用AFN做网络判断

//创建一个基于AFHTTPSessionManager 的类

#import <Foundation/Foundation>

#import "AFHTTPSessionManager.h"

@interfaceAFAppDotNetAPIClient :AFHTTPSessionManager

//创建单例,在需要网络判断的地方调用

+ (instancetype)sharedClient;

@end

#import"AFAppDotNetAPIClient.h"

//全局静态变量 是测试网络用到的网址

static NSString*const AFAppDotNetAPIBaseURLString =@"https://api.app.net/";

@implementationAFAppDotNetAPIClient

//实现单例方法

+ (instancetype)sharedClient {

staticAFAppDotNetAPIClient*_sharedClient =nil;

//用dispatch_once 函数 解决线程问题 防止多线程时被不同线程同时调用  类似加锁的功能

staticdispatch_once_tonceToken;

dispatch_once(&onceToken, ^{

_sharedClient = [[AFAppDotNetAPIClientalloc]initWithBaseURL:[NSURLURLWithString:AFAppDotNetAPIBaseURLString]];

_sharedClient.securityPolicy= [AFSecurityPolicypolicyWithPinningMode:AFSSLPinningModeNone];

//网络判断的内部实现        [_sharedClient.reachabilityManagersetReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatusstatus) {

switch(status) {

caseAFNetworkReachabilityStatusReachableViaWWAN:

NSLog(@"-------AFNetworkReachabilityStatusReachableViaWWAN------");

break;

caseAFNetworkReachabilityStatusReachableViaWiFi:

NSLog(@"-------AFNetworkReachabilityStatusReachableViaWiFi------");

break;

caseAFNetworkReachabilityStatusNotReachable:

NSLog(@"-------AFNetworkReachabilityStatusNotReachable------");

break;

default:

break;

}

}];

[_sharedClient.reachabilityManagerstartMonitoring];

});

return_sharedClient;

}

//用if判断网络状态 增加了自动提示---提示框

if(status ==

AFNetworkReachabilityStatusReachableViaWWAN) {

UIAlertView*alertView = [[UIAlertViewalloc]initWithTitle:@"温馨提示"message:@"目前3G网络状态良好"delegate:selfcancelButtonTitle:nilotherButtonTitles:nil,nil];

[alertViewshow];

alertView.cancelButtonIndex=1;

//让alertView自动取消这里的self是指shareClient

[selfperformSelector:@selector(dissAlertView:)withObject:alertViewafterDelay:1.0];

//WiFi

}elseif(status ==AFNetworkReachabilityStatusReachableViaWiFi){

UIAlertView*alertView = [[UIAlertViewalloc]initWithTitle:@"温馨提示"message:@"目前是WiFi网络"delegate:selfcancelButtonTitle:nil

otherButtonTitles:nil,nil];

[alertViewshow];

//让alertView自动取消

[selfperformSelector:@selector(dissAlertView:)withObject:alertViewafterDelay:1.0];

//无网络

}elseif(status ==AFNetworkReachabilityStatusNotReachable){

UIAlertView*alertView = [[UIAlertViewalloc]initWithTitle:@"温馨提示"message:@"无法找到网络"delegate:selfcancelButtonTitle:nilotherButtonTitles:nil,nil];

[alertViewshow];

[selfperformSelector:@selector(dissAlertView:)withObject:alertViewafterDelay:1.0];

}

}];

[shareClient.reachabilityManagerstartMonitoring];

});

returnshareClient;

}

//在单例里面 这个方法必须写为加号方法

因为在上面的网络判断中 我们在return 前就调用了这个方法,而调用时实例还没有产生,所以用减号方法会崩溃的 ;

//alertView自动消失的实现方法

+ (void)dissAlertView:(UIAlertView*)alertView

{

if(alertView) {

[alertViewdismissWithClickedButtonIndex:[alertViewcancelButtonIndex]animated:YES];

}

[alertViewrelease];

}