tableView.separatorStyle = UITableViewCellSeparatorStyleNone;

// 自绘分割线
- (void)drawRect:(CGRect)rect
{
 CGContextRef context = UIGraphicsGetCurrentContext();

 CGContextSetFillColorWithColor(context, [UIColor whiteColor].CGColor);
 CGContextFillRect(context, rect);

 CGContextSetStrokeColorWithColor(context, [UIColor colorWithRed:0xE2/255.0f green:0xE2/255.0f blue:0xE2/255.0f alpha:1].CGColor);
 CGContextStrokeRect(context, CGRectMake(0, rect.size.height - 1, rect.size.width, 1));
}

- (void)setFrame:(CGRect)frame
{
 frame.size.height -= 1;
 // 给cellframe赋值
 [super setFrame:frame];
}

// 取消系统分割线
self.tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
// 设置tableView背景色
self.tableView.backgroundColor = [UIColor colorWithWhite:215 / 255.0 alpha:1];

-(void)viewDidLoad {
 [super viewDidLoad];
 //1.调整(iOS7以上)表格分隔线边距
 if ([self.tableView respondsToSelector:@selector(setSeparatorInset:)]) {
 self.tableView.separatorInset = UIEdgeInsetsZero;
 }
 //2.调整(iOS8以上)view边距(或者在cell中设置preservesSuperviewLayoutMargins,二者等效)
 if ([self.tableView respondsToSelector:@selector(setLayoutMargins:)]) {
 self.tableView.layoutMargins = UIEdgeInsetsZero;
 }
}

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
 static NSString *ID = @"cell";
 FSDiscoverSpecialCell *cell = [tableView dequeueReusableCellWithIdentifier:ID];
 if (cell == nil) {
 cell = [[FSDiscoverSpecialCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:ID];
 }

 //2.调整(iOS8以上)tableView边距(与上面第2步等效,二选一即可)
 if ([cell respondsToSelector:@selector(setPreservesSuperviewLayoutMargins:)]) {
 cell.preservesSuperviewLayoutMargins = NO;
 }
 //3.调整(iOS8以上)view边距
 if ([cell respondsToSelector:@selector(setLayoutMargins:)]) {
 [cell setLayoutMargins:UIEdgeInsetsZero];
 }
 return cell;
}

-(void)viewDidLoad {
 [super viewDidLoad];
 if ([self.tableView respondsToSelector:@selector(setSeparatorInset:)]) {
 [self.tableView setSeparatorInset:UIEdgeInsetsZero];
 }
 if ([self.tableView respondsToSelector:@selector(setLayoutMargins:)]) {
 [self.tableView setLayoutMargins:UIEdgeInsetsZero];
}

- (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];
 }
}

@property (nonatomic) UIEdgeInsets separatorInset NS_AVAILABLE_IOS(7_0) UI_APPEARANCE_SELECTOR; 
// allows customization of the frame of cell separators

@property (nonatomic) UIEdgeInsets layoutMargins NS_AVAILABLE_IOS(8_0);

if ([_tableView respondsToSelector:@selector(setSeparatorInset:)]) { 
    [_tableView setSeparatorInset:UIEdgeInsetsMake(0,0,0,0)]; 
  } 
   
  if ([_tableView respondsToSelector:@selector(setLayoutMargins:)]) { 
    [_tableView setLayoutMargins:UIEdgeInsetsMake(0,0,0,0)]; 
  } 

//代理方法 
-(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]; 
  } 
}