ios 13获取信号强度

iOS 13以上系统获取信号强度

该方式获取到的值是信号格数，并不是具体的信号值。如果需求只是来分析信号质量，可以采取这样的方法。具体的值目前还在研究中。  苹果真的是越来越防着我们知道具体的信号强度了。 难道以为我们不知道值就不知道他信号差了吗？（狗头）

 if(@available(iOS13.0, *)) {

        NSArray *arr = [UIApplication sharedApplication].connectedScenes.allObjects;

        UIWindowScene*scene = arr.firstObject;

        UIStatusBarManager*statusBarManager = scene.statusBarManager;

        id statusBar =nil;

        if([statusBarManagerrespondsToSelector:@selector(createLocalStatusBar)]) {

            UIView*localStatusBar = [statusBarManagerperformSelector:@selector(createLocalStatusBar)];

            if([localStatusBarrespondsToSelector:@selector(statusBar)]) {

                statusBar = [localStatusBarperformSelector:@selector(statusBar)];

            }

        }

        if(statusBar) {

            idcurrentData = [[statusBarvalueForKeyPath:@"_statusBar"]valueForKeyPath:@"currentData"];

            idcellularEntry = [currentDatavalueForKeyPath:@"cellularEntry"];           if([cellularEntryisKindOfClass:NSClassFromString(@"_UIStatusBarDataIntegerEntry")]) {

                signalStrength = [[cellularEntryvalueForKey:@"displayValue"]intValue];

            }

        }

    }

iOS13以下系统获取信号强度

    UIApplication *app = [UIApplication sharedApplication];

    NSArray*subviews = [[[appvalueForKey:@"statusBar"]valueForKey:@"foregroundView"]subviews];

    NSString*dataNetworkItemView =nil;

    for(idsubviewinsubviews) {

        if([subview isKindOfClass:[NSClassFromString(@"UIStatusBarSignalStrengthItemView") class]])

        {

            dataNetworkItemView = subview;

            break;

        }

    }

    NSIntegersignalStrength = [[dataNetworkItemViewvalueForKey:@"signalStrengthRaw"]intValue];

    NSString*signalStrengthStr = [NSStringstringWithFormat:@"%lddBm",(long)signalStrength];