• 分割線滿屏

-(void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath{   
     if ([cell respondsToSelector:@selector(setSeparatorInset:)]) { 
           [cell setSeparatorInset:UIEdgeInsetsZero];   
     }      
    if ([cell respondsToSelector:@selector(setLayoutMargins:)]) {      
         [cell setLayoutMargins:UIEdgeInsetsZero];   
   }
}
-(void)viewDidLayoutSubviews{  
    if ([self.tableview respondsToSelector:@selector(setSeparatorInset:)]) {   
         [self.tableview setSeparatorInset:UIEdgeInsetsZero];  
     }   
   if ([self.tableview respondsToSelector:@selector(setLayoutMargins:)]) {     
        [self.tableview setLayoutMargins:UIEdgeInsetsZero];   
   }
}

• 隱藏某一個cell分割線

[cell setSeparatorInset:UIEdgeInsetsMake(0, 100000, 0, 0)];

• 隱藏cell多余分割線

 UIView *view = [[UIView alloc]init];    
view.backgroundColor = [UIColor colorWithRed:240/255.0f green:243/255.0f blue:245/255.0f alpha:1];    
[self.tableview setTableFooterView:view];
  self.tableview.sectionIndexBackgroundColor = [UIColor colorWithRed:240/255.0f green:243/255.0f blue:245/255.0f alpha:1];

• 隱藏cell分割線

self.tableView.separatorStyle = NO;