A subclass of UITableViewCell which slides to the left when the 'swipe to delete' gesture happens

SlidesToLeftOnDeleteTableViewCell.m

#import "SlidesToLeftOnDeleteTableViewCell.h"

@interface SlidesToLeftOnDeleteTableViewCell ()
@property(nonatomic, assign) CGFloat deleteConfirmationShift;
@end

@implementation SlidesToLeftOnDeleteTableViewCell

- (void)prepareForReuse {
    [super prepareForReuse];
    self.deleteConfirmationShift = 0;
}

- (void)layoutSubviews {
    CGFloat textLabelWidth = self.textLabel.frame.size.width;

    [super layoutSubviews];

    if (!self.showingDeleteConfirmation && self.deleteConfirmationShift > 0) {
        // move the [Delete] button back to where it should be,
        // so it doesn't whizz off the right hand side of the screen
        for (UIView *subview in self.subviews) {
            if ([NSStringFromClass([subview class]) isEqualToString:@"UITableViewCellDeleteConfirmationControl"]) {
                CGRect newFrame = subview.frame;
                newFrame.origin.x -= self.deleteConfirmationShift;
                subview.frame = newFrame;
            }
        }

        // move self.frame back, and reduce its width again
        CGRect newFrame = self.frame;
        newFrame.origin.x += self.deleteConfirmationShift;
        newFrame.size.width -= self.deleteConfirmationShift;

        // NOTE: important to set this to zero....
        self.deleteConfirmationShift = 0;

        // ... before setting "self.frame", because "self.frame = ..."
        // causes a synchronous call to [self layoutSubviews] !!
        self.frame = newFrame;
    }

    // if shift is positive, then the delete button is appearing
    CGFloat shift = textLabelWidth - self.textLabel.frame.size.width;
    if (self.showingDeleteConfirmation && shift != 0) {
        self.deleteConfirmationShift = shift;

        for (UIView *subview in self.contentView.subviews) {
            CGRect newFrame = subview.frame;

            // compensate for the [super layoutSubViews] changing the width
            newFrame.size.width += self.deleteConfirmationShift;
            subview.frame = newFrame;
        }

        {
            CGRect newFrame = self.frame;
            newFrame.origin.x -= self.deleteConfirmationShift;
            newFrame.size.width += self.deleteConfirmationShift;
            self.frame = newFrame;
        }
    }
}

@end

MIT license, if anyone's interested.