ios - 夹在 willBeginEditingRowAtIndexPath 和 didEndEditingRowAtIndexPath 之间

Question

在 tableView 中，willBeginEditingRowAtIndexPath 在非常轻微的单元格滑动时被触发以进入编辑模式。当 3 个 UITableViewRowAction 按钮暴露时，手势向左拉的时间不够长，无法让单元格留在左侧。相反，单元格会滑回右侧。但是，didEndEditingRowAtIndexPath 不会自动触发。只有随后的触摸手势才会触发该方法。为什么单元格向右滑回时didEndEditingRowAtIndexPath不触发？当手势结束和/或单元格返回到与右侧对齐的正常状态时，我该如何拾取？

或者换句话说。 willBeginEditingRowAtIndexPath 被触发并将我的屏幕状态更改为编辑状态。但是，由于一直没有进入编辑阶段，我需要将屏幕状态改回非编辑状态。 didEndEditingRowAtIndexPath 会这样做，但直到再次触摸时才会调用它，这会让用户感到困惑。是否有另一个指示器，也许在 UIControl 中可以触发我可以使用？

更多信息:UITableViewRowAction 按钮是基于以下 repo 的子类:https://github.com/benguild/BGTableViewRowActionWithImage .虽然使用标准 UITableViewRowAction 进行测试并没有解决问题。

Answer 1

虽然这是一个 iOS 错误，但我找到了解决方法。

在您的单元格中，添加以下代码:

@interface UITableViewCell () <UIGestureRecognizerDelegate>
    @property (nonatomic, strong) UIPanGestureRecognizer *panRecognizer;
    @property (nonatomic, assign) BOOL isShowingDeleteConfirmationMask;
@end

-(void)awakeFromNib
{
    [super awakeFromNib];

    self.panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panGestureRecongizer:)];
    self.panRecognizer.delegate = self;
    [self.contentView addGestureRecognizer:self.panRecognizer];
}

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
    return YES;
}

- (void)panGestureRecongizer:(UIPanGestureRecognizer *)recognizer
{
    switch (recognizer.state) {
        case UIGestureRecognizerStateEnded:
            [self refreshCellState];
            break;
        case UIGestureRecognizerStateCancelled:
            [self refreshCellState];
            break;
        default:
            break;
    }
}

- (void)didTransitionToState:(UITableViewCellStateMask)state
{
    [super willTransitionToState:state];

    if (state == UITableViewCellStateDefaultMask) {
        self.isShowingDeleteConfirmationMask = NO;
    } else if (state == UITableViewCellStateShowingDeleteConfirmationMask)  {
        self.isShowingDeleteConfirmationMask = YES;
    }
}

- (void)refreshCellState
{
     double delayInSeconds = 1.0; // one second should be enough for animationt to complete
     dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delayInSeconds * NSEC_PER_SEC));
     dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
         BOOL deleteViewExists = NO;
         for (UIView *subview in self.subviews) {
             // There is a iOS bug where swiping left on cell to show delete button would not trigger default state
             // if you don't swipe pass delete button
             if ([NSStringFromClass([subview class]) isEqualToString:@"UITableViewCellDeleteConfirmationView"]) {
                 deleteViewExists = YES;
                 break;
             }
         }
         if (!deleteViewExists && [self isEditing] && self.isShowingDeleteConfirmationMask) {
             if ([self.delegate respondsToSelector:@selector(cellDidEndEditing:)]) {
                 [self.delegate cellDidEndEditing:self];
             }
         }
     });
 }

在你的 View Controller 中，

- (void)cellDidEndEditing:(nonnull LPToteItemTableViewCell *)cell
{
    [self.tableView setEditing:NO];
}