1、使用cocoapods集成PingUtil

2、在导入、新增、修改的时候刷新ping值

Pods/XYPingUtil/PingUtil/PingUtil.h

@@ -0,0 +1,24 @@
+//
+//  PingUtil.h
+//  PingUtil
+//
+//  Created by Rudy Yang on 2017/10/18.
+//  Copyright © 2017年 Rudy Yang. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+FOUNDATION_EXPORT double PingUtil_maxOSVersionNumber;
+
+FOUNDATION_EXPORT const unsigned char PingUtil_maxOSVersionString[];
+
+@interface PingUtil : NSObject
+
+@property (strong, nonatomic) NSMutableDictionary *pingTimers;
+
++ (void)pingHost:(NSString *)host success:(void(^)(NSInteger msCount))success failure:(void(^)(void))failure;
+
++ (void)pingHosts:(NSArray<NSString *> *)hosts success:(void(^)(NSArray<NSNumber *>* msCounts))success failure:(void(^)(void))failure;
+
+
+@end