objective c - Change UIPicker's row color or row text color -

i have uipicker i'm using toggle layers on , off. want able either change color of row within picker indicate if layer on, or change font color of text indicate if layer on.

if neither possible, append nsstring add x @ end of before return (so "streets" become "streets x" if layer on). i'm not sure how either. know can type of buffing number, not sure nsstring. know picker can display 27 characters, maybe set string length 26 , set char @ location 26 x? don't know how set length of string.

any ideas either path?

for custom rows in uipickerview have implement pickerview:viewforrow:forcomponent:reusingview: instead of pickerview:titleforrow:forcomponent:.

in case you'd use uilabel view, , change text colour , text string each row.

assuming have 1 component:

- (uiview *)pickerview:(uipickerview *)pickerview viewforrow:(nsinteger)row forcomponent:(nsinteger)component reusingview:(uiview *)view {     uilabel *label;     if (!view) // no view re-use, create new 1         label = [[uilabel alloc] initwithframe://your frame here];     else         label = (uilabel*)view;      label.text = // row text here     if (//some flag indicate row selected)         label.textcolor = [uicolor redcolor];     else         label.textcolor = [uicolor blackcolor];      return label;  }