AFNetworking序列化与网络监测

AFNetworking内部会自动反序列化，默认是解析JSON

-(void)json
{
    //1.创建会话管理者
    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
    
    //2.get请求
    NSDictionary *dict = @{
                           @"username":@"afn",
                           @"pwd":@"afn",
                           @"type":@"JSON",
                           };
    
    //AFN内部会自动进行反序列化处理(JSON)
    [manager GET:@"http://120.25.226.186:32812/login" parameters:dict progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
        NSLog(@"成功--%@---%@",responseObject,[responseObject class]);
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        NSLog(@"失败-=-%@",error);
    }];
    
}

服务器返回的是XML的数据格式时的解析

-(void)xml
{
    //1.创建会话管理者
    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
    
    //告诉AFN以XML的方式来解析数据
    manager.responseSerializer = [AFXMLParserResponseSerializer serializer];
    
    //2.get请求
    NSDictionary *dict = @{
                           @"type":@"XML",
                           };
    
    //AFN内部会自动进行反序列化处理(JSON)
    [manager GET:@"http://120.25.226.186:32812/video" parameters:dict progress:nil success:^(NSURLSessionDataTask * _Nonnull task, NSXMLParser *parser) {
//        NSLog(@"成功--%@---%@",responseObject,[responseObject class]);
        
        //设置代理
        parser.delegate = self;
        
        //开始解析
        [parser parse];
        
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        NSLog(@"失败-=-%@",error);
    }];
}

解析xml数据的代理方法

pragma mark ----------------------
#pragma mark NSXMLParserDelegate
//elementName：返回文件名；attributeDict：文件属性
-(void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary<NSString *,NSString *> *)attributeDict
{
    NSLog(@"%@--%@",elementName,attributeDict);
}

HTML网页的解析

-(void)httphtml
{
    //1.创建会话管理者
    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
    
    //设置不解析,一服务器返回的格式接收
    manager.responseSerializer = [AFHTTPResponseSerializer serializer];
    
    //2.get请求
    //AFN内部会自动进行反序列化处理(JSON)
    [manager GET:@"http://www.baidu.com" parameters:nil progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
        
        NSLog(@"--%@---%@",[[NSString alloc]initWithData:responseObject encoding:NSUTF8StringEncoding],[responseObject class]);
        
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        
        NSLog(@"失败-=-%@",error);
    }];
}

AFN网络监测

-(void)afn
{
    //1.创建网络监测管理者
    AFNetworkReachabilityManager  *manager = [AFNetworkReachabilityManager sharedManager];
    
    //2.检测
    /*
     AFNetworkReachabilityStatusUnknown          = -1,   未知
     AFNetworkReachabilityStatusNotReachable     = 0,    没有网络
     AFNetworkReachabilityStatusReachableViaWWAN = 1,    蜂窝网络3G|4G
     AFNetworkReachabilityStatusReachableViaWiFi = 2,    WIFI
     */
    [manager setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
        switch (status) {
            case AFNetworkReachabilityStatusReachableViaWiFi:
                NSLog(@"wifi");
                break;
            case AFNetworkReachabilityStatusReachableViaWWAN:
                NSLog(@"蜂窝网络3G|4G");
                break;
            case AFNetworkReachabilityStatusNotReachable:
                NSLog(@"没有网络");
                break;
            case AFNetworkReachabilityStatusUnknown:
                NSLog(@"未知");
                break;
            default:
                break;
        }
    }];
    
    //3.开始监测
    [manager startMonitoring];

}

系统自带的网络监测
要导入Reachability头文件

#import "ViewController.h"
#import "AFNetworking.h"
#import "Reachability.h"

@interface ViewController ()<NSXMLParserDelegate>
/** Reachability*/
@property (nonatomic ,strong)Reachability *r;
@end

@implementation ViewController

-(void)viewDidLoad
{
    [super viewDidLoad];

    //注册通知
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(reachabilityChange) name:kReachabilityChangedNotification object:nil];
    
    self.r = [Reachability reachabilityForInternetConnection];
    [self.r startNotifier];
}

-(void)reachabilityChange
{
    /*
     NotReachable = 0,  没有网络
     ReachableViaWiFi,  WIFI
     ReachableViaWWAN   蜂窝网络
     */
    //首先获得一个Reachability 有状态的
    if([Reachability reachabilityForInternetConnection].currentReachabilityStatus == ReachableViaWWAN)
    {
        NSLog(@"蜂窝网络");
        return;
    }
    
    if ([Reachability reachabilityForLocalWiFi].currentReachabilityStatus == ReachableViaWiFi) {
        NSLog(@"WIFI");
        return ;
    }
    
    NSLog(@"没有网络");
}

注册通知要移除监听对象并且Reachability要调用stopNotifier方法

-(void)dealloc
{
    [[NSNotificationCenter defaultCenter] removeObserver:self];
    [self.r stopNotifier];
    
}