如何使用可達性來查找iPhone設備是否已連接到3G / Wifi

Question

誰能讓我知道是否使用Reachability連接到3G / Wifi的iPhone設備。請給我一些此iPhone開發中的示例/ URL的.im。

提前致謝

Answer 1

您可以嘗試從Apple http://developer.apple.com/iphone/library/samplecode/Reachability/的Rechability示例開始

Answer 2

首先將SystemConfiguration.framework添加到您的項目中

//Class.h
#import "Reachability.h"
#import <SystemConfiguration/SystemConfiguration.h>

- (BOOL)connected;

//Class.m

- (BOOL)connected
{
    Reachability *reachability = [Reachability reachabilityForInternetConnection];
    NetworkStatus networkStatus = [reachability currentReachabilityStatus];
    return networkStatus != NotReachable;
}
Then, I use this whenever I want to see if I have a connection:

if (![self connected]) {
    // Not connected
} else {
    // Connected. Do some Internet stuff
}