ios - Show a label in random places on the screen -


i'm trying make label appear in random areas of screen @ random sizes when button pressed.

any guidance appreciated.

here's have far:

@ibaction func button(sender: anyobject) {          //random x , y value         var xvalue = cgfloat(arc4random() % 50)         var yvalue = cgfloat(arc4random() % 20)          //random sizes         var xsize = cgfloat(arc4random_uniform(150) + 60)         var ysize = cgfloat(arc4random_uniform(150) + 60)         label.text = faces.randomface()         label.frame = cgrectmake(xvalue, yvalue, xsize, ysize) }

you using autolayout. autolayout can't change view's frame , have work. constraints override changes make , nothing happens.

instead, this:

create horizontal position constraint (based on leading edge) , vertical position constraint (based on top layout guide.)

create height , width constraints.

control-drag 4 constraints top of view controller's code create outlets constraints.

then apply changes constant property of constraints , call layoutifneeded on button's superview (or on view controller's content view - should work too.)


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