How to truncate tail in a two lines table cell programmatically on iOS

I have a a book names shown in a table view. The table view cells has 2 lines cell.textLabel.numberOfLines = 2 Now I want to t开发者_开发技巧runcate the tail of the second line. Is this possible to achieve programmatically?

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label.lineBreakMode = UILineBreakModeTailTruncation;

However, truncate tail is the default setting for UILabel objects.

For making this clear, please refer to the UILabel class reference