IOS开发中如何检测网络连接

1)将**SystemConfiguration**framework添加到项目中。

2)添加Reachability.h和**Reachability.m**githubhttps://github.com/tonymillion/Reachability

3)实现方法

#import "Reachability.h"

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

实现方法

// 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];
}

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