首先在 UITableViewCell.h 中声明一个代理
@protocol UITableViewCellSlideDelegate <UITableViewDelegate>
@optional
- (void)tableView:(UITableView *)tableView slideToRightWithIndexPath:(NSIndexPath *)indexPath;
- (void)tableView:(UITableView *)tableView slideToLeftWithIndexPath:(NSIndexPath *)indexPath;
@end然后在 UITableViewCell.m 中 创建一个手势 UIPanGestureRecognizer，因为我们左右滑动的时候必须依赖拖动手势，然后在 UIPanGestureRecognizer 的代理方法中进行判断到底是左滑还是右滑
static const CGFloat kSlideWidth = 80;
static const CGFloat kSlideWidthDelta = 0.08;
#pragma mark - UIGestureRecognizerDelegate
- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer
{
if (self.panGestureRecognizer == gestureRecognizer) {
CGPoint point = [self.panGestureRecognizer translationInView:self];
return fabs(point.x) > fabs(point.y);
} else {
return NO;
}
}
#pragma mark - Event Handler
- (void)panGestureRecognizerHandler:(UIPanGestureRecognizer *)gestureRecognizer
{
switch (gestureRecognizer.state) {
case UIGestureRecognizerStateChanged: {
CGPoint point = [gestureRecognizer translationInView:self];
CGFloat offset = point.x;
if (offset >= kSlideWidth) {
offset = kSlideWidth + (offset - kSlideWidth) * kSlideWidthDelta;
if (_parent.delegate && [_parent.delegate respondsToSelector:@selector(tableView:slideToRightWithIndexPath:)]) {
id<UITableViewCellSlideDelegate> delgate = (id<UITableViewCellSlideDelegate>)_parent.delegate;
[delgate tableView:_parent slideToRightWithIndexPath:_indexPath];
}
} else if (offset <= -kSlideWidth) {
offset = -kSlideWidth + (offset + kSlideWidth) * kSlideWidthDelta;
if (_parent.delegate && [_parent.delegate respondsToSelector:@selector(tableView:slideToLeftWithIndexPath:)]) {
id<UITableViewCellSlideDelegate> delgate = (id<UITableViewCellSlideDelegate>)_parent.delegate;
[delgate tableView:_parent slideToLeftWithIndexPath:_indexPath];
}
}
self.contentView.center = CGPointMake(self.center.x + offset,
self.contentView.center.y);
break;
}
default:
break;
}
}最后就可以在外部调用代理方法进行相关的操作了
#pragma mark - UITableViewCellSlideDelegate
- (void)tableView:(UITableView *)tableView slideToRightWithIndexPath:(NSIndexPath *)indexPath
{
NSLog(@"向右滑动");
}
- (void)tableView:(UITableView *)tableView slideToLeftWithIndexPath:(NSIndexPath *)indexPath
{
NSLog(@"向左滑动");
}