OC和Swift中的Options

1. OC 和 Swift 中的区别

OC中定义Options

typedef NS_OPTIONS(NSUInteger, OCOptions) {    OC_Sound = 1 << 0,    OC_Title = 1 << 1,    OC_Vibrate = 1 << 2,};

Swift 中定义Options

// 需要实现OptionSetType协议struct SwiftOptions: OptionSetType {    let rawValue: UInt    init(rawValue: UInt) { self.rawValue = rawValue }    static let Swift_Sound = SwiftOptions(rawValue: 1 << 0)    static let Swfit_Title = SwiftOptions(rawValue: 1 << 1)    static let Swift_Vibrate = SwiftOptions(rawValue: 1 << 2 )}

* 在Swift中，可以调用OC的Options，但是，在OC中，不能调用Swift中的Options。 *

在OC中，不能调用Swift中定义的：

• Generics
• Tuples
• Enumerations defined in Swift without Int raw value type
• Structures defined in Swift
• Top-level functions defined in Swift
• Global variables defined in Swift
• Typealiases defined in Swift
• Swift-style variadics
• Nested types
• Curried functions

2.操作

并操作（Union）

* ObjectiveC *

OCOptions options = OC_Sound | OC_Title;

* swift *

let options = Swift_Sound.union(Swift_Vibrate)print(options)

删除选项组合的一部分

* ObjectiveC *

OCOptions options = OC_Sound | OC_Title; // 3// 删除OC_Sound选项OCOptions modifiedOptions = options & (~OC_Sound); // 2

* swift *

let options = Swift_Sound.union(Swfit_Title) // 3let modifiedOptions = SwiftOptions(rawValue: options.rawValue - Swfit_Title.rawValue) // 1