ios - Why can't I use variableHeightRows in three20? -

in tttableviewcontroller subclass, i'm setting variableheightrows = yes. in tttableviewcell subclass, i've implemented

+ (cgfloat)tableview:(uitableview*)tableview rowheightforobject:(id)object

the cell height not varying @ all, , three20 doesn't appear calling rowheightforobject method - set breakpoint inside , during debugging never hit breakpoint. doing wrong? there else need set?

i've never encountered problems variableheightrows, throw out random things try:

• are sure line executing variableheightrows = yes being called? have set breakpoint there?
• are sure subclass 1 populating table (you've set in data source). maybe try setting breakpoint somewhere else in subclass.