iphone - 无法在 tableviewcell ios 7 上显示删除按钮

Question

我使用 UITableviewcellEditingstyleDelete 显示按钮，让用户点击它显示删除按钮(这与您在电子邮件应用程序中看到的方式相同，当用户点击编辑然后点击按钮显示删除按钮)。它在 ios6 中工作正常，但是当我在具有 ios 7 的设备上构建我的应用程序时，删除按钮消失了，但是当您点击删除按钮区域时，它也可以删除。问题是用户看不到删除按钮(操作系统提供的红色按钮)。我的代码是:

- (UITableViewCellEditingStyle)tableView:(UITableView *)aTableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath
{
    // Detemine if it's in editing mode
    if (self.editing)
    {
       return UITableViewCellEditingStyleDelete;
    }

   return UITableViewCellEditingStyleNone;
}

请帮助我找到解决方案，我对 iOS7 环境不太了解。谢谢!

Answer 1

谢谢大家的建议，这个方案可以解决，我做成custom cell

 UIImageView* backgroundImage;

//Variable for animation delete button
// Keep the ContactView in normal state
BOOL bFirstEditingCell;
BOOL bShownRedMinus;
BOOL bShownDeleteButton;
CGRect frameOfContactViewInNormal;
CGPoint centerOfCellInNormal;
UITableViewCellAccessoryType accessoryTypeInNormal;

//

 - (id)initWithCoder:(NSCoder *)decoder
{
    if (self = [super initWithCoder:decoder])
    {
        super.backgroundColor = [UIColor clearColor];
        self.selectionStyle = UITableViewCellSelectionStyleNone;
        backgroundImage = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"row_gradient" ]];
        self.backgroundView = backgroundImage;
        bShownDeleteButton = false;
        bShownRedMinus = false;
        bFirstEditingCell = true;
        accessoryTypeInNormal = UITableViewCellAccessoryNone;
    }
    return self;
}


- (void)willTransitionToState:(UITableViewCellStateMask)state {
[super willTransitionToState:state];
if (!isOS7()) {
    return;
}

for (UIView *subview in self.subviews) {
    //Keep normal value of contact view and cell
    if (bFirstEditingCell   ) {
        frameOfContactViewInNormal = self->contactView.frame;
        frameOfContactViewInNormal.size.width = kContactViewWidth;
        centerOfCellInNormal = subview.center;
        bFirstEditingCell = false;
    }

    if (state == UITableViewCellStateDefaultMask) {
        self.backgroundView = backgroundImage;
        subview.center = centerOfCellInNormal;
        //Set for position of speed dial image
        CGRect f = frameOfContactViewInNormal;
        if (bShownRedMinus) {
            f.size.width -= kRedMinusButtonWidth;
        }
        self->contactView.frame = f;
        bShownDeleteButton = false;
        self.accessoryType = accessoryTypeInNormal;
    }
    else if (state == UITableViewCellStateShowingDeleteConfirmationMask)
    {
        float sectionIndexWidth = 0.0;

        if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
            sectionIndexWidth = 30.0;
        }
        else {
            sectionIndexWidth = 15.0;
        }
        CGPoint center = centerOfCellInNormal;
        subview.center = CGPointMake(center.x - sectionIndexWidth, center.y);
        self.backgroundView = nil;

        //Set width of contact name
        UIView* view = [subview.subviews objectAtIndex: 0];
        CGRect f = view.frame;
        f.origin.x = (kDeleteButtonWidth + sectionIndexWidth);
        view.frame = f;
        f = frameOfContactViewInNormal;
        f.size.width = self.frame.size.width - (kDeleteButtonWidth + sectionIndexWidth);
        self->contactView.frame = f;
        bShownDeleteButton = true;
        bShownRedMinus = false;
        accessoryTypeInNormal = self.accessoryType;
        self.accessoryType = UITableViewCellAccessoryNone;
    }
    else if (state == UITableViewCellStateShowingEditControlMask) {
        CGRect f = frameOfContactViewInNormal;
        f.size.width -= 5;
        self->contactView.frame = f;
        bShownRedMinus = true;
    }
    else if (state == 3) { //State for clicking red minus button
        CGRect f = frameOfContactViewInNormal;
        f.size.width += kRedMinusButtonWidth;
        self->contactView.frame = f;

        self.backgroundView = nil;
    }
}
}