在3楼看到答案后，我试图弄清楚设置TableView和TableViewCell之间的分隔符是什么关系，并做了一些测试。以下是我的结论:

we can consider that setting the cell's separator to zero has to move the separator in two steps: first step is to set cell's separatorinset to zero. second step is to set cell's marginlayout to zero. set the TableView's separatorinset and marginlayout can affect the Cell's separatorinset. However, from the test, I find that the TableView's separatorinset seem to be useless, TableView's marginlayout can actually affect cell's marginlayout. set Cell's PreservesSuperviewLayoutMargins = false, can cut off TableView's marginlayout effect on Cells. one of the solutions: func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell { var cell = UITableViewCell() cell.preservesSuperviewLayoutMargins = false cell.separatorInset = UIEdgeInsetsZero cell.layoutMargins = UIEdgeInsetsZero return cell }

这里有一个简单的方法全局删除嵌入。

在UITableViewCell +移到swift:

import UIKit

extension UITableViewCell {

  override public var layoutMargins: UIEdgeInsets {
    get { return UIEdgeInsetsZero }
    set { }
  }

}

在AppDelegate应用中:didFinishLaunchingWithOptions

  UITableViewCell.appearance().separatorInset = UIEdgeInsetsZero

你可能会想a)也只是覆盖separatorInset在扩展，或b)设置外观代理的layoutmargin，而不是。这两种方法都行不通。即使separatorInset被指示为属性，尝试将其作为属性(或方法)重写也会产生编译器错误。并且为UITableViewCell的layoutmargin设置外观代理(或者，也为UITableView的layoutmargin和separatorInset设置外观代理)没有效果。

在盲目地试图解决问题之前，让我们花点时间来了解一下这个问题。

在调试器中快速浏览会告诉你分隔行是UITableViewCell的子视图。似乎单元格本身对这些线条的布局负有相当大的责任。

iOS 8引入了布局边距的概念。默认情况下，视图的布局边距为8pt，它们继承自祖先视图。

正如我们所能告诉的，当布局它的分隔线时，UITableViewCell选择尊重左边的布局边距，使用它来约束左边的插图。

把所有这些放在一起，为了实现真正为零的理想插入，我们需要:

将左侧布局边距设置为0 停止任何继承的边缘覆盖它

这样说来，这是一个相当简单的任务:

cell.layoutMargins = UIEdgeInsetsZero;
cell.preservesSuperviewLayoutMargins = NO;

注意事项:

This code only needs to be run once per cell (you're just configuring the cell's properties after all), and there's nothing special about when you choose to execute it. Do what seems cleanest to you. Sadly neither property is available to configure in Interface Builder, but you can specify a user-defined runtime attribute for preservesSuperviewLayoutMargins if desired. Clearly, if your app targets earlier OS releases too, you'll need to avoid executing the above code until running on iOS 8 and above. Rather than setting preservesSuperviewLayoutMargins, you can configure ancestor views (such as the table) to have 0 left margin too, but this seems inherently more error-prone as you don't control that entire hierarchy. It would probably be slightly cleaner to set only the left margin to 0 and leave the others be. If you want to have a 0 inset on the "extra" separators that UITableView draws at the bottom of plain style tables, I'm guessing that will require specifying the same settings at the table level too (haven't tried this one!)

对我来说，简单的线条就够了

cell.layoutMargins = UIEdgeInsetsZero

至于cdstamper建议的表格视图，在单元格的layoutSubview方法中添加以下行对我来说是可行的。

- (void)layoutSubviews 
{
    [super layoutSubviews];

    if ([self respondsToSelector:@selector(setSeparatorInset:)])
                [self setSeparatorInset:UIEdgeInsetsZero];

        if ([self respondsToSelector:@selector(setPreservesSuperviewLayoutMargins:)])
        {
            [self setPreservesSuperviewLayoutMargins:NO];;
        }

        if ([self respondsToSelector:@selector(setLayoutMargins:)]) 
        {
            [self setLayoutMargins:UIEdgeInsetsZero];
        }
}

我是这样做的:

tableView.separatorInset = UIEdgeInsetsZero;
tableView.layoutMargins = UIEdgeInsetsZero;
cell.layoutMargins = UIEdgeInsetsZero;