[iOS] - 获取WIFI信号强度

之前获取信号强度的API都不能用了,最近看到一个黑魔法，遍历UIStatusBar获取。

- (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);
}

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;
            }
        }
    }
}