读取iOS代理设置的代码

转自: http://www.cocoachina.com/iphonedev/toolthain/2011/1118/3538.html
用过ASIHTTPRequest这个开源网络库，它可以读取代理设置，于是我在源码中发现读取代理设置的方法，我已把代码提取出来：

NSDictionary *proxySettings = NSMakeCollectable([(NSDictionary *)CFNetworkCopySystemProxySettings() autorelease]);

NSArray *proxies = NSMakeCollectable([(NSArray *)CFNetworkCopyProxiesForURL((CFURLRef)[NSURL URLWithString:@"http://www.google.com"], (CFDictionaryRef)proxySettings) autorelease]);

NSDictionary *settings = [proxies objectAtIndex:0];

NSLog(@"host=%@", [settings objectForKey:(NSString *)kCFProxyHostNameKey]);

NSLog(@"port=%@", [settings objectForKey:(NSString *)kCFProxyPortNumberKey]);

NSLog(@"type=%@", [settings objectForKey:(NSString *)kCFProxyTypeKey]);

需要CFNetwork.framework