如何在UITableViewCell中添加左右全滑及对应功能（Objective-C）

Hey there! Let's break down your two UITableViewCell swipe gesture questions clearly, with practical Objective-C code examples tailored to your needs.

You've got two solid options here—using Apple's native swipe system (the easiest, most consistent with iOS design) or building a custom gesture recognizer for full control.

Option 1: Use Native UITableView Swipe Actions (Recommended) #

This method lets users swipe left (from right to left on the cell) to reveal custom action buttons, and even support full-swipe to trigger the first action automatically.

iOS 11+ Code Example: #

// Implement this UITableViewDelegate method
- (UISwipeActionsConfiguration *)tableView:(UITableView *)tableView trailingSwipeActionsConfigurationForRowAtIndexPath:(NSIndexPath *)indexPath {
    // Create your left-swipe action (e.g., "Mark as Read")
    UIContextualAction *markReadAction = [UIContextualAction contextualActionWithStyle:UIContextualActionStyleNormal 
                                                                                 title:@"Mark Read" 
                                                                               handler:^(UIContextualAction * _Nonnull action, __kindof UIView * _Nonnull sourceView, void (^ _Nonnull completionHandler)(BOOL)) {
        // Put your functionality logic here
        NSLog(@"Marked row %ld as read", indexPath.row);
        // Refresh the cell or update data as needed
        [tableView reloadRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
        // Always call the completion handler when done
        completionHandler(YES);
    }];
    markReadAction.backgroundColor = [UIColor systemGreenColor];

    // Configure the swipe behavior
    UISwipeActionsConfiguration *config = [UISwipeActionsConfiguration configurationWithActions:@[markReadAction]];
    // Allow full-swipe to trigger the first action immediately
    config.performsFirstActionWithFullSwipe = YES;
    return config;
}

iOS 8-10 Compatibility Code: #

// Enable edit mode for cells
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
    return YES;
}

// Define left-swipe actions
- (NSArray<UITableViewRowAction *> *)tableView:(UITableView *)tableView editActionsForRowAtIndexPath:(NSIndexPath *)indexPath {
    UITableViewRowAction *markReadAction = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleNormal 
                                                                               title:@"Mark Read" 
                                                                             handler:^(UITableViewRowAction * _Nonnull action, NSIndexPath * _Nonnull indexPath) {
        // Your functionality here
        NSLog(@"Marked row %ld as read", indexPath.row);
        // Exit edit mode after action
        [tableView setEditing:NO animated:YES];
    }];
    markReadAction.backgroundColor = [UIColor greenColor];
    return @[markReadAction];
}

Option 2: Custom Swipe Gesture Recognizer #

If you need full control over the swipe behavior (no action buttons, just direct trigger on swipe), add a gesture recognizer directly to your cell:

// In your custom UITableViewCell's initialization method
- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {
    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
    if (self) {
        // Add left-swipe gesture (direction = Left means swipe from right to left)
        UISwipeGestureRecognizer *leftSwipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(leftSwipeTriggered:)];
        leftSwipe.direction = UISwipeGestureRecognizerDirectionLeft;
        [self addGestureRecognizer:leftSwipe];
    }
    return self;
}

// Handle the swipe trigger
- (void)leftSwipeTriggered:(UISwipeGestureRecognizer *)gesture {
    // Use a delegate to pass the event to your view controller
    if ([self.delegate respondsToSelector:@selector(cellDidTriggerLeftSwipe:)]) {
        [self.delegate cellDidTriggerLeftSwipe:self];
    }
}

// In your view controller's delegate method
- (void)cellDidTriggerLeftSwipe:(CustomTableViewCell *)cell {
    NSIndexPath *indexPath = [self.tableView indexPathForCell:cell];
    NSLog(@"Left swipe triggered on row %ld", indexPath.row);
    // Execute your custom logic here
}

Depending on how you implemented the left swipe, here's how to add the right swipe:

If You Used Native UITableView Swipe Actions #

iOS 11+ supports both left and right swipe actions natively—just add the leading swipe configuration method:

// Implement this UITableViewDelegate method for right-swipe (swipe from left to right)
- (UISwipeActionsConfiguration *)tableView:(UITableView *)tableView leadingSwipeActionsConfigurationForRowAtIndexPath:(NSIndexPath *)indexPath {
    UIContextualAction *shareAction = [UIContextualAction contextualActionWithStyle:UIContextualActionStyleNormal 
                                                                              title:@"Share" 
                                                                            handler:^(UIContextualAction * _Nonnull action, __kindof UIView * _Nonnull sourceView, void (^ _Nonnull completionHandler)(BOOL)) {
        // Your share functionality here
        NSLog(@"Sharing row %ld content", indexPath.row);
        completionHandler(YES);
    }];
    shareAction.backgroundColor = [UIColor systemBlueColor];

    UISwipeActionsConfiguration *config = [UISwipeActionsConfiguration configurationWithActions:@[shareAction]];
    config.performsFirstActionWithFullSwipe = YES;
    return config;
}

The system automatically handles gesture conflicts between left and right swipes—no extra work needed!

If You Used a Custom Gesture Recognizer #

Just add a second gesture recognizer for right swipes to your custom cell:

// In your custom UITableViewCell's initialization method
- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {
    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
    if (self) {
        // Existing left-swipe gesture (keep this)
        UISwipeGestureRecognizer *leftSwipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(leftSwipeTriggered:)];
        leftSwipe.direction = UISwipeGestureRecognizerDirectionLeft;
        [self addGestureRecognizer:leftSwipe];

        // Add right-swipe gesture (direction = Right means swipe from left to right)
        UISwipeGestureRecognizer *rightSwipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(rightSwipeTriggered:)];
        rightSwipe.direction = UISwipeGestureRecognizerDirectionRight;
        [self addGestureRecognizer:rightSwipe];
    }
    return self;
}

// Handle right-swipe trigger
- (void)rightSwipeTriggered:(UISwipeGestureRecognizer *)gesture {
    if ([self.delegate respondsToSelector:@selector(cellDidTriggerRightSwipe:)]) {
        [self.delegate cellDidTriggerRightSwipe:self];
    }
}

// In your view controller's delegate method
- (void)cellDidTriggerRightSwipe:(CustomTableViewCell *)cell {
    NSIndexPath *indexPath = [self.tableView indexPathForCell:cell];
    NSLog(@"Right swipe triggered on row %ld", indexPath.row);
    // Execute your custom logic here
}

Quick Note: #

If you run into gesture conflicts with custom gestures, use requireGestureRecognizerToFail: to set priority (e.g., make the swipe gesture wait for any tap gestures to fail first).

内容的提问来源于stack exchange，提问作者vinoth