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| //通过frame来初始化UIButton
let button = UIButton(frame: CGRect(x: 0, y: 300, width: 320, height: 60))
//通过UIButtonType来初始化UIButton
/*
enum UIButtonType : Int {
case Custom 自定义风格
case System 系统风格
case DetailDisclosure 蓝色小箭头按钮，主要做详细说明用
case InfoLight 亮色感叹号
case InfoDark 暗色感叹号
case ContactAdd 十字加号按钮
}
*/
var button2 = UIButton(type: UIButtonType.custom)
//设置背景色，方便看到效果
button.backgroundColor = UIColor.orange
//添加到视图上
self.view.addSubview(button)
//---------------常用属性和方法
//修改背景色
button.backgroundColor = UIColor.orange
//获取标题标签控件
var aLabel = button.titleLabel
//设置标题，需要注意，这里需要指定设置UIButton的哪个状态的title
/*
struct UIControlState : RawOptionSetType {
init(_ value: UInt)
static var Normal: UIControlState { get }
static var Highlighted: UIControlState { get } // used when UIControl isHighlighted is set
static var Disabled: UIControlState { get }
static var Selected: UIControlState { get } // flag usable by app (see below)
static var Application: UIControlState { get } // additional flags available for application use
static var Reserved: UIControlState { get } // flags reserved for internal framework use
}
*/
button.setTitle("", for: UIControlState())
//设置标题颜色
button.setTitleColor(UIColor.red, for: UIControlState())//正常状态标题颜色
button.setTitleColor(UIColor.black, for: .highlighted)//鼠标按下标题颜色
//设置标题阴影颜色
button.setTitleShadowColor(UIColor.black, for: UIControlState())
//设置图片，图片会遮挡butoon的标题
// button.setImage(UIImage(named: "testImage"), forState: .Normal)
//设置背景图片
// button.setBackgroundImage(UIImage(named: "testImage"), forState: .Normal)
//设置富文本
let buttonAttribute:NSMutableAttributedString=NSMutableAttributedString(string: "swift大法好!")
//文本0开始5个字符字体HelveticaNeue-Bold，16号
buttonAttribute.addAttribute(NSFontAttributeName, value: UIFont(name: "HelveticaNeue-Bold", size: 20)!, range: NSMakeRange(0, 4))
//设置字体颜色
buttonAttribute.addAttribute(NSForegroundColorAttributeName, value: UIColor.red, range: NSMakeRange(4, 2))
//设置文字背景颜色
buttonAttribute.addAttribute(NSBackgroundColorAttributeName, value: UIColor.green, range: NSMakeRange(0, 6))
button.setAttributedTitle(buttonAttribute, for: UIControlState())
//默认情况下，钮高亮的情况下图像的颜色会被画的深一些，如果下面的这个属性设置为false，那么可以去掉这个功能
button.adjustsImageWhenHighlighted = false
//默认情况下，当按钮禁用的时候，图像会被画得深一点，设置NO可以取消设置
button.adjustsImageWhenDisabled = false
//下面这个属性设置为yes的状态下，按钮按下会发光
button.showsTouchWhenHighlighted = true
//获取富文本
var attributedTitle = button.attributedTitle(for: UIControlState())
//获取标题
var titleOfState = button.title(for: UIControlState())
//获取标题颜色
var titleColorOfState = button.titleColor(for: UIControlState())
//获取标题阴影颜色
var titleShadowColorOfState = button.titleShadowColor(for: UIControlState())
//获取图片
var imageOfState = button.image(for: UIControlState())
//事件
button.addTarget(self, action: #selector(ViewController.buttonUpInsideFunc), for: .touchUpInside)
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