最近项目需要检测设备的信号值,旧设备很多方法可用就不一一赘述,只是记录下自己的学习历程,

首先判断设备型号代码如下

 //机型判断
 struct utsname systemInfo;
 uname(&systemInfo);
 NSString * platform = [NSString stringWithCString:systemInfo.machine encoding:NSASCIIStringEncoding];
 UIApplication * appll = [UIApplication sharedApplication];
 id oneOc = [appll valueForKeyPath:@"_statusBar"];
 id twoOc = [oneOc valueForKeyPath:@"_statusBar"];

遍历顶部状态栏,通过断点调试发现x以后顶部状态栏是由以下变化的如图:

找到 _cellularEntry 就好办了

 id twoOc1 = [twoOc valueForKeyPath:@"_currentData"];
 id ocStr = [[twoOc1 valueForKey:@"_cellularEntry"]valueForKeyPath:@"_displayValue"];

至此,获取设备的信号量的值.