iOS开发之获取WIFI信号强度

虽然各种直接获取信号强度的api都被封杀了。但是还有一个另类的黑魔法可以获取到。那就是遍历UIStatusBar了

- (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);
}

当然我们还可以遍历UIStatusBar 获取到网络连接类型

- (void)getNetworkType
{
    UIApplication *app = [UIApplication sharedApplication];
    NSArray *subviews = [[[app valueForKeyPath:@"statusBar"] valueForKeyPath:@"foregroundView"] subviews];
    for (id subview in subviews) {
        if ([subview isKindOfClass:NSClassFromString(@"UIStatusBarDataNetworkItemView")]) {
            int networkType = [[subview valueForKeyPath:@"dataNetworkType"] intValue];
            switch (networkType) {
                case 0:
                    NSLog(@"NONE");
                    break;
                case 1:
                    NSLog(@"2G");
                    break;
                case 2:
                    NSLog(@"3G");
                    break;
                case 3:
                    NSLog(@"4G");
                    break;
                case 5:
                {
                    NSLog(@"WIFI");
                }
                    break;
                default:
                    break;
            }
        }
    }
}