@H_404_2@在OC里面我们经常遇到一些枚举值可以多选的，需要用或运算来把这些枚举值链接起来，这样的我们称为位移枚举，但是在swift里面却不能这么做，下面来讲解一下如何在swift里面使用

OC的位移枚举的区分

//位移枚举
typedef NS_OPTIONS(NSUInteger,UIViewAutoresizing) {
    UIViewAutoresizingNone                 = 0,UIViewAutoresizingFlexibleLeftMargin   = 1 << 0,UIViewAutoresizingFlexibleWidth        = 1 << 1,UIViewAutoresizingFlexibleRightMargin  = 1 << 2,UIViewAutoresizingFlexibleTopMargin    = 1 << 3,UIViewAutoresizingFlexibleHeight       = 1 << 4,UIViewAutoresizingFlexibleBottomMargin = 1 << 5
};

//普通枚举
typedef NS_ENUM(NSInteger,UIViewAnimationTransition) {
    UIViewAnimationTransitionNone,UIViewAnimationTransitionFlipFromLeft,UIViewAnimationTransitionFlipFromRight,UIViewAnimationTransitionCurlUp,UIViewAnimationTransitionCurlDown,};

OC位移枚举的使用

//OC里位移枚举的定义
    enum UIViewAnimationOptions option = UIViewAnimationOptionRepeat | UIViewAnimationOptionLayoutSubviews;

//OC里普通枚举的定义
    enum UIViewAnimationTransition option = UIViewAnimationTransitionFlipFromLeft;

swift的位移枚举的区分

//位移枚举
public struct UIViewAutoresizing : OptionSetType {
    public init(rawValue: UInt)

    public static var None: UIViewAutoresizing { get }
    public static var FlexibleLeftMargin: UIViewAutoresizing { get }
    public static var FlexibleWidth: UIViewAutoresizing { get }
    public static var FlexibleRightMargin: UIViewAutoresizing { get }
    public static var FlexibleTopMargin: UIViewAutoresizing { get }
    public static var FlexibleHeight: UIViewAutoresizing { get }
    public static var FlexibleBottomMargin: UIViewAutoresizing { get }
}

//普通枚举
public enum UIViewAnimationTransition : Int {

    case None
    case FlipFromLeft
    case FlipFromRight
    case CurlUp
    case CurlDown
}

swift位移枚举的使用

//swift里面位移枚举的定义
    let option:UIViewAnimationOptions = [.repeat,.layoutSubviews]

//swift里面普通枚举的定义
    let option:UIViewAnimationTransition = .flipFromLeft

@H_404_2@以上就是关于swift里面位移枚举的使用小结，如果写的有什么不对的欢迎大家补充，希望大家能学到，谢谢大家的阅读~