Reachability類只能區分WIFI和WWAN類型,卻無法區分2G網和3G網。
網上也有些方法,卻都存在Bug。
經過網上查找資料和測試,基本上總結了以下幾種方法:
1、使用導航欄的方式:(私有API)
代碼:
復制代碼 代碼如下:
typedef enum {
NetWorkType_None = 0,
NetWorkType_WIFI,
NetWorkType_2G,
NetWorkType_3G,
} NetWorkType;
UIApplication *application = [UIApplication sharedApplication]; NSArray *subviews = [[[application valueForKey:@"statusBar"] valueForKey:@"foregroundView"]subviews]; NSNumber *dataNetWorkItemView = nil; for (id subView in subviews) { if ([subView isKindOfClass:[NSClassFromString(@"UIStatusBarDataNetworkItemView") class]]) { dataNetWorkItemView = subView; break; } } NetWorkType networkType = NetWorkType_None; switch ([[dataNetWorkItemView valueForKey:@"dataNetworkType"] integerValue]) { case 0: NSLog(@"No wifi or cellular"); networkType = NetWorkType_None; break; case 1: NSLog(@"2G"); networkType = NetWorkType_2G; break; case 2: NSLog(@"3G"); networkType = NetWorkType_3G; break; default: NSLog(@"Wifi"); networkType = NetWorkType_WIFI; break; } return networkType;
使用這種方法要確保導航欄沒有被隱藏,如果導航欄被隱藏則取不到值。另外,該方法存在Bug,通過Reachability類,在網絡類型發生改變時,再執行該代碼,獲取的網絡類型數據沒有更新。如果程序進入後台再轉到前台,重新執行該代碼時,便可以重新獲取最新的網絡類型數據。這樣用戶體驗不好,當用戶在移動中,網絡類型發生改變,無法獲取最新的網絡類型,則頁面數據無法更新。(PS:如果哪位大神知道,有什麼方法可以刷新數據值,望不吝賜教,感謝!)
2、通過SCNetworkReachability類
代碼:
struct sockaddr_in zeroAddress; bzero(&zeroAddress, sizeof(zeroAddress)); zeroAddress.sin_len = sizeof(zeroAddress); zeroAddress.sin_family = AF_INET; SCNetworkReachabilityRef defaultRouteReachability = SCNetworkReachabilityCreateWithAddress(NULL, (struct sockaddr *)&zeroAddress); //創建測試連接的引用: SCNetworkReachabilityFlags flags; SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags); if ((flags & kSCNetworkReachabilityFlagsReachable) == 0) { return NetWorkType_None; } NetWorkType retVal = NetWorkType_None; if ((flags & kSCNetworkReachabilityFlagsConnectionRequired) == 0) { retVal = NetWorkType_WIFI; } if ((((flags & kSCNetworkReachabilityFlagsConnectionOnDemand ) != 0) || (flags & kSCNetworkReachabilityFlagsConnectionOnTraffic) != 0)) { if ((flags & kSCNetworkReachabilityFlagsInterventionRequired) == 0) { retVal = NetWorkType_WIFI; } } if ((flags & kSCNetworkReachabilityFlagsIsWWAN) == kSCNetworkReachabilityFlagsIsWWAN) { if((flags & kSCNetworkReachabilityFlagsReachable) == kSCNetworkReachabilityFlagsReachable) { if ((flags & kSCNetworkReachabilityFlagsTransientConnection) == kSCNetworkReachabilityFlagsTransientConnection) { retVal = NetWorkType_3G; if((flags & kSCNetworkReachabilityFlagsConnectionRequired) == kSCNetworkReachabilityFlagsConnectionRequired) { retVal = NetWorkType_2G; } } } } return retVal;
這種方法跟Reachability的方法相同,也無法區分2G網和3g網,但是網上有人測試可以區分,如果有人知道原因,希望指正,謝謝!
3、使用SoftwareUpdateService.framework(私有API)
准備工作:
導出生成私有API的頭文件聲明
使用私有或未公開的API,首先需要導出其對應的頭文件,在頭文件裡有相關函數的聲明。
工具:
class-dump
class-dump可以從編譯後的Objective-C的二進制文件中提取對應的數據結構及函數等聲明。
使用方法:
為了能在任意目錄下使用class-dump命令,首先建議把class-dump文件拷貝到/user/local/bin/目錄下,然後就可以在任意目錄下執行以下命令:
class-dump /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.0.sdk/System/Library/Frameworks/SoftwareUpdateServices.framework/ >SUKit.h
但是bulidsetting 設置framework的search path 時要設置真實的私有庫路徑,因為我們要用它的可執行文件,只有頭文件是不行的。
代碼:
NSBundle *b = [NSBundle bundleWithPath:@"/System/Library/PrivateFrameworks/SoftwareUpdateServices.framework"]; if ([b load]) { // load Class from STRING SUNetworkMonitor *networkMonitor = [SUNetworkMonitor sharedInstance]; int netType = [networkMonitor currentNetworkType]; NetWorkType networkType = NetWorkType_None; switch ( netType ) { case 0: NSLog(@"No wifi or cellular"); networkType = NetWorkType_None; break; case 1: NSLog(@"WIFI"); networkType = NetWorkType_WIFI; break; case 2: NSLog(@"2G"); networkType = NetWorkType_2G; break; case 3: NSLog(@"3G"); networkType = NetWorkType_3G; break; default: break; }<br> return networkType; } return NetWorkType_None;
這種方法可以獲取網絡類型,並且在網絡類型改變時,獲取最新的網絡類型。目前還沒有發現Bug,只是准備階段的工作比較麻煩。
4、最後一種方法,就是利用IOS7系統自帶的API獲取。只是,IOS7以下的系統版本需要上述的方法獲取網絡類型。
以上所述就是本文的全部內容了,希望大家能夠喜歡。