This post deals with adding a button in UIView by coding…

Create a button

UIButton *button1 = [UIButton buttonWithType:UIButtonTypeRoundedRect];

button1.frame = CGRectMake(x, y, width, height);

where x and y are coordinates

width is width of the button,height is height of the button

[button1 setTitle:@"Hello" forState:UIControlStateNormal];

Add the button to parent view

[[self view] addSubview:button1];