iPhoneX获取网络类型方法的变化

KVC

项目中开始是使用KVC获取StatusBar的属性，从而得到当前网络类型方法如下

- (NSString *)getNetStatus {
    
    NSArray *children = [[[[UIApplication sharedApplication] valueForKeyPath:@"statusBar"] valueForKeyPath:@"foregroundView"] subviews];
    NSString *state = nil;
    int netType = 0;

    for (id child in children) {
        
        if ([child isKindOfClass:NSClassFromString(@"UIStatusBarDataNetworkItemView")]) {

            netType = [[child valueForKeyPath:@"dataNetworkType"] intValue];
            
            switch (netType) {
                case 0:
                    state = @"无网络";
                    break;
                case 1:
                    state =  @"2G";
                    break;
                case 2:
                    state =  @"3G";
                    break;
                case 3:
                    state =   @"4G";
                    break;
                case 5:
                    state =  @"WIFI";
                    break;
                default:
                    state =  @"未知网络";
                    break;
            }
        }
    }
    return state;
}

但是在iPhone X设备上以上方法失效并引发崩溃，所以我们尝试重新遍历StatusBar的属性

//obj 即为被遍历对象
unsigned int outCount = 0;
Ivar *ivars = class_copyIvarList([obj class], &outCount);
    
for (int i = 0; i < outCount; i++) {
    
    Ivar ivar = ivars[i];
    printf("======== |%s\n", ivar_getName(ivar));
}

之后获取到以下Path，发现类似dataNetworkType的_networkTypeView

NSArray *items = [[[[UIApplication sharedApplication] valueForKeyPath:@"statusBar"] valueForKeyPath:@"statusBar"] items];
id obj = [[items valueForKeyPath:@"_UIStatusBarCellularExpandedItem"] valueForKeyPath:@"_networkTypeView"];

但纵览整个属性列表，没有发现可用的NetworkType，只能弃用

Reachability

通过翻阅文档发现可以通过CTTelephonyNetworkInfo获取网络运营商相关信息，这不就是3G，4G技术名称嘛！！！

CORETELEPHONY_EXTERN NSString * const CTRadioAccessTechnologyGPRS          __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_7_0);
CORETELEPHONY_EXTERN NSString * const CTRadioAccessTechnologyEdge          __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_7_0);
CORETELEPHONY_EXTERN NSString * const CTRadioAccessTechnologyWCDMA         __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_7_0);
CORETELEPHONY_EXTERN NSString * const CTRadioAccessTechnologyHSDPA         __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_7_0);
CORETELEPHONY_EXTERN NSString * const CTRadioAccessTechnologyHSUPA         __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_7_0);
CORETELEPHONY_EXTERN NSString * const CTRadioAccessTechnologyCDMA1x        __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_7_0);
CORETELEPHONY_EXTERN NSString * const CTRadioAccessTechnologyCDMAEVDORev0  __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_7_0);
CORETELEPHONY_EXTERN NSString * const CTRadioAccessTechnologyCDMAEVDORevA  __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_7_0);
CORETELEPHONY_EXTERN NSString * const CTRadioAccessTechnologyCDMAEVDORevB  __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_7_0);
CORETELEPHONY_EXTERN NSString * const CTRadioAccessTechnologyeHRPD         __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_7_0);
CORETELEPHONY_EXTERN NSString * const CTRadioAccessTechnologyLTE           __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_7_0);

之后再次发现Reachability中已对此做了相应封装，拿来即用，美滋滋。戳这儿下载

typedef enum : NSInteger {
    NotReachable = 0,
    ReachableViaWiFi,
    kReachableVia2G,
    kReachableVia3G,
    kReachableVia4G
} NetworkStatus;

PS:最新版Reachability已简化枚举

typedef enum : NSInteger {
    NotReachable = 0,
    ReachableViaWiFi,
    ReachableViaWWAN
} NetworkStatus;

经过改写后的方法如下

+ (int)getNetStatus {
    
    NSString *stateString = nil;
    int netStatusNumber = 0;

    switch ([[Reachability reachabilityForInternetConnection] currentReachabilityStatus]) {
            
        case NotReachable: {
            
            stateString = @"无网络";
            netStatusNumber = 0;
        }
            break;
        case kReachableVia2G: {
            
            stateString = @"2G";
            netStatusNumber = 2;
        }
            break;
        case kReachableVia3G: {
         
            stateString = @"3G";
            netStatusNumber = 3;
        }
            break;
        case kReachableVia4G: {
            
            stateString = @"4G";
            netStatusNumber = 4;
        }
            break;
        case ReachableViaWiFi: {
            
            stateString = @"WIFI";
            netStatusNumber = 1;
        }
            break;
        default: {
            
            stateString = @"不可识别的网络";
            netStatusNumber = -1;
        }
            break;
    }
    return netStatusNumber;
}