Swift常用全局常量、函数

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常量定义
常量可以用小写k开头,其余大写，配上下划线
Swift的常量,使用let定义常量
复杂表达式，可以用全局的func函数代替

文件/// cache文件路径let cachesPath: String = NSSearchPathForDirectoriesInDomains(.CachesDirectory, .UserDomainMask, true).last!界面尺寸/* 导航栏高度 */let kNavigationH = 64/* 工具栏高度 */let kTabBarHeight = 49/* 屏幕的宽 */public let kSCREEN_WIDTH  = UIScreen.mainScreen().bounds.size.width/* 屏幕的高 */public let kSCREEN_HEIGHT  = UIScreen.mainScreen().bounds.size.height/* 屏幕的宽 */public let kMAIN_BOUNDS: CGRect = UIScreen.mainScreen().bounds设备信息/// Swift获取唯一标识var uniqueString = NSProcessInfo.processInfo().globallyUniqueString加载Xib/**加载Xib- parameter nibName: Xib名字- returns: AnyObject*/func kloadNibNamed(nibName:String)-> AnyObject{    return NSBundle.mainBundle().loadNibNamed(nibName, owner: nil, options: nil).first!}func kRegisterNib(nibName:String)-> UINib{    return UINib(nibName: nibName, bundle: nil)}View//RGBA函数func kRGBA (r:CGFloat, g:CGFloat, b:CGFloat, a:CGFloat) -> UIColor{    return UIColor(red: r/255.0, green: g/255.0, blue: b/255.0, alpha: a)}// MARK: - ViewWfunc kViewW (v:UIView) -> CGFloat{    return v.frame.size.width}// MARK: - ViewHfunc kViewH (v:UIView) -> CGFloat{    return v.frame.size.height}// MARK: - ViewXfunc kViewX (v:UIView) -> CGFloat{    return v.frame.origin.x}// MARK: - ViewYfunc kViewY (v:UIView) -> CGFloat{    return v.frame.origin.y}// MARK: - ViewXWfunc kViewXW (v:UIView) -> CGFloat{    return v.frame.origin.x + v.frame.size.width}// MARK: - ViewYHfunc kViewYH (v:UIView) -> CGFloat{    return v.frame.origin.y + v.frame.size.height}调试相关// MARK: - 快速打印代码执行时间/* *TICK  code 代码块 *TOCK */let TICK = NSDate()let TOCK: () = print("Time:\(-TICK.timeIntervalSinceNow)")主题配置struct Theme {    /* APP导航条barButtonItem文字大小 */    static let kNavItemFont: UIFont = UIFont.systemFontOfSize(16)    /* APP导航条titleFont文字大小 */    static let kNavTitleFont: UIFont = UIFont.systemFontOfSize(18)    /* ViewController的背景颜色 */    static let kBackgroundColor: UIColor = kRGBA(255, g: 255, b: 255, a: 1)    /* webView的背景颜色 */    static let kWebViewBacagroundColor: UIColor = kRGBA(245, g: 245, b: 245, a: 1)    /* 导航栏背景颜色 */    static let kBarTintColor: UIColor = kRGBA(47, g: 46, b: 51, a: 1)}

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