let alert = UIAlertController(title: "温馨提示", message: "1.哈哈哈哈哈哈哈哈哈哈或或。\n2.哈哈哈哈哈啊哈哈啊。", preferredStyle: .alert)
let subView1 : UIView = alert.view.subviews[0]
let subView2 : UIView = subView1.subviews[0]
let subView3 : UIView = subView2.subviews[0]
let subView4 : UIView = subView3.subviews[0]
let subView5 : UIView = subView4.subviews[0]
// let title = subView5.subviews[0] as! UILabel
let message = subView5.subviews[1] as! UILabel
message.textAlignment = .left
alert.addAction(UIAlertAction(title: "确定", style: UIAlertActionStyle.default) { (_) in
})
present(VC, animated: true, completion: nil)
参考文章：http://www.jianshu.com/p/b84e1bc81666
