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Code Quality Rank: L4
Programming language: Objective-C
License: MIT License
Tags: Networking    
Latest version: v1.3.0

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README

RealReachability

Version License Platform Platform

We need to observe the REAL reachability of network for iOS. That's what RealReachability do.

Why RealReachability?

As we know, we already have reachability framework for us to choose. Such as the famous repository Reachability.

BUT we really need a tool for us to get the reachability, not the local connection!

Apple doc tells us something about SCNetworkReachability API: "Note that reachability does not guarantee that the data packet will actually be received by the host."

The called "reachability" we already know can only tell us the local connection status.These tools currently we know are all supported by the SCNetworkReachability API.

Now RealReachability can do this for you~

We introduce ping module for us to check the real network status, together with SCNetworkReachability API. And we use FSM(finite state machine) to control all of the network status to confirm that only status change will be sent to application.

Enjoy it!

Quick Start With Cocoapods

CocoaPods is a dependency manager for Objective-C, which automates and simplifies the process of using 3rd-party libraries like RealReachability in your projects. You can install it with the following command:

$ gem install cocoapods

Podfile

To integrate RealReachability into your Xcode project using CocoaPods, specify it in your Podfile:

source 'https://github.com/CocoaPods/Specs.git'
platform :ios, '8.0'

pod 'RealReachability'

Then, run the following command:

$ pod install

Installation with Carthage

Carthage is a decentralized dependency manager that builds your dependencies and provides you with binary frameworks.

You can install Carthage with Homebrew using the following command:

$ brew update
$ brew install carthage

RealReachability in your Cartfile:

github "dustturtle/RealReachability"

Manual Start

If you'd rather do everything by hand, just add the folder "RealReachability" to your project, then all of the files will be added to your project.

Dependencies

  • Xcode 5.0+ for ARC support, automatic synthesis and compatibility libraries. iOS 6.0+.
  • The SystemConfiguration Framework should be added to your project.

Usage

Start to notify(we suggest you to start notify in didFinishLaunchingWithOptions):


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    [GLobalRealReachability startNotifier];
    return YES;
}

Add Observer(anywhere you like):

[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(networkChanged:)
                                             name:kRealReachabilityChangedNotification
                                           object:nil];

Observer method like below:

- (void)networkChanged:(NSNotification *)notification
{
    RealReachability *reachability = (RealReachability *)notification.object;
    ReachabilityStatus status = [reachability currentReachabilityStatus];
    NSLog(@"currentStatus:%@",@(status));
}

Trigger realtime Reachability like below:

[GLobalRealReachability reachabilityWithBlock:^(ReachabilityStatus status) {
        switch (status)
        {
            case RealStatusNotReachable:
            {
            //  case NotReachable handler
                break;
            }

            case RealStatusViaWiFi:
            {
            //  case WiFi handler
                break;
            }

            case RealStatusViaWWAN:
            {
            //  case WWAN handler
                break;
            }

            default:
                break;
        }
    }];

Query currentStatus

ReachabilityStatus status = [reachability currentReachabilityStatus];

Once the reachabilityWithBlock was called, the "currentReachabilityStatus" will be refreshed synchronously.

Set your own host for Ping (optional)

Note that now we introduced the new feature "doublecheck" to make the status more reliable in 1.2.0!

Please make sure the host you set here is available for pinging. Large, stable website suggested.
This step is optional. If you do not set this, our default host is: www.apple.com.
You may set your own host any time you like. Codes just like below:

GLobalRealReachability.hostForPing = @"www.apple.com";
GLobalRealReachability.hostForCheck = @"www.youOwnHostExample.com";

We suggest you use two hosts: one your own(if you have one available for pinging), one public; Just like the example below.

For more details about the "doublecheck" feature, you can go deep into the codes.

Get current WWAN type (optional)

 WWANAccessType accessType = [GLobalRealReachability currentWWANtype];

Current WWAN type might be used to improve your app's user experience(e.g, set different network request timeout interval for different WWAN type).

Check the VPN status of your network

- (BOOL)isVPNOn;

With the help of this method, we have improved our reachability check logic when using VPN.

More:

We can also use PingHelper or LocalConnection alone to make a ping action or just observe the local connection.
Pod usage like blow (we have two pod subspecs):

pod 'RealReachability/Ping'
pod 'RealReachability/Connection'

This is the only API we need to invoke about Ping:

- (void)pingWithBlock:(void (^)(BOOL isSuccess))completion;

More about the ping usage, please see the PingHelper.h or codes in the demo project.

LocalConnection module is very similar with Reachability.
More about its usage, please see the LocalConnection.h or codes in the demo project.

Demo

We already put the demo project in the repository.

License

RealReachability is released under the MIT license. See LICENSE for details.

And finally...

Please use and improve! Patches accepted, or create an issue.

I'd love it if you could send me a note as to which app you're using it with! Thank you!

支持我

老司机技术周报出品的《WWDC 内参》系列,一直是 iOS 开发的精品阅读,几乎涵盖了每年需要了解的所有 iOS 新技术。尤其是今年《WWDC21 内参》的质量比去年有了比较大的提升, 作为作者之一,在这里安利给大家: https://xiaozhuanlan.com/wwdc21?rel=4203097925。目前活动价五折销售,抓紧入手啦。

中文版使用指南


*Note that all licence references and agreements mentioned in the RealReachability README section above are relevant to that project's source code only.