如何在iOS 11中使用主从视图禁用向后滑动手势? [英] How to disable swipe back gesture with master-detail view in ios 11?

问题描述

我正尝试禁用向后滑动手势，以便在我的详细信息视图中向后滑动不会打开主视图.

I'm trying to disable the swipe back gesture, so that swiping back in my detail view will not open the master view.

我知道这个问题和此问题存在，但我尝试了所有建议的解决方案，但没有一个对我有用.可能是因为我在iOS 11上.

I'm aware that this question and this question exist, but I have tried all the solutions suggested and none of them have worked for me. It may be because I am on iOS 11.

为演示该问题，我在Xcode中创建了一个新的主从项目，并且仅添加了在链接的问题中看到的解决方案，并添加了以下内容:

To demonstrate the issue, I've created a new master-detail project in Xcode and only added the solutions which I saw in the linked questions, which is adding this:

self.splitViewController.presentsWithGesture = NO;

添加到MasterViewController的 viewDidLoad 并将其添加

To the viewDidLoad of the MasterViewController and adding this

- (void)viewWillLayoutSubviews {
    if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        self.navigationController.navigationController.interactivePopGestureRecognizer.enabled = NO;
    }
}

到DetailViewController

To the DetailViewController

MasterViewController

MasterViewController

#import "MasterViewController.h"
#import "DetailViewController.h"

@interface MasterViewController ()

@property NSMutableArray *objects;
@end

@implementation MasterViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    self.navigationItem.leftBarButtonItem = self.editButtonItem;

    UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(insertNewObject:)];
    self.navigationItem.rightBarButtonItem = addButton;
    self.detailViewController = (DetailViewController *)[[self.splitViewController.viewControllers lastObject] topViewController];
    self.splitViewController.presentsWithGesture = NO;
}


- (void)viewWillAppear:(BOOL)animated {
    self.clearsSelectionOnViewWillAppear = self.splitViewController.isCollapsed;
    [super viewWillAppear:animated];
}


- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}


- (void)insertNewObject:(id)sender {
    if (!self.objects) {
        self.objects = [[NSMutableArray alloc] init];
    }
    [self.objects insertObject:[NSDate date] atIndex:0];
    NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0];
    [self.tableView insertRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
}


#pragma mark - Segues

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    if ([[segue identifier] isEqualToString:@"showDetail"]) {
        NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
        NSDate *object = self.objects[indexPath.row];
        DetailViewController *controller = (DetailViewController *)[[segue destinationViewController] topViewController];
        [controller setDetailItem:object];
        controller.navigationItem.leftBarButtonItem = self.splitViewController.displayModeButtonItem;
        controller.navigationItem.leftItemsSupplementBackButton = YES;
    }
}


#pragma mark - Table View

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return 1;
}


- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return self.objects.count;
}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell" forIndexPath:indexPath];

    NSDate *object = self.objects[indexPath.row];
    cell.textLabel.text = [object description];
    return cell;
}


- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
    // Return NO if you do not want the specified item to be editable.
    return YES;
}


- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
    if (editingStyle == UITableViewCellEditingStyleDelete) {
        [self.objects removeObjectAtIndex:indexPath.row];
        [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
    } else if (editingStyle == UITableViewCellEditingStyleInsert) {
        // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view.
    }
}


@end

DetailViewController

DetailViewController

#import "DetailViewController.h"

@interface DetailViewController ()

@end

@implementation DetailViewController

- (void)configureView {
    // Update the user interface for the detail item.
    if (self.detailItem) {
        self.detailDescriptionLabel.text = [self.detailItem description];
    }
}


- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    [self configureView];
}


- (void)viewWillLayoutSubviews {
    if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        self.navigationController.navigationController.interactivePopGestureRecognizer.enabled = NO;
        self.navigationController.interactivePopGestureRecognizer.enabled = NO;
    }
}


#pragma mark - Managing the detail item

- (void)setDetailItem:(NSDate *)newDetailItem {
    if (_detailItem != newDetailItem) {
        _detailItem = newDetailItem;

        // Update the view.
        [self configureView];
    }
}


@end

AppDelegate

AppDelegate

#import "AppDelegate.h"
#import "DetailViewController.h"

@interface AppDelegate () <UISplitViewControllerDelegate>

@end

@implementation AppDelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
    UISplitViewController *splitViewController = (UISplitViewController *)self.window.rootViewController;
    UINavigationController *navigationController = [splitViewController.viewControllers lastObject];
    navigationController.topViewController.navigationItem.leftBarButtonItem = splitViewController.displayModeButtonItem;
    splitViewController.delegate = self;
    return YES;
}


- (void)applicationWillResignActive:(UIApplication *)application {
    // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
    // Use this method to pause ongoing tasks, disable timers, and invalidate graphics rendering callbacks. Games should use this method to pause the game.
}


- (void)applicationDidEnterBackground:(UIApplication *)application {
    // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
    // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
}


- (void)applicationWillEnterForeground:(UIApplication *)application {
    // Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background.
}


- (void)applicationDidBecomeActive:(UIApplication *)application {
    // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
}


- (void)applicationWillTerminate:(UIApplication *)application {
    // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
}


#pragma mark - Split view

- (BOOL)splitViewController:(UISplitViewController *)splitViewController collapseSecondaryViewController:(UIViewController *)secondaryViewController ontoPrimaryViewController:(UIViewController *)primaryViewController {
    if ([secondaryViewController isKindOfClass:[UINavigationController class]] && [[(UINavigationController *)secondaryViewController topViewController] isKindOfClass:[DetailViewController class]] && ([(DetailViewController *)[(UINavigationController *)secondaryViewController topViewController] detailItem] == nil)) {
        // Return YES to indicate that we have handled the collapse by doing nothing; the secondary controller will be discarded.
        return YES;
    } else {
        return NO;
    }
}

@end

如何禁用向后滑动功能?

How do I disable the swipe back feature?

推荐答案

我知道了.我必须将其添加到我的DetailViewController

I figured it out. I had to add this to my DetailViewController

id savedGestureRecognizerDelegate1;
id savedGestureRecognizerDelegate2;

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
    if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        savedGestureRecognizerDelegate1 = self.navigationController.interactivePopGestureRecognizer.delegate;
        self.navigationController.interactivePopGestureRecognizer.delegate = self;
    }
    if ([self.navigationController.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        savedGestureRecognizerDelegate2 = self.navigationController.navigationController.interactivePopGestureRecognizer.delegate;
        self.navigationController.navigationController.interactivePopGestureRecognizer.delegate = self;
    }
}

- (void)viewWillDisappear:(BOOL)animated {
    [super viewWillDisappear:animated];
    if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        self.navigationController.interactivePopGestureRecognizer.delegate = savedGestureRecognizerDelegate1;
    }
    if ([self.navigationController.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        self.navigationController.navigationController.interactivePopGestureRecognizer.delegate = savedGestureRecognizerDelegate2;
    }
}

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer
{
    if (gestureRecognizer == self.navigationController.interactivePopGestureRecognizer || gestureRecognizer == self.navigationController.navigationController.interactivePopGestureRecognizer) {
        return NO;
    }
    return YES;
}

这是因为拆分视图控制器中有两个导航控制器.保存的手势识别器委托是由于此.

This is because there's two navigation controllers in a split view controller. The saved gesture recognizer delegate is because of this.

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