this controller, we want to customize the B's Return button, we can set in a

Self.navigationItem.backBarButtonItem = [[Uibarbuttonitem alloc] initwithtitle:@ "Wang Yu" style: Uibarbuttonitemstyleplain Target:nil Action:nil];

[2] in the B Controller set back button, I think this should be the choice most people like, but when we set in the B controller, we self.navigationItem.leftBarButtonItem found that the system's sliding return gesture failed. So how can you keep the system sliding back gesture, we can do this in the B controller.

@interface  ViewController  ()  @[email protected] ViewController-  (void) viewdidload {        [super viewdidload];         //  Custom return button         uibutton * Button = [[uibutton alloc]initwithframe:cgrectmake (0, 0, 44, 44)];         [button settitle:@ "Wang Yu 2"  forState:UIControlStateNormal];         [button settitlecolor:[uicolor blackcolor] forstate: Uicontrolstatenormal];        [button addtarget:self action: @selector (back:)  forControlEvents:UIControlEventTouchUpInside];         self.navigationitem.leftbarbuttonitem = [[uibarbuttonitem alloc]initwithcustomview:button ];} -  (void) Back: (Uibutton *) button {        [self.navigationcontroller  Popviewcontrolleranimated:yes];} -  (void) Viewwillappear: (BOOL) animated {    [super viewwillappear:animated];     if  (self.navigationcontroller.viewcontrollers.count > 1)  {           //  Record system returns proxy for gesture          _delegate = self.navigationController.interactivePopGestureRecognizer.delegate;           //  set the system return gesture proxy for the current controller          self.navigationController.interactivePopGestureRecognizer.delegate = self;     }}-  (void) Viewwilldisappear: (BOOL) Animated {    [super  viewWillDisappear:animated];     //  set the system return gesture agent for the system we just entered the controller to record the return gesture agent &NBSp;   self.navigationcontroller.interactivepopgesturerecognizer.delegate = _delegate;} #pragma  mark - UIGestureRecognizerDelegate-  (BOOL) Gesturerecognizershouldbegin: ( uigesturerecognizer *) Gesturerecognizer {        return  self.navigationcontroller.childviewcontrollers.count > 1;} -  (BOOL) Gesturerecognizer: (uigesturerecognizer *) gesturerecognizer  Shouldrecognizesimultaneouslywithgesturerecognizer: (uigesturerecognizer *) otherGestureRecognizer {     return self.navigationcontroller.viewcontrollers.count > 1;} @end

IOS Custom Back button, leave the system sliding back