Reachability用於在任何地方判斷網路是否可用

標籤：ios開發   ios   cocoa   網路   delegate   

#import <UIKit/UIKit.h>#import "Reachability.h"@interface AppDelegate : UIResponder <UIApplicationDelegate>@property (strong, nonatomic) UIWindow *window;@property (strong, nonatomic) Reachability *reach;@end

#import "AppDelegate.h"#import "MainViewController.h"@implementation AppDelegate- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];    // Override point for customization after application launch.    self.window.backgroundColor = [UIColor whiteColor];        self.window.rootViewController = [[MainViewController alloc]init];        ///開啟網路狀況的監聽    [[NSNotificationCenter defaultCenter] addObserver:self                                             selector:@selector(reachabilityChanged:)                                                 name:kReachabilityChangedNotification                                               object:nil];        self.reach = [Reachability reachabilityWithHostName:@"www.baidu.com"];        [self.reach startNotifier]; //開始監聽，會啟動一個run loop            [self.window makeKeyAndVisible];    return YES;}//通知-(void)reachabilityChanged:(NSNotification*)note{    Reachability * reach = [note object];    NSParameterAssert([reach isKindOfClass: [Reachability class]]);    NetworkStatus status = [reach currentReachabilityStatus];    //    //用於檢測是否是WIFI//    NSLog(@"%d",([[Reachability reachabilityForLocalWiFi] currentReachabilityStatus] != NotReachable));//    //用於檢查是否是3G//    NSLog(@"%d",([[Reachability reachabilityForInternetConnection] currentReachabilityStatus] != NotReachable));        if (status == NotReachable) {        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:nil message:@"網路已斷開" delegate:nil cancelButtonTitle:@"確定" otherButtonTitles:nil];        [alertView show];        NSLog(@"Notification Says Unreachable");    }else if(status == ReachableViaWWAN){                        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:nil message:@"移動網路" delegate:nil cancelButtonTitle:@"確定" otherButtonTitles:nil];        [alertView show];        NSLog(@"Notification Says mobilenet");    }else if(status == ReachableViaWiFi){                UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:nil message:@"WIfi網路" delegate:nil cancelButtonTitle:@"確定" otherButtonTitles:nil];        [alertView show];        NSLog(@"Notification Says wifinet");    }    }- (void)dealloc {    // 刪除通知對象    [[NSNotificationCenter defaultCenter] removeObserver:self];}- (void)applicationWillResignActive:(UIApplication *)application{    // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.    // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.}- (void)applicationDidEnterBackground:(UIApplication *)application{    // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.     // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.}- (void)applicationWillEnterForeground:(UIApplication *)application{    // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.}- (void)applicationDidBecomeActive:(UIApplication *)application{    // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.}- (void)applicationWillTerminate:(UIApplication *)application{    // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.}

在要用的地方：

- (void)viewDidLoad{    [super viewDidLoad];    UIButton *btn = [UIButton buttonWithType:UIButtonTypeContactAdd];    btn.center = CGPointMake(100, 200);    [btn addTarget:self action:@selector(btnClick) forControlEvents:UIControlEventTouchUpInside];    [self.view addSubview:btn];}-(void)btnClick{    AppDelegate *appDlg = (AppDelegate *)[[UIApplication sharedApplication] delegate];    NSParameterAssert([appDlg.reach isKindOfClass: [Reachability class]]);    NetworkStatus status = [appDlg.reach currentReachabilityStatus];        if (status == NotReachable) {//        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:nil message:@"網路已斷開" delegate:nil cancelButtonTitle:@"確定" otherButtonTitles:nil];//        [alertView show];        NSLog(@"----Notification Says Unreachable");    }else if(status == ReachableViaWWAN){//        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:nil message:@"移動網路" delegate:nil cancelButtonTitle:@"確定" otherButtonTitles:nil];//        [alertView show];        NSLog(@"----Notification Says mobilenet");    }else if(status == ReachableViaWiFi){//        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:nil message:@"WIfi網路" delegate:nil cancelButtonTitle:@"確定" otherButtonTitles:nil];//        [alertView show];        NSLog(@"----Notification Says wifinet");    }}

說明：

這裡只能判斷網路類型的改變，如果連入ChinaNet，，也會顯示為wifi可用的。。如何真正判斷網路是否可用，暫時不知。

Reachability用於在任何地方判斷網路是否可用