[bottomButton setTitleEdgeInsets:UIEdgeInsetsMake(10, -190, 10, 44)]; //上左下右
||
button.contentVerticalAlignment = UIControlContentVerticalAlignmentBottom;
button. contentHorizontalAlignment =UIControlContentHorizontalAlignmentLeft;
原文：http://www.cnblogs.com/Bo-tree/p/5161322.html