如何在 ios 11 中使用主从视图禁用向后滑动手势？

Question

我正在尝试禁用向后滑动手势，这样在详细视图中向后滑动就不会打开主视图。

我知道 this question and this question 存在，但我已经尝试了所有建议的解决方案，其中 none 对我有用。可能是因为我在iOS11.

为了演示这个问题，我在 Xcode 中创建了一个新的主从项目，并且只添加了我在链接问题中看到的解决方案，即添加：

self.splitViewController.presentsWithGesture = NO;

到 MasterViewController 的 viewDidLoad 并添加这个

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

到 DetailViewController

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

#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

#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？

Answer 1

self.navigationController.interactivePopGestureRecognizer.enabled = NO;

这条线对我来说绝对有用。不管怎样，我建议你把它移到 viewDidLoad 函数中，这样它就只执行一次。

Answer 2

对于Objective-C：

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

}

对于Swift：

self.navigationController?.interactivePopGestureRecognizer?.isEnabled = false

但不推荐。查找 similar question

Answer 3

我明白了。我必须将它添加到我的 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因为 this.

如何在 ios 11 中使用主从视图禁用向后滑动手势？

How to disable swipe back gesture with master-detail view in ios 11?

objective-c

ios

ios11