How to customize UITableViewCell for string length

I have to fit strings within a table. The strings are of different lengths. The cell of the table should be sized accord开发者_JAVA百科ing to string length.

I am using sizeWithFont:constrainedToSize: . But I could not use it properly. Can any one please suggest a solution?

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Use the delegate method tableView:heightForRowAtIndexPath: to change the table view row heights.