前言

小編最近在項目中遇到了一個問題，除劉海屏以外的iOS設備可以正常的搜索到硬件設備，但是劉海屏就不行。因此，小編花了一點時間研究了一下iOS設備獲取當前設備的網絡狀態。

實現

因為iOS的系統是封閉的，所以是沒有直接的APi去獲取當前的網絡狀態。但是道高一尺，魔高一尺。開發者總會有辦法獲取自己想要的東西。

1.網絡狀態獲取

獲取當前的網絡類型

獲取當前的網絡類型是通過獲取狀態欄，然后遍歷狀態欄的視圖完成的。
先導入頭文件，如下：

#import "AppDelegate.h"

實現方法如下：

+ (NSString *)getNetworkType
{
    UIApplication *app = [UIApplication sharedApplication];
    id statusBar = nil;
//    判斷是否是iOS 13
    NSString *network = @"";
    if (@available(iOS 13.0, *)) {
        UIStatusBarManager *statusBarManager = [UIApplication sharedApplication].keyWindow.windowScene.statusBarManager;
        
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wundeclared-selector"
        if ([statusBarManager respondsToSelector:@selector(createLocalStatusBar)]) {
            UIView *localStatusBar = [statusBarManager performSelector:@selector(createLocalStatusBar)];
            if ([localStatusBar respondsToSelector:@selector(statusBar)]) {
                statusBar = [localStatusBar performSelector:@selector(statusBar)];
            }
        }
#pragma clang diagnostic pop
        
        if (statusBar) {
//            UIStatusBarDataCellularEntry
            id currentData = [[statusBar valueForKeyPath:@"_statusBar"] valueForKeyPath:@"currentData"];
            id _wifiEntry = [currentData valueForKeyPath:@"wifiEntry"];
            id _cellularEntry = [currentData valueForKeyPath:@"cellularEntry"];
            if (_wifiEntry && [[_wifiEntry valueForKeyPath:@"isEnabled"] boolValue]) {
//                If wifiEntry is enabled, is WiFi.
                network = @"WIFI";
            } else if (_cellularEntry && [[_cellularEntry valueForKeyPath:@"isEnabled"] boolValue]) {
                NSNumber *type = [_cellularEntry valueForKeyPath:@"type"];
                if (type) {
                    switch (type.integerValue) {
                        case 0:
//                            無sim卡
                            network = @"NONE";
                            break;
                        case 1:
                            network = @"1G";
                            break;
                        case 4:
                            network = @"3G";
                            break;
                        case 5:
                            network = @"4G";
                            break;
                        default:
//                            默認WWAN類型
                            network = @"WWAN";
                            break;
                            }
                        }
                    }
                }
    }else {
        statusBar = [app valueForKeyPath:@"statusBar"];
        
        if ([[[self alloc]init]isLiuHaiScreen]) {
//            劉海屏
                id statusBarView = [statusBar valueForKeyPath:@"statusBar"];
                UIView *foregroundView = [statusBarView valueForKeyPath:@"foregroundView"];
                NSArray *subviews = [[foregroundView subviews][2] subviews];
                
                if (subviews.count == 0) {
//                    iOS 12
                    id currentData = [statusBarView valueForKeyPath:@"currentData"];
                    id wifiEntry = [currentData valueForKey:@"wifiEntry"];
                    if ([[wifiEntry valueForKey:@"_enabled"] boolValue]) {
                        network = @"WIFI";
                    }else {
//                    卡1:
                        id cellularEntry = [currentData valueForKey:@"cellularEntry"];
//                    卡2:
                        id secondaryCellularEntry = [currentData valueForKey:@"secondaryCellularEntry"];

                        if (([[cellularEntry valueForKey:@"_enabled"] boolValue]|[[secondaryCellularEntry valueForKey:@"_enabled"] boolValue]) == NO) {
//                            無卡情況
                            network = @"NONE";
                        }else {
//                            判斷卡1還是卡2
                            BOOL isCardOne = [[cellularEntry valueForKey:@"_enabled"] boolValue];
                            int networkType = isCardOne ? [[cellularEntry valueForKey:@"type"] intValue] : [[secondaryCellularEntry valueForKey:@"type"] intValue];
                            switch (networkType) {
                                    case 0://無服務
                                    network = [NSString stringWithFormat:@"%@-%@", isCardOne ? @"Card 1" : @"Card 2", @"NONE"];
                                    break;
                                    case 3:
                                    network = [NSString stringWithFormat:@"%@-%@", isCardOne ? @"Card 1" : @"Card 2", @"2G/E"];
                                    break;
                                    case 4:
                                    network = [NSString stringWithFormat:@"%@-%@", isCardOne ? @"Card 1" : @"Card 2", @"3G"];
                                    break;
                                    case 5:
                                    network = [NSString stringWithFormat:@"%@-%@", isCardOne ? @"Card 1" : @"Card 2", @"4G"];
                                    break;
                                default:
                                    break;
                            }
                            
                        }
                    }
                
                }else {
                    
                    for (id subview in subviews) {
                        if ([subview isKindOfClass:NSClassFromString(@"_UIStatusBarWifiSignalView")]) {
                            network = @"WIFI";
                        }else if ([subview isKindOfClass:NSClassFromString(@"_UIStatusBarStringView")]) {
                            network = [subview valueForKeyPath:@"originalText"];
                        }
                    }
                }
                
            }else {
//                非劉海屏
                UIView *foregroundView = [statusBar valueForKeyPath:@"foregroundView"];
                NSArray *subviews = [foregroundView subviews];
                
                for (id subview in subviews) {
                    if ([subview isKindOfClass:NSClassFromString(@"UIStatusBarDataNetworkItemView")]) {
                        int networkType = [[subview valueForKeyPath:@"dataNetworkType"] intValue];
                        switch (networkType) {
                            case 0:
                                network = @"NONE";
                                break;
                            case 1:
                                network = @"2G";
                                break;
                            case 2:
                                network = @"3G";
                                break;
                            case 3:
                                network = @"4G";
                                break;
                            case 5:
                                network = @"WIFI";
                                break;
                            default:
                                break;
                        }
                    }
                }
            }
    }

    if ([network isEqualToString:@""]) {
        network = @"NO DISPLAY";
    }
    return network;
}

獲取當前的Wifi信息

獲取當前的Wifi信息需要借助系統的SystemConfiguration這個庫。
先導入頭文件，如下：

#import <SystemConfiguration/CaptiveNetwork.h>

實現方法如下：

#pragma mark 獲取Wifi信息
+ (id)fetchSSIDInfo
{
    NSArray *ifs = (__bridge_transfer id)CNCopySupportedInterfaces();
    id info = nil;
    for (NSString *ifnam in ifs) {
        info = (__bridge_transfer id)CNCopyCurrentNetworkInfo((__bridge CFStringRef)ifnam);
        
        if (info && [info count]) {
            break;
        }
    }
    return info;
}
#pragma mark 獲取WIFI名字
+ (NSString *)getWifiSSID
{
    return (NSString *)[self fetchSSIDInfo][@"SSID"];
}
#pragma mark 獲取WIFI的MAC地址
+ (NSString *)getWifiBSSID
{
    return (NSString *)[self fetchSSIDInfo][@"BSSID"];
}

獲取當前的Wifi信號強度

獲取信號強度與獲取網絡狀態有點類似，通過遍歷狀態欄，從而獲取WIFI圖標的信號強度。在獲取前需注意當前狀態是否為WIFI。如下：

+ (int)getWifiSignalStrength{
    
    int signalStrength = 0;
//    判斷類型是否為WIFI
    if ([[self getNetworkType]isEqualToString:@"WIFI"]) {
//        判斷是否為iOS 13
        if (@available(iOS 13.0, *)) {
            UIStatusBarManager *statusBarManager = [UIApplication sharedApplication].keyWindow.windowScene.statusBarManager;
             
            id statusBar = nil;
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wundeclared-selector"
            if ([statusBarManager respondsToSelector:@selector(createLocalStatusBar)]) {
                UIView *localStatusBar = [statusBarManager performSelector:@selector(createLocalStatusBar)];
                if ([localStatusBar respondsToSelector:@selector(statusBar)]) {
                    statusBar = [localStatusBar performSelector:@selector(statusBar)];
                }
            }
#pragma clang diagnostic pop
            if (statusBar) {
                id currentData = [[statusBar valueForKeyPath:@"_statusBar"] valueForKeyPath:@"currentData"];
                id wifiEntry = [currentData valueForKeyPath:@"wifiEntry"];
                if ([wifiEntry isKindOfClass:NSClassFromString(@"_UIStatusBarDataIntegerEntry")]) {
//                    層級：_UIStatusBarDataNetworkEntry、_UIStatusBarDataIntegerEntry、_UIStatusBarDataEntry
                    
                    signalStrength = [[wifiEntry valueForKey:@"displayValue"] intValue];
                }
            }
        }else {
            UIApplication *app = [UIApplication sharedApplication];
            id statusBar = [app valueForKey:@"statusBar"];
            if ([[[self alloc]init]isLiuHaiScreen]) {
//                劉海屏
                id statusBarView = [statusBar valueForKeyPath:@"statusBar"];
                UIView *foregroundView = [statusBarView valueForKeyPath:@"foregroundView"];
                NSArray *subviews = [[foregroundView subviews][2] subviews];
                       
                if (subviews.count == 0) {
//                    iOS 12
                    id currentData = [statusBarView valueForKeyPath:@"currentData"];
                    id wifiEntry = [currentData valueForKey:@"wifiEntry"];
                    signalStrength = [[wifiEntry valueForKey:@"displayValue"] intValue];
//                    dBm
//                    int rawValue = [[wifiEntry valueForKey:@"rawValue"] intValue];
                }else {
                    for (id subview in subviews) {
                        if ([subview isKindOfClass:NSClassFromString(@"_UIStatusBarWifiSignalView")]) {
                            signalStrength = [[subview valueForKey:@"_numberOfActiveBars"] intValue];
                        }
                    }
                }
            }else {
//                非劉海屏
                UIView *foregroundView = [statusBar valueForKey:@"foregroundView"];
                     
                NSArray *subviews = [foregroundView subviews];
                NSString *dataNetworkItemView = nil;
                       
                for (id subview in subviews) {
                    if([subview isKindOfClass:[NSClassFromString(@"UIStatusBarDataNetworkItemView") class]]) {
                        dataNetworkItemView = subview;
                        break;
                    }
                }
                       
                signalStrength = [[dataNetworkItemView valueForKey:@"_wifiStrengthBars"] intValue];
                        
                return signalStrength;
            }
        }
    }
    return signalStrength;
}

2.Reachability的使用

下載開源類Reachability，然后根據文檔使用即可（該類把移動網絡統稱為WWAN）：

+ (NSString *)getNetworkTypeByReachability
{
    NSString *network = @"";
    switch ([[Reachability reachabilityForInternetConnection]currentReachabilityStatus]) {
        case NotReachable:
            network = @"NONE";
            break;
        case ReachableViaWiFi:
            network = @"WIFI";
            break;
        case ReachableViaWWAN:
            network = @"WWAN";
            break;
        default:
            break;
    }
    if ([network isEqualToString:@""]) {
        network = @"NO DISPLAY";
    }
    return network;
}

上次發布了這篇文章之后，有人問我，怎么才能獲取設備的IP地址呢？在這里，小編附上獲取iP地址的方法。
先導入頭文件，如下：

#import <ifaddrs.h>
#import <arpa/inet.h>

實現方法，如下：

#pragma mark 獲取設備IP地址
+ (NSString *)getIPAddress
{
    NSString *address = @"error";
    struct ifaddrs *interfaces = NULL;
    struct ifaddrs *temp_addr = NULL;
    int success = 0;
    // 檢索當前接口,在成功時,返回0
    success = getifaddrs(&interfaces);
    if (success == 0) {
        // 循環鏈表的接口
        temp_addr = interfaces;
        while(temp_addr != NULL) {
//                開熱點時本機的IP地址
                if ([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:@"bridge100"]
                    ) {
                    address = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)];
                }
            if(temp_addr->ifa_addr->sa_family == AF_INET) {
                // 檢查接口是否en0 wifi連接在iPhone上
                if([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:@"en0"]) {
                    // 得到NSString從C字符串
                    address = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)];
                }
            }
            temp_addr = temp_addr->ifa_next;
        }
    }
    // 釋放內存
    freeifaddrs(interfaces);
    return address;
}

3.iOS 12下的補充

在iOS 12下xcode需要打開權限才可以正常操作，如下：

4.iOS 13下的補充

在iOS 13下xcode需要打開權限才可以正常操作，如下：

并且，在iOS 13下，若要獲取SSID和BSSID，需要添加定位權限

#import <CoreLocation/CoreLocation.h>

@interface ViewController ()
@property (strong, nonatomic) CLLocationManager *locationManager;
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    if (@available(iOS 13.0, *)) {
//        如果是iOS13 未開啟地理位置權限 需要提示一下
           if ([CLLocationManager authorizationStatus] == kCLAuthorizationStatusNotDetermined) {
               self.locationManager = [[CLLocationManager alloc] init];
               [self.locationManager requestWhenInUseAuthorization];
           }
       }
}

到這里為止，這篇文章就結束了。在這里提醒一下各位看官，橫屏時請注意不要把狀態欄去掉。有說明不足的地方歡迎評論，這里附上Demo下載地址：Demo。最后，希望這篇文章對各位看官們有所幫助。對支持小編的看官們表示感謝。