//加入如下代码-(void)tableView:(UITableView*)tableViewwillDisplayCell:(UITableViewCell*)cellforRowAtIndexPath:(NSIndexPath*)indexPath{if([tableViewrespondsToSelector:@selector(setSeparatorInset:)]){[tableViewsetSeparatorInset:UIEdgeInsetsZero];}if([tableViewrespondsToSelector:@selector(setLayoutMargins:)]){[tableViewsetLayoutMargins:UIEdgeInsetsZero];}if([cellrespondsToSelector:@selector(setLayoutMargins:)]){[cellsetLayoutMargins:UIEdgeInsetsZero];}}

iOS 7

@property(nonatomic)UIEdgeInsetsseparatorInsetNS_AVAILABLE_IOS(7_0)UI_APPEARANCE_SELECTOR;//allowscustomizationoftheframeofcellseparators

iOS 8

@property(nonatomic)UIEdgeInsetslayoutMarginsDescriptionThedefaultspacingtousewhenlayingoutcontentintheview.AvailabilityiOS(8.0andlater)DeclaredInUIView.hReferenceUIViewClassReference