ios - Adjusting frame of controls programatically -

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i using uibutton control through xib file. want set frame of button programatically. have tried below

btn.frame=cgrectmake(0,0,200,70);

it doesn't change position , stays on same x , y co-ordinates have placed in xib file.

please me this.

use first 2 parameter represent x,y coordinate button , other 2 represent height , width of button

 btn.frame = cgrectmake(80.0, 210.0, 160.0, 40.0);

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