iOS-网络相关

第一.HTTP相关

传送门

第二.网络开发

超级传送门

第三.Swift版后台开发

跨星际传送门

=================获取网络信号======================

第一.Reachability 方法

    _1.导入 Reachability.h 和 Reachability.m 文件 (自行下载)_

    _2.相关控制器导入头文件和库文件 SystemConfiguration.framework_

    _3.创建相关属性:_

            @property (nonatomic, strong) Reachability *reachability;

    _4.相关申明:_

             [[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(reachabilityChanged:)
                                             name:kReachabilityChangedNotification
                                           object:nil];
            self.reachability = [Reachability reachabilityWithHostname:@"www.baidu.com"];
            [self.reachability startNotifier];

    _5.相关方法:_

                  _5.相关方法:_

            #pragma mark - 私有方法
            
            //   实时监听网络状态
            - (void)reachabilityChanged:(NSNotification *)notification
            {
                Reachability* curReach = [notification object];
                NSParameterAssert([curReach isKindOfClass:[Reachability class]]);
                [self updateInterfaceWithReachability:curReach];
            }
            
            - (void)updateInterfaceWithReachability:(Reachability *)reachability
            {
                if (reachability == _reachability)
                {
                    NetworkStatus netStatus = [reachability currentReachabilityStatus];
                    switch (netStatus)
                    {
                        case NotReachable:   {
                            NSLog(@"没有网络！");
                            UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"友情提醒" message:@"暂无网络!请检查网络!" preferredStyle:UIAlertControllerStyleAlert];
                            [alert addAction:[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
                                [SVProgressHUD showWithStatus:@"数据恢复中!"];
                            }]];
                            [self presentViewController:alert animated:true completion:nil];
                            break;
                        }
                        case ReachableViaWWAN: {
                            NSLog(@"4G/3G");
                            [self loadingWeb];
                            [SVProgressHUD dismiss];
                            break;
                        }
                        case ReachableViaWiFi: {
                            NSLog(@"WiFi");
                            [self loadingWeb];
                            [SVProgressHUD dismiss];
                            break;
                        }
                    }
                }
            }

第二.从状态栏中获取网络类型，(弊端:手机无sim卡时,无法读取)：

    - (NSString *)getNetWorkStates{
        UIApplication *app = [UIApplication sharedApplication];
        NSArray *children = [[[app valueForKeyPath:@"statusBar"]valueForKeyPath:@"foregroundView"]subviews];
        NSString *state = [[NSString alloc]init];
        int netType = 0;
        //获取到网络返回码
        for (id child in children) {
            if ([child isKindOfClass:NSClassFromString(@"UIStatusBarDataNetworkItemView")]) {
                //获取到状态栏
                netType = [[child valueForKeyPath:@"dataNetworkType"]intValue];
                
                switch (netType) {
                    case 0:
                        state = @"无网络";
                        //无网模式
                        break;
                    case 1:
                        state =  @"2G";
                        break;
                    case 2:
                        state =  @"3G";
                        break;
                    case 3:
                        state =   @"4G";
                        break;
                    case 5:
                    {
                        state =  @"wifi";
                        break;
                    default:
                        break;
                    }
                }
            }
            //根据状态选择
        }
        return state;
    }