iOS 代理检测

NSDictionary *proxySettings = CFBridgingRelease(CFNetworkCopySystemProxySettings());
    NSArray *proxies = CFBridgingRelease(CFNetworkCopyProxiesForURL((__bridge CFURLRef)[NSURL URLWithString:@"https://www.baidu.com"], (__bridge CFDictionaryRef)proxySettings));
    if (proxies.count > 0) {
        NSDictionary *settings = proxies[0];
        NSString *type = [settings objectForKey:(NSString *)kCFProxyTypeKey];
        if (![type isEqualToString:(NSString *)kCFProxyTypeNone]) {
            NSLog(@"========== 开启代理");
            return;
        }
    }
    NSLog(@"========== 未开启代理");