ios - Change a UIButton's text (padding) programmatically in Swift -

still learning swift , don't know objective-c. saw in order changing button's text programmatically requires use of titleedgeinsets not sure how use it.

i change text in button (padding) in bottom , both left , right.

thanks responses and/or examples!

ios 9.1/xcode 7.1/swift 2.1/osx 10.10.5:

the method titleedgeinsets didn't work me. button's frame tightly hugs text (i didn't specify frame size), , frame has red background color. after doing:

 mybutton.titleedgeinsets = uiedgeinsetsmake(10,10,10,10) 

the red background shrunk inwards 10 pixels on each side, meant of text outside red background. using negative values had no effect on original frame size.

i able padding around text, making frame bigger, doing:

mybutton.contentedgeinsets = uiedgeinsetsmake(5,5,5,5)