返回上级目录：swift,oc语法（苹果文档）和对比

OC

1.oc的枚举值相当于这个文件中的一个局部变量,只能是整型

2.不同枚举中，枚举名称不可以一样，在同一文件

实例代码

#import "ViewController.h"enum Week {one = 100, two, three = 500, four
};@interface ViewController ()@property(nonatomic,assign) enum Week week;@end@implementation ViewController- (void)viewDidLoad {[super viewDidLoad];UIView *view = [UIView new];self.week = two;switch (self.week) {case one:NSLog(@"%d",one);break;default:NSLog(@"%d",four);break;}// Do any additional setup after loading the view.
}@end

参考博客：
iOS（三）OC中的枚举(NS_ENUM和NS_OPTION)

swift

3.枚举里可以写方法

4.枚举的rawValue可以是Float(float也是赋值的后面依次＋1)或是String，或是没有

enum Suit{case spades, hearts, diamonds, clubsfunc simpleDescription() -> String {switch self {case .spades:return "spades"case .hearts:return "hearts"case .diamonds:return "diamonds"case .clubs:return "clubs"}}func color() -> String {switch self {case .spades, .clubs:return "black"default:return "red"}}
}

5.可以用Rank(rawValue: 3)方法创建一个枚举实例

if let convertedRank = Rank(rawValue: 3) {let threeDescription = convertedRank.simpleDescription()
}

6.枚举实例可以带参数

enum ServerResponse {case result(String, String)case failure(String)
}let success = ServerResponse.result("6:00 am", "8:09 pm")
let failure = ServerResponse.failure("Out of cheese.")switch success {
case let .result(sunrise, sunset):print("Sunrise is at \(sunrise) and sunset is at \(sunset).")
case let .failure(message):print("Failure...  \(message)")
}
// Prints "Sunrise is at 6:00 am and sunset is at 8:09 pm."