iphone - Enabling scrolling in textview based on number of lines -

i want enable scrolling in textview if number of lines exceeds 5 otherwise there should not scrolling. possible , how achieve that?

uitextview inherits uiscrollview has property called scrollenabled

you can add register class uitextviewdelegate , implement method

- (void)textviewdidchange:(uitextview *)textview

then textview object text property, , check see how many newlines/carriage returns there are. if there more 5, set scrollenabled yes

update:

take @ nsstring uikit additions, there methods in class allow cgsize of nsstring, sizewithfont:constrainedtosize:linebreakmode:

using should able enable scrolling once cgsize reaches height equivalent or greater 5 lines of text calculated uifont.lineheight*5