文章目錄

• 判斷程式碼
• CFNetDiagnosticStatus 列舉

判斷程式碼

- (BOOL)checkReachability{

  CFNetDiagnosticRef dReference;
  dReference = CFNetDiagnosticCreateWithURL (NULL, (__bridge CFURLRef)[NSURL URLWithString:@"https://www.baidu.com"]);

  CFNetDiagnosticStatus status;
  status = CFNetDiagnosticCopyNetworkStatusPassively (dReference, NULL);

  CFRelease (dReference);

  if ( status == kCFNetDiagnosticConnectionUp ){
  NSLog(@"連線正常");
  return YES;
  }else{
  NSLog(@"連線失敗");
  return NO;
  }
}
 

CFNetDiagnosticStatus 列舉

typedef CF_ENUM(int, CFNetDiagnosticStatusValues) {

  /*
  * There is no status, but no error has occured
  */
  kCFNetDiagnosticNoErr = 0,  //沒有狀態返回，也沒有報錯

  /*
  * An error occured that prevented the call from completing
  */
  kCFNetDiagnosticErr = -66560L,  //發生問題

  /*
  * The connection appears to be working
  */
  kCFNetDiagnosticConnectionUp = -66559L, //連線正常
  kCFNetDiagnosticConnectionIndeterminate = -66558L,  //不確定的

  /*
  * The connection does not appear to be working
  */
  kCFNetDiagnosticConnectionDown = -66557L  //連線失敗

} CF_DEPRECATED(10_4, 10_13, 2_0, 11_0);