可访问性看不到SWTableViewCell的实用程序按钮

Question

我使用的是SWTableviewCell，我可以向左滑动，显示带有XCTest和可访问性的实用程序按钮，但找不到这些元素。与无障碍检查人员进行了双重检查。

由于SWTableViewCell中的实用程序按钮是常规的UIButtons，所以它应该是开箱即用的。还尝试设置按钮的辅助功能标签。

任何帮助都将不胜感激。谢谢!

更新:这是我的代码：

    // This works
    app = XCUIApplication()
    let firstCell = app.tables.cells.elementBoundByIndex(0)
    firstCell.swipeLeft()

    // Following 2 TODO's doesn't work
    // TODO: tap More button
    firstCell.buttons["More"].tap()
    XCTAssertEqual(app.sheets.count, 1, "'More' action sheet should be present")
    // TODO: assert sheet doesn't contain Lock/Unlock button
    let sheet = app.sheets.element
    let lockButton = sheet.buttons["Lock"]
    sheet.buttons["Cancel"].tap()

Answer 1

最后重写我的UIAccessibilityContainer子类的UITableViewCell方法，如下所示：

- (NSArray *)accessibilityElements {
    if (_accessibilityElements == nil) {
        _accessibilityElements = [[NSMutableArray alloc] initWithCapacity: 2];
        [_accessibilityElements addObject: self.miscLabel];
        [_accessibilityElements addObject: self.titleLabel];
    }
    return _accessibilityElements;
}   

- (nullable id)accessibilityElementAtIndex:(NSInteger)index {
    return _accessibilityElements[index];
}   

- (NSInteger)indexOfAccessibilityElement:(id)element {
    return [_accessibilityElements indexOfObject: element];
}

注_accessibilityElements是我的单元格的实例变量：

@interface MyCell : SWTableViewCell
@property (weak, nonatomic) IBOutlet UILabel *titleLabel;
@property (weak, nonatomic) IBOutlet UILabel *miscLabel;
...
@property (strong, nonatomic) NSMutableArray *accessibilityElements;

@end

然后，实现SWTableViewCellDelegate方法来向可访问性添加和删除实用程序按钮：

- (void)swipeableTableViewCellDidEndScrolling:(MyCell *)cell {
    NSMutableArray *utilityButtons = cell.accessibilityElements;
    if (cell.isUtilityButtonsHidden) {
        [utilityButtons removeObjectsInArray: cell.rightUtilityButtons];
    }
    else {
        [utilityButtons addObjectsFromArray: cell.rightUtilityButtons];
    }
}

Answer 2

在SWTableViewCell.h中，在文件末尾添加以下代码行。

// Accessibility
@property (strong, nonatomic) NSMutableArray *accessibilityElements;
- (void)addElementForAccesiblilty:(id)element;
- (void)removeElementFromAccesiblilty:(id)element;

以及SWTableViewCell.m中的以下行

#pragma mark Accessibilty

- (void)addElementForAccesiblilty:(id)element
{
    if (![self.accessibilityElements containsObject:element]) {
        [self.accessibilityElements addObject:element];
    }
}

- (void)removeElementFromAccesiblilty:(id)element
{
    [self.accessibilityElements removeObject:element];
}

- (NSArray *)accessibilityElements {
    if (!_accessibilityElements) {
        _accessibilityElements = [[NSMutableArray alloc] initWithCapacity: 0];
        [self updateAccessibilityElementsForView:self];
    }
    return _accessibilityElements;
}

- (void)updateAccessibilityElementsForView:(UIView*)v
{
    for (UIView *subView in v.subviews)
    {
        if ([subView isKindOfClass:[UILabel class]] || [subView isKindOfClass:[UIButton class]]) {
            [_accessibilityElements addObject:subView];
        }
        [self updateAccessibilityElementsForView:subView];
    }
}

- (nullable id)accessibilityElementAtIndex:(NSInteger)index {
    id element = nil;
    @synchronized(_accessibilityElements) {
        element = _accessibilityElements[index];
    }
    return element;
}

- (NSInteger)indexOfAccessibilityElement:(id)element {
    NSInteger index = NSNotFound;
    @synchronized(_accessibilityElements) {
        index = [_accessibilityElements indexOfObject: element];
    }
    return index;
}


- (void)updateAccessibleElementsForUtilityButtons {
    switch (self.cellState) {
        case kCellStateLeft:
        {
            if (self.isUtilityButtonsHidden) {
                [self.accessibilityElements removeObjectsInArray: self.leftUtilityButtons];
            }
            else {
                [self.accessibilityElements addObjectsFromArray: self.leftUtilityButtons];
            }
            break;
        }
        case kCellStateRight:
        {
            if (self.isUtilityButtonsHidden) {
                [self.accessibilityElements removeObjectsInArray: self.rightUtilityButtons];
            }
            else {
                [self.accessibilityElements addObjectsFromArray: self.rightUtilityButtons];
            }
            break;
        }
        default: {
            [self.accessibilityElements removeObjectsInArray: self.rightUtilityButtons];
            [self.accessibilityElements removeObjectsInArray: self.leftUtilityButtons];
            break;
        }
    }
}

在scrollViewDidEndScrollingAnimation和scrollViewDidEndDecelerating委托方法中调用方法scrollViewDidEndDecelerating如下所示

- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
    [self updateCellState];
    [self updateAccessibleElementsForUtilityButtons];
    if (self.delegate && [self.delegate respondsToSelector:@selector(swipeableTableViewCellDidEndScrolling:)]) {
        [self.delegate swipeableTableViewCellDidEndScrolling:self];
    }
}

- (void)scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView
{
    [self updateCellState];
    [self updateAccessibleElementsForUtilityButtons];
    if (self.delegate && [self.delegate respondsToSelector:@selector(swipeableTableViewCellDidEndScrolling:)]) {
        [self.delegate swipeableTableViewCellDidEndScrolling:self];
    }
}

这将添加所有按钮和标签作为单元格中的可访问元素。但是，如果要添加/删除任何元素用户，请使用以下方法

- (void)addElementForAccesiblilty:(id)element;
- (void)removeElementFromAccesiblilty:(id)element;