IOS网络监控 Reachability

(1)定义网络监测实体

#import "Reachability.h"
// Add this to the interface in the .m file of your view controller
@interface MyViewController (){
    Reachability *internetReachableFoo;
}
@end

(2)具体调用在视图控制层.m文件实现
// Checks if we have an internet connection or not
- (void)testInternetConnection{   
    internetReachableFoo = [Reachability reachabilityWithHostname:@"www.google.com"];
// Internet is reachable
   internetReachableFoo.reachableBlock = ^(Reachability*reach) {
       // Update the UI on the main thread
       dispatch_async(dispatch_get_main_queue(), ^{
            NSLog(@"Yayyy, we have the interwebs!");
       });
    };

    // Internet is not reachable
    internetReachableFoo.unreachableBlock = ^(Reachability*reach)
    {
        // Update the UI on the main thread
        dispatch_async(dispatch_get_main_queue(), ^{
            NSLog(@"Someone broke the internet :(");
        });
    };
    [internetReachableFoo startNotifier];
}
 

Demo: https://github.com/tonymillion/Reachability