iPhone Leak on UITextfield text

Instruments tools says this is a leak but I can't figure out why, a开发者_JS百科ny ideas?

Make sure you are releasing self.variables property in your dealloc (or somewhere). Also, ensure that your Variable class is releasing variableValues property in the Variable class's dealloc.

That's not a proper way to assign @"" to a NSMutableString. You should use setString: instead.