Question

我想创建用于检查互联网连接的公共类，当互联网改变其状态时，它应该通知我。

我正在使用AFNetworking检查互联网状态。

这是我试过的代码，但它不起作用请帮助我犯错误的地方？

CheckInternet是我从NSObject

派生的公共类

CheckInternet.h

#import <Foundation/Foundation.h>

@interface CheckInternet : NSObject

+ (void)startNetworkMonitoring;
+ (BOOL)isInternetConnectionAvailable;
@end

CheckInternet.m

#import "CheckInternet.h"
#import "AFNetworking.h"

@implementation CheckInternet


+ (void)startNetworkMonitoring
{
    [[AFNetworkReachabilityManager sharedManager] startMonitoring];
    [[AFNetworkReachabilityManager sharedManager] setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
        NSLog(@"Reachability: %@", AFStringFromNetworkReachabilityStatus(status));

        // Check the reachability status and show an alert if the internet connection is not available
        switch (status) {
            case -1:
                // AFNetworkReachabilityStatusUnknown = -1,
                NSLog(@"The reachability status is Unknown");
                break;
            case 0:
                // AFNetworkReachabilityStatusNotReachable = 0
                NSLog(@"The reachability status is not reachable");
                break;
            case 1:
                NSLog(@"The reachability status is reachable via wan");
                [[NSNotificationCenter defaultCenter] postNotificationName:@"reachabilityChanged" object:nil];
                break;
            case 2:
                // AFNetworkReachabilityStatusReachableViaWiFi = 2
                NSLog(@"The reachability status is reachable via WiFi");

                [[NSNotificationCenter defaultCenter] postNotificationName:@"reachabilityChanged" object:nil];
                break;

            default:
                break;
        }

    }];
}

#pragma mark - Check Internet Network Status
+ (BOOL)isInternetConnectionAvailable {
    return [AFNetworkReachabilityManager sharedManager].reachable;
}

@end

在我的ViewController.m（此处我想检查互联网状态）

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];



     [CheckInternet startNetworkMonitoring];


    if ([CheckInternet isInternetConnectionAvailable])
    {
         NSLog(@"---- Internet YES------ ");
    }
    else
    {
         NSLog(@"----- Internet NO------ ");
    }
}

//This is not called...
- (void)reachabilityChanged:(NSNotification *)notification
{
    NSLog(@"---- reachabilityChanged ----");
}

提前感谢您！

Answer 1

首先，我建议您开始在AppDelegate中监控您的网络活动。将[CheckInternet startNetworkMonitoring];移至didFinishLaunchingWithOptions

其次，将以下行添加到case == 0：

 [[NSNotificationCenter defaultCenter] postNotificationName:@"reachabilityChanged" object:[NSNumber numberWithInteger:one]];

另外请确保您使用通知发布连接状态。因为它是一个整数，所以需要将它包装在一个对象中（通常包含在NSNumber中）。

第三，您需要遵守reachabilityChanged通知。在viewDidLoad。

中添加此内容

 [[NSNotificationCenter defaultCenter] addObserver:self
        selector:@selector(reachabilityChanged:) 
        name:@"reachabilityChanged"
        object:nil];

在你的函数- (void)reachabilityChanged:(NSNotification *)notification中，你应该能够访问通知的userInfo属性并读取那里的状态代码。

此外，一旦viewController消失，请不要忘记取消观察通知。所以在dealloc

[NSNotificationCenter defaultCenter] removeObserver:self];

使用AFNetworking

1 个答案: