如何通过可达性检测网络变化？

发布于 2024-12-15 05:02:06 字数 418 浏览 6 评论 0原文

我目前正在使用以下方法检查 viewDidLoad 上的网络连接：

-(BOOL)reachable {
    ReachabilityDRC *r = [ReachabilityDRC reachabilityWithHostName:@"google.com"];
    NetworkStatus internetStatus = [r currentReachabilityStatus];
    if(internetStatus == NotReachable) {
        return NO;
    }
    return YES;
}

但我也希望在网络发生变化时收到通知，例如 wifi 断开或 wifi 恢复，以便我可以进行相应的更改。

我该如何调整我的方法来做这样的事情？

原文

I'm currently checking network connection on viewDidLoad using this:

-(BOOL)reachable {
    ReachabilityDRC *r = [ReachabilityDRC reachabilityWithHostName:@"google.com"];
    NetworkStatus internetStatus = [r currentReachabilityStatus];
    if(internetStatus == NotReachable) {
        return NO;
    }
    return YES;
}

But I also want to be notified if there is a change of network, such as wifi dropped, or wifi is back, so I can make changes accordingly.

How can I adjust my method to do something like that?

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喜爱皱眉﹌ 2024-12-22 05:02:06

1- 将 SystemConfiguration.framework 添加到您的项目中。

2- 从 GitHub 下载以下文件

Reachability.h
Reachability.m

3- 添加这些项目中的文件

4- 在 YourViewController.h 中添加 @class Reachability;

#import <UIKit/UIKit.h>

@class Reachability;

5- 在 YourViewController.h 中添加变量 Reachability* internetReachable; YourViewController.h

#import <UIKit/UIKit.h>

@class Reachability;

@interface YourViewController : UIViewController {
    Reachability* internetReachable;
}

6- 在 YourViewController.m 中添加 Reachability.h

#import "YourViewController.h"
#import "Reachability.h"

7- 在 -(void)ViewDidLoad 中添加以下行code> 在 YourViewController.m

-(void)ViewDidLoad {
    [[NSNotificationCenter defaultCenter] 
                       addObserver:self 
                       selector:@selector(checkNetworkStatus:) 
                       name:kReachabilityChangedNotification 
                       object:nil];

    internetReachable = [Reachability reachabilityForInternetConnection];
    [internetReachable startNotifier];
}

8- 在 -(void)viewDidLoad 之后添加以下函数

-(void) checkNetworkStatus:(NSNotification *)notice
{
    // called after network status changes
    NetworkStatus internetStatus = [internetReachable currentReachabilityStatus];
    switch (internetStatus)
    {
        case NotReachable:
        {
            NSLog(@"The internet is down.");
            break;
        }
        case ReachableViaWiFi:
        {
            NSLog(@"The internet is working via WIFI.");
            break;
        }
        case ReachableViaWWAN:
        {
            NSLog(@"The internet is working via WWAN.");
            break;
        }
    }
}

现在，每次互联网连接的变化您都会在控制台中看到登录。

1- add SystemConfiguration.framework to your project.

2- Download following files from GitHub

Reachability.h
Reachability.m

3- Add these files in your projects

4- add @class Reachability; in YourViewController.h

#import <UIKit/UIKit.h>

@class Reachability;

5- add variable Reachability* internetReachable; in YourViewController.h

#import <UIKit/UIKit.h>

@class Reachability;

@interface YourViewController : UIViewController {
    Reachability* internetReachable;
}

6- add Reachability.h in YourViewController.m

#import "YourViewController.h"
#import "Reachability.h"

7- add following lines in -(void)ViewDidLoad in YourViewController.m

-(void)ViewDidLoad {
    [[NSNotificationCenter defaultCenter] 
                       addObserver:self 
                       selector:@selector(checkNetworkStatus:) 
                       name:kReachabilityChangedNotification 
                       object:nil];

    internetReachable = [Reachability reachabilityForInternetConnection];
    [internetReachable startNotifier];
}

8- add following function after -(void)viewDidLoad

-(void) checkNetworkStatus:(NSNotification *)notice
{
    // called after network status changes
    NetworkStatus internetStatus = [internetReachable currentReachabilityStatus];
    switch (internetStatus)
    {
        case NotReachable:
        {
            NSLog(@"The internet is down.");
            break;
        }
        case ReachableViaWiFi:
        {
            NSLog(@"The internet is working via WIFI.");
            break;
        }
        case ReachableViaWWAN:
        {
            NSLog(@"The internet is working via WWAN.");
            break;
        }
    }
}

Now every change of internet connection you will see log in console.

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孤独陪着我 2024-12-22 05:02:06

另一种可能的解决方案是在“application didfinishlaunching”中添加 NS 通知：

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(checkForReachability) name:kReachabilityChangedNotification object:nil];

并在 checkForReachability 方法中执行以下操作：

    Reachability *reachability = [Reachability reachabilityForInternetConnection];
    [reachability startNotifier];

    NetworkStatus remoteHostStatus = [reachability currentReachabilityStatus];

    if(remoteHostStatus == NotReachable) {
        //Do something
    }
     else if (remoteHostStatus == ReachableViaWiFi) {
    // Do something
 }
    else{

// Else do something else
}

Another possible solution is to add a NS Notification in "application didfinishlaunching":

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(checkForReachability) name:kReachabilityChangedNotification object:nil];

and in checkForReachability method do this:

    Reachability *reachability = [Reachability reachabilityForInternetConnection];
    [reachability startNotifier];

    NetworkStatus remoteHostStatus = [reachability currentReachabilityStatus];

    if(remoteHostStatus == NotReachable) {
        //Do something
    }
     else if (remoteHostStatus == ReachableViaWiFi) {
    // Do something
 }
    else{

// Else do something else
}

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