iOS中获取wifi新号强度

那就是遍历UIStatusBar，直接上代码

- (void)getSignalStrength{
    UIApplication *app = [UIApplication sharedApplication];
    NSArray *subviews = [[[app valueForKey:@"statusBar"] valueForKey:@"foregroundView"] subviews];
    NSString *dataNetworkItemView = nil;
    
    for (id subview in subviews) {
        if([subview isKindOfClass:[NSClassFromString(@"UIStatusBarDataNetworkItemView") class]]) {
            dataNetworkItemView = subview;
            break;
        }
    }
    
    int signalStrength = [[dataNetworkItemView valueForKey:@"_wifiStrengthBars"] intValue];
    
    NSLog(@"signal %d", signalStrength);
}