iOS: 手机是否设置网络代理

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情景

项目开发过程中, 会遇到下面这样一种情景:

产品或者设计同事需要体验目前产品开发的进度, 然后要求开发人员, 将现在的版本给他们体验.
做过程序开发的人都知道, 开发版本会有不少问题.
这时, 产品和设计同事就会抱怨, 怎么登录不了, 这里没有数据了!
有个小伙伴被折腾的实在受不了, 连网页都打不开了.
最后找到原因:
他手机被之前的程序猿设置了网络代理, 代理到程序猿哥哥的电脑上来抓包调试问题, 忘记取消设置了.

假如可以判断当前手机是否设置了网络代理, 就可以很好地解决上面情景中提到的问题了.

找到线索

在 ASIHttpRequest 中找到如下方法:

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- (BOOL)configureProxies
{
	// Have details of the proxy been set on this request
	if (![self isPACFileRequest] && (![self proxyHost] && ![self proxyPort])) {
		// If not, we need to figure out what they'll be
		NSArray *proxies = nil;
		// Have we been given a proxy auto config file?
		if ([self PACurl]) {
			// If yes, we'll need to fetch the PAC file asynchronously, so we stop this request to wait until we have the proxy details.
			[self fetchPACFile];
			return NO;
			// Detect proxy settings and apply them
		} else {
#if TARGET_OS_IPHONE
			NSDictionary *proxySettings = [NSMakeCollectable(CFNetworkCopySystemProxySettings()) autorelease];
#else
			NSDictionary *proxySettings = [NSMakeCollectable(SCDynamicStoreCopyProxies(NULL)) autorelease];
#endif
			proxies = [NSMakeCollectable(CFNetworkCopyProxiesForURL((CFURLRef)[self url], (CFDictionaryRef)proxySettings)) autorelease];
			// Now check to see if the proxy settings contained a PAC url, we need to run the script to get the real list of proxies if so
			NSDictionary *settings = [proxies objectAtIndex:0];
			if ([settings objectForKey:(NSString *)kCFProxyAutoConfigurationURLKey]) {
				[self setPACurl:[settings objectForKey:(NSString *)kCFProxyAutoConfigurationURLKey]];
				[self fetchPACFile];
				return NO;
			}
		}
		if (!proxies) {
			[self setReadStream:nil];
			[self failWithError:[NSError errorWithDomain:NetworkRequestErrorDomain code:ASIInternalErrorWhileBuildingRequestType userInfo:[NSDictionary dictionaryWithObjectsAndKeys:@"Unable to obtain information on proxy servers needed for request",NSLocalizedDescriptionKey,nil]]];
			return NO;
		}
		// I don't really understand why the dictionary returned by CFNetworkCopyProxiesForURL uses different key names from CFNetworkCopySystemProxySettings/SCDynamicStoreCopyProxies
		// and why its key names are documented while those we actually need to use don't seem to be (passing the kCF* keys doesn't seem to work)
		if ([proxies count] > 0) {
			NSDictionary *settings = [proxies objectAtIndex:0];
			[self setProxyHost:[settings objectForKey:(NSString *)kCFProxyHostNameKey]];
			[self setProxyPort:[[settings objectForKey:(NSString *)kCFProxyPortNumberKey] intValue]];
			[self setProxyType:[settings objectForKey:(NSString *)kCFProxyTypeKey]];
		}
	}
	return YES;
}

踏破铁鞋无觅处…

判断 iphone 是否设置网络代理的示例代码如下:

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+ (BOOL)hasSetProxy
{
    BOOL proxy = NO;
    
    NSDictionary *proxySettings = (__bridge NSDictionary *)(CFNetworkCopySystemProxySettings());
    NSURL *url = [NSURL URLWithString:@"http://www.baidu.com"];
    NSArray *proxies = (__bridge NSArray *)(CFNetworkCopyProxiesForURL((__bridge CFURLRef)(url),
                                                                       (__bridge CFDictionaryRef)(proxySettings)));
    MZLOG(@"proxies:%@", proxies);
    NSDictionary *settings = proxies[0];
    MZLOG(@"kCFProxyHostNameKey: %@", [settings objectForKey:(NSString *)kCFProxyHostNameKey]);
    MZLOG(@"kCFProxyPortNumberKey: %@", [settings objectForKey:(NSString *)kCFProxyPortNumberKey]);
    MZLOG(@"kCFProxyTypeKey: %@", [settings objectForKey:(NSString *)kCFProxyTypeKey]);
    if ([[settings objectForKey:(NSString *)kCFProxyTypeKey] isEqualToString:@"kCFProxyTypeNone"]) {
        proxy = NO;
    }
    else {
        proxy = YES;
    }
    
    return proxy;
}

用户体验

判断如果设置了代理, 提示用户, 帮他直接跳到 wifi 设置界面.

下面说说如何跳到系统的 wifi 设置界面.

1.配置 URL TYPES

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注意这里的配置是 prefs.

2.openURL

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NSString * urlString = @"prefs:root=WIFI";
NSURL *url = [NSURL URLWithString:urlString];
UIApplication *app = [UIApplication sharedApplication];
if ([app canOpenURL:[NSURL URLWithString:urlString]]) {
 
    if ([[UIDevice currentDevice].systemVersion doubleValue] >= 10.0) {
    
    	[app openURL:url options:@{} completionHandler:nil];
    } 
    else {
    
    	[app openURL:url];
    }
}

另外, 跳转到系统其他界面的 URL 如下:

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1.系统设置
prefs:root=INTERNET_TETHERING
2.WIFI设置
prefs:root=WIFI
3.蓝牙设置
prefs:root=Bluetooth
4.系统通知
prefs:root=NOTIFICATIONS_ID
5.通用设置
prefs:root=General
6.显示设置
prefs:root=DISPLAY&BRIGHTNESS
7.壁纸设置
prefs:root=Wallpaper
8.声音设置
prefs:root=Sounds
9.隐私设置
prefs:root=privacy
10.打开 APP Store
prefs:root=STORE
11.打开 Notes
prefs:root=NOTES
12.打开 Safari
prefs:root=Safari
13.打开 Music
prefs:root=MUSIC
14.打开 photo
prefs:root=Photos