1.头文件

#import <Foundation/Foundation.h>

2.宏定义

#define A a

3.枚举/静态变量等

typedef NS_ENUM(NSInteger, AFNetworkReachabilityStatus) {

    AFNetworkReachabilityStatusUnknown          = -1,     AFNetworkReachabilityStatusNotReachable     = 0,     AFNetworkReachabilityStatusReachableViaWWAN = 1,     AFNetworkReachabilityStatusReachableViaWiFi = 2,

};

static dispatch_queue_t http_request_operation_processing_queue() {

    static dispatch_queue_t af_http_request_operation_processing_queue;     static dispatch_once_t onceToken;     dispatch_once(&onceToken, ^{         af_http_request_operation_processing_queue = dispatch_queue_create("com.alamofire.networking.http-request.processing", DISPATCH_QUEUE_CONCURRENT);     });     return af_http_request_operation_processing_queue;

}

4.接口

AFNetworkReachabilityManager : NSObject

(1)属性

(readonly, nonatomic, assign) AFNetworkReachabilityStatus networkReachabilityStatus;

(2)方法

+ (instancetype)sharedManager;