Xcode 7 iOS 9 UITableViewCell Separator Inset issue

Question

This is not a question, rather a solution to the problem I faced.

In Xcode 7, when the application is run on iOS 9 on iPad devices, the UITableViewCell

Answer 1

Up to iOS 9

In viewDidLoad

Objective-C

- (void)viewDidLoad {
    [super viewDidLoad];
    //Required for iOS 9
    if ([[[UIDevice currentDevice]systemVersion]floatValue] >= 9.0) {
        self.testTableView.cellLayoutMarginsFollowReadableWidth = NO;
    }
}

Swift

override func viewDidLoad() {
    super.viewDidLoad()
    if #available(iOS 9.0, *) {
        tableViewDiet.cellLayoutMarginsFollowReadableWidth = false
    }
}

In TableViewDelegate methods add following code:

Objective-C

- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath {

    // Remove seperator inset
    if ([cell respondsToSelector:@selector(setSeparatorInset:)]) {
        [cell setSeparatorInset:UIEdgeInsetsZero];
    }

    // Prevent the cell from inheriting the Table View's margin settings
    if ([cell respondsToSelector:@selector(setPreservesSuperviewLayoutMargins:)]) {
        [cell setPreservesSuperviewLayoutMargins:NO];
    }

    // Explictly set your cell's layout margins
    if ([cell respondsToSelector:@selector(setLayoutMargins:)]) {
        [cell setLayoutMargins:UIEdgeInsetsZero];
    }
}

Swift

func tableView(tableView: UITableView, willDisplayCell cell: UITableViewCell, forRowAtIndexPath indexPath: NSIndexPath) {

    // Remove seperator inset
    if cell.respondsToSelector(Selector("setSeparatorInset:")) {
        cell.separatorInset = UIEdgeInsetsZero
    }

    // Prevent the cell from inheriting the Table View's margin settings
    if cell.respondsToSelector(Selector("setPreservesSuperviewLayoutMargins:")) {
        cell.preservesSuperviewLayoutMargins = false
    }

    // Explictly set your cell's layout margins
    if cell.respondsToSelector(Selector("setLayoutMargins:")) {
        cell.layoutMargins = UIEdgeInsetsZero
    }
}

Answer 2

iOS 9 and above:

This is because of a new feature called readable content guides. It provides margins that are suitable for reading. So, on iPhone and portrait iPad they are very small margins. But in the landscape, iPad they are bigger. In iOS 9, UITableViewCell margins default to following the readable content guide.

If you want to stop that, just set the tableView's cellLayoutMarginsFollowReadableWidth to NO/false.

Source: https://forums.developer.apple.com/thread/5496

Answer 3

readableContentGuide is a layout guide that is already added to every UIView.

This is to ensure the user doesn't have to turn his head to read the content.

If you want to follow the readable content guide, then do the following:

let baseSection = UIView()

contentView.addSubview(baseSection)

baseSection.translatesAutoresizingMaskIntoConstraints = false

let insets = UIEdgeInsets(top: 4, left: 0, bottom: 4, right: 0)

baseSection.leadingAnchor.constraint(equalTo: readableContentGuide.leadingAnchor, constant: insets.left).isActive = true
baseSection.trailingAnchor.constraint(equalTo: readableContentGuide.trailingAnchor, constant: -insets.right).isActive = true
baseSection.topAnchor.constraint(equalTo: contentView.topAnchor, constant: insets.top).isActive = true
baseSection.bottomAnchor.constraint(equalTo: contentView.bottomAnchor, constant: -insets.bottom).isActive = true

Note: In the code above the bottom and top anchors use the contentView instead of the readableContentGuide so that the content vertical margins change based on the tableView.rowHeight.

Answer 4

I hope this is helpful.

if #available(iOS 9.0, *) {
      myTableView.cellLayoutMarginsFollowReadableWidth = false
}