iphone - how to place previously selected value at UIPickerview bar -

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i displaying array objects in pickerview.

my array contains {one,two,three,four,five}

when select value in picker view, getting value using
- (void)pickerview:(uipickerview *)thepickerview didselectrow:(nsinteger)row incomponent:(nsinteger)component {

if select two, exit picker view , next time display 1 in picker view bar.

but need display selected value.

i think understandable otherwise let me add comment.

- (void) viewdidappear:(bool)animated  { [pickerview selectrow:selecteditem incomponent:0 animated:yes];  }

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