聯網權限
引入頭文件 @import CoreTelephony;
應用啟動后，檢測應用中是否有聯網權限
CTCellularData *cellularData = [[CTCellularData alloc]init];
cellularData.cellularDataRestrictionDidUpdateNotifier = ^(CTCellularDataRestrictedState state)
{ //獲取聯網狀態 switch (state) { case kCTCellularDataRestricted: NSLog(@"Restricrted"); break;
case kCTCellularDataNotRestricted: NSLog(@"Not Restricted"); break; case kCTCellularDataRestrictedStateUnknown: NSLog(@"Unknown"); break; default: break;
};};

查詢應用是否有聯網功能
CTCellularData *cellularData = [[CTCellularData alloc]init];
CTCellularDataRestrictedState state = cellularData.restrictedState; switch (state)
{ case kCTCellularDataRestricted: NSLog(@"kCT蜂窩數據限制"); break;
case kCTCellularDataNotRestricted: NSLog(@"kCT蜂窩數據不受限制的");break;
case kCTCellularDataRestrictedStateUnknown: NSLog(@"kCT蜂窩數據限制狀態未知"); break;
default: break;
}