如何检查iOS设备上的互联网连接？
我想知道如何检查用户是否通过WIFI或蜂窝数据3G或4G连接到互联网。
另外我不想检查一个网站是否可到达，我想检查是否有设备上的互联网的东西。 我试图通过互联网查看所有我看到的是，他们检查网站是否可达或使用Rechability类。
我想检查当用户打开我的应用程序时是否有networking。
我正在使用Objective-C的Xcode6。
使用此代码并导入Reachability.h文件
if ([[Reachability reachabilityForInternetConnection]currentReachabilityStatus]==NotReachable) { //connection unavailable } else { //connection available }
首先从这个链接下载可达性类：
来自Github的可重用性
在AppDelegate.h中添加实例的可达性
@property (nonatomic) Reachability *hostReachability; @property (nonatomic) Reachability *internetReachability; @property (nonatomic) Reachability *wifiReachability;
在您的AppDelegate中导入可达性，并将其复制并放在Appdelegate.m中
- (id)init { self = [super init]; if (self != nil) { //[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(reachabilityChanged:) name:kReachabilityChangedNotification object:nil]; NSString *remoteHostName = @"www.google.com"; self.hostReachability = [Reachability reachabilityWithHostName:remoteHostName]; [self.hostReachability startNotifier]; self.internetReachability = [Reachability reachabilityForInternetConnection]; [self.internetReachability startNotifier]; self.wifiReachability = [Reachability reachabilityForLocalWiFi]; [self.wifiReachability startNotifier]; } return self; }
在你的公共类中添加这个方法。
/*================================================================================================ Check Internet Rechability =================================================================================================*/ +(BOOL)checkIfInternetIsAvailable { BOOL reachable = NO; NetworkStatus netStatus = [APP_DELEGATE1.internetReachability currentReachabilityStatus]; if(netStatus == ReachableViaWWAN || netStatus == ReachableViaWiFi) { reachable = YES; } else { reachable = NO; } return reachable; }
请注意， APP_DELEGATE1是AppDelegate的一个实例
/* AppDelegate object */ #define APP_DELEGATE1 ((AppDelegate*)[[UIApplication sharedApplication] delegate])
您可以使用这种方法检查应用程序中的任
这很简单，你可以使用下面的方法来检查互联网连接。
-(BOOL)IsConnectionAvailable { Reachability *reachability = [Reachability reachabilityForInternetConnection]; NetworkStatus networkStatus = [reachability currentReachabilityStatus]; return !(networkStatus == NotReachable); }
希望这可以帮助你在Wifi模式下进行networking连接：
Utils.h
#import <Foundation/Foundation.h> @interface Utils : NSObject +(BOOL)isNetworkAvailable; @end
utils.m
+ (BOOL)isNetworkAvailable { CFNetDiagnosticRef dReference; dReference = CFNetDiagnosticCreateWithURL (NULL, (__bridge CFURLRef)[NSURL URLWithString:@"www.apple.com"]); CFNetDiagnosticStatus status; status = CFNetDiagnosticCopyNetworkStatusPassively (dReference, NULL); CFRelease (dReference); if ( status == kCFNetDiagnosticConnectionUp ) { NSLog (@"Connection is Available"); return YES; } else { NSLog (@"Connection is down"); return NO; } }
//现在在需要的类中使用它
- (IBAction)MemberSubmitAction:(id)sender { if([Utils isNetworkAvailable] ==YES){ NSlog(@"Network Connection available"); } }
试试这个来检查networking连接与否
NSURL *url = [NSURL URLWithString:@"http://www.appleiphonecell.com/"]; NSMutableURLRequest *headRequest = [NSMutableURLRequest requestWithURL:url]; headRequest.HTTPMethod = @"HEAD"; NSURLSessionConfiguration *defaultConfigObject = [NSURLSessionConfiguration ephemeralSessionConfiguration]; defaultConfigObject.timeoutIntervalForResource = 10.0; defaultConfigObject.requestCachePolicy = NSURLRequestReloadIgnoringLocalAndRemoteCacheData; NSURLSession *defaultSession = [NSURLSession sessionWithConfiguration:defaultConfigObject delegate:nil delegateQueue: [NSOperationQueue mainQueue]]; NSURLSessionDataTask *dataTask = [defaultSession dataTaskWithRequest:headRequest completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) { if (!error && response) { block([(NSHTTPURLResponse *)response statusCode] == 200); }else{ block(FALSE); } }]; [dataTask resume];
“可达性”不起作用，因为它不会检测主机是否有响应。 它只会检查客户端是否可以向主机发送数据包。 所以，即使您连接到WiFinetworking，并且WiFi的networking连接断开或服务器closures，您也可以获得“是”，以便进入。
更好的方法是尝试HTTP请求并validation响应。
示例如下：
NSURL *pageToLoadUrl = [[NSURL alloc] initWithString:@"https://www.google.com/"]; NSMutableURLRequest *pageRequest = [NSMutableURLRequest requestWithURL:pageToLoadUrl]; [pageRequest setTimeoutInterval:2.0]; AFHTTPRequestOperation *pageOperation = [[AFHTTPRequestOperation alloc] initWithRequest:pageRequest]; AFRememberingSecurityPolicy *policy = [AFRememberingSecurityPolicy policyWithPinningMode:AFSSLPinningModeNone]; [policy setDelegate:self]; currentPageOperation.securityPolicy = policy; if (self.ignoreSSLCertificate) { NSLog(@"Warning - ignoring invalid certificates"); currentPageOperation.securityPolicy.allowInvalidCertificates = YES; } [pageOperation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) { internetActive = YES; } failure:^(AFHTTPRequestOperation *operation, NSError *error){ NSLog(@"Error:------>%@", [error description]); internetActive = NO; }]; [pageOperation start];
唯一可以接受的是，“internetActive”的更新延迟时间超过了上面代码中提到的超时时间。 你可以在callback里面编码来处理状态。
更新了Swift 4.0和AlamoFire的答案：
我在9月18日发布的答案是不正确的，它只能检测它是否连接到networking，而不是互联网。 这里是使用AlamoFire的正确解决scheme：
1）创build自定义Reachability Observer类：
import Alamofire class ReachabilityObserver { fileprivate let reachabilityManager = NetworkReachabilityManager() fileprivate var reachabilityStatus: NetworkReachabilityManager.NetworkReachabilityStatus = .unknown var isOnline: Bool { if (reachabilityStatus == .unknown || reachabilityStatus == .notReachable){ return false }else{ return true } } static let sharedInstance = ReachabilityObserver() fileprivate init () { reachabilityManager?.listener = { [weak self] status in self?.reachabilityStatus = status NotificationCenter.default.post( name: NSNotification.Name(rawValue: ClickUpConstants.ReachabilityStateChanged), object: nil) } reachabilityManager?.startListening() } }
2）初始化应用程序启动
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool { _ = ReachabilityObserver.sharedInstance return true }
3）在你的应用程序的任何地方使用这个来检测是否在线，如在视图中加载，或者什么时候发生
if (ReachabilityObserver.sharedInstance.isOnline){ //User is online }else{ //User is not online }
尝试这个
检查这个链接的可达性文件
可达性
在.m中导入这个文件然后编写代码
//这是检查互联网连接
BOOL hasInternetConnection = [[Reachability reachabilityForInternetConnection] isReachable]; if (hasInternetConnection) { // your code }
希望能帮助到你。
Reachability* reachability = [Reachability reachabilityWithHostName:@"www.google.com"]; NetworkStatus internetStatus = [reachability currentReachabilityStatus]; if(remoteHostStatus == ReachableViaWWAN || remoteHostStatus == ReachableViaWiFi) { //my web-dependent code } else { //there-is-no-connection warning }
使用Alamofire库 ：
let reachabilityManager = NetworkReachabilityManager() let isReachable = reachabilityManager.isReachable if (isReachable) { //Has internet }else{ //No internet }