Swift获取设备信息

iOS开发中，获取设备信息，用OC语言的比较多，在Swift开发中，可以用OC通过桥接的方式，实现获取设备信息。但是，既然是Swift开发，还是使用纯Swift语言看起来比较顺眼，下面话不多说，直接上代码。

Swift方法：

/// 屏幕宽度
func screenWidth() -> CGFloat {
    return UIScreen.main.bounds.size.width
}

/// 屏幕高度
func screenHeight() -> CGFloat {
    return UIScreen.main.bounds.size.height
}

/// 获取设备版本号
func deviceName() -> String {
    var systemInfo = utsname()
    uname(&systemInfo)
    let machineMirror = Mirror(reflecting: systemInfo.machine)
    let identifier = machineMirror.children.reduce("") { identifier, element in
        guard let value = element.value as? Int8, value != 0 else { return identifier }
        return identifier + String(UnicodeScalar(UInt8(value)))
    }
    switch identifier {
    case "iPod5,1":                                 return "iPod Touch 5"
    case "iPod7,1":                                 return "iPod Touch 6"
    case "iPhone3,1", "iPhone3,2", "iPhone3,3":     return "iPhone 4"
    case "iPhone4,1":                               return "iPhone 4s"
    case "iPhone5,1", "iPhone5,2":                  return "iPhone 5"
    case "iPhone5,3", "iPhone5,4":                  return "iPhone 5c"
    case "iPhone6,1", "iPhone6,2":                  return "iPhone 5s"
    case "iPhone7,2":                               return "iPhone 6"
    case "iPhone7,1":                               return "iPhone 6 Plus"
    case "iPhone8,1":                               return "iPhone 6s"
    case "iPhone8,2":                               return "iPhone 6s Plus"
    case "iPhone9,1":                               return "iPhone 7 (CDMA)"
    case "iPhone9,3":                               return "iPhone 7 (GSM)"
    case "iPhone9,2":                               return "iPhone 7 Plus (CDMA)"
    case "iPhone9,4":                               return "iPhone 7 Plus (GSM)"
        
    case "iPad2,1", "iPad2,2", "iPad2,3", "iPad2,4":return "iPad 2"
    case "iPad3,1", "iPad3,2", "iPad3,3":           return "iPad 3"
    case "iPad3,4", "iPad3,5", "iPad3,6":           return "iPad 4"
    case "iPad4,1", "iPad4,2", "iPad4,3":           return "iPad Air"
    case "iPad5,3", "iPad5,4":                      return "iPad Air 2"
    case "iPad2,5", "iPad2,6", "iPad2,7":           return "iPad Mini"
    case "iPad4,4", "iPad4,5", "iPad4,6":           return "iPad Mini 2"
    case "iPad4,7", "iPad4,8", "iPad4,9":           return "iPad Mini 3"
    case "iPad5,1", "iPad5,2":                      return "iPad Mini 4"
    case "iPad6,7", "iPad6,8":                      return "iPad Pro"
    case "AppleTV5,3":                              return "Apple TV"
    case "i386", "x86_64":                          return "Simulator"
    default:                                        return identifier
    }
}

/// 获取iPhone名称
func iphoneName() -> String {
    return UIDevice.current.name
}

/// 获取app版本号
func appVersion() -> String {
    return Bundle.main.infoDictionary!["CFBundleShortVersionString"] as! String
}

/// 获取电池电量
func batteryLevel() -> CGFloat {
    return CGFloat(UIDevice.current.batteryLevel)
}

/// 当前系统名称
func systemName() -> String {
    return UIDevice.current.systemName
}

/// 当前系统版本号
func systemVersion() -> String {
    return UIDevice.current.systemVersion
}

/// 通用唯一识别码UUID
func UUID() -> String {
    return (UIDevice.current.identifierForVendor?.uuidString)!
}

/// 获取当前设备IP
func deviceIP() -> String? {
    var addresses = [String]()
    var ifaddr : UnsafeMutablePointer<ifaddrs>? = nil
    if getifaddrs(&ifaddr) == 0 {
        var ptr = ifaddr
        while (ptr != nil) {
            let flags = Int32(ptr!.pointee.ifa_flags)
            var addr = ptr!.pointee.ifa_addr.pointee
            if (flags & (IFF_UP|IFF_RUNNING|IFF_LOOPBACK)) == (IFF_UP|IFF_RUNNING) {
                if addr.sa_family == UInt8(AF_INET) || addr.sa_family == UInt8(AF_INET6) {
                    var hostname = [CChar](repeating: 0, count: Int(NI_MAXHOST))
                    if (getnameinfo(&addr, socklen_t(addr.sa_len), &hostname, socklen_t(hostname.count),nil, socklen_t(0), NI_NUMERICHOST) == 0) {
                        if let address = String(validatingUTF8:hostname) {
                            addresses.append(address)
                        }
                    }
                }
            }
            ptr = ptr!.pointee.ifa_next
        }
        freeifaddrs(ifaddr)
    }
    return addresses.first
}

/// 私有方法
private func blankof<T>(type:T.Type) -> T {
    let ptr = UnsafeMutablePointer<T>.allocate(capacity: MemoryLayout<T>.size)
    let val = ptr.pointee
    ptr.deinitialize(count: 0)
    return val
}

/// 获取总内存大小
func totalRAM() -> Int64 {
    var fs = blankof(type: statfs.self)
    if statfs("/var",&fs) >= 0{
        return Int64(UInt64(fs.f_bsize) * fs.f_blocks)
    }
    return -1
}

/// 获取当前可用内存
func availableRAM() -> Int64 {
    var fs = blankof(type: statfs.self)
    if statfs("/var",&fs) >= 0{
        return Int64(UInt64(fs.f_bsize) * fs.f_bavail)
    }
    return -1
}

/// 获取电池当前的状态，共有4种状态
func batteryState() -> String {
    let device = UIDevice.current
    if device.batteryState == UIDeviceBatteryState.unknown {
        return "unknown"
    } else if device.batteryState == UIDeviceBatteryState.unplugged {
        return "unplugged"
    } else if device.batteryState == UIDeviceBatteryState.charging {
        return "charging"
    } else if device.batteryState == UIDeviceBatteryState.full {
        return "full"
    }
    return ""
}

/// 获取当前语言
func deviceLanguage() -> String {
    return Locale.preferredLanguages[0]
}

顺带手，也把OC语言的代码一块贴在下面。
首先需要导入以下类库。

#import "sys/utsname.h"
#import <ifaddrs.h>
#import <arpa/inet.h>
#import <mach/mach.h>
#include <objc/runtime.h>

OC方法：

/// 屏幕宽度
+ (CGFloat)getDeviceScreenWidth {
    return [UIScreen mainScreen].bounds.size.width;
}

/// 屏幕高度
+ (CGFloat)getDeviceScreenHeight {
    return [UIScreen mainScreen].bounds.size.height;
}

/// 获取设备版本号
+ (NSString *)getDeviceName {
    // 需要导入 "sys/utsname.h"
    struct utsname systemInfo;
    uname(&systemInfo);
    NSString *deviceString = [NSString stringWithCString:systemInfo.machine encoding:NSUTF8StringEncoding];
    if ([deviceString isEqualToString:@"iPhone3,1"])    return @"iPhone 4";
    if ([deviceString isEqualToString:@"iPhone3,2"])    return @"iPhone 4";
    if ([deviceString isEqualToString:@"iPhone3,3"])    return @"iPhone 4";
    if ([deviceString isEqualToString:@"iPhone4,1"])    return @"iPhone 4S";
    if ([deviceString isEqualToString:@"iPhone5,1"])    return @"iPhone 5";
    if ([deviceString isEqualToString:@"iPhone5,2"])    return @"iPhone 5 (GSM+CDMA)";
    if ([deviceString isEqualToString:@"iPhone5,3"])    return @"iPhone 5c (GSM)";
    if ([deviceString isEqualToString:@"iPhone5,4"])    return @"iPhone 5c (GSM+CDMA)";
    if ([deviceString isEqualToString:@"iPhone6,1"])    return @"iPhone 5s (GSM)";
    if ([deviceString isEqualToString:@"iPhone6,2"])    return @"iPhone 5s (GSM+CDMA)";
    if ([deviceString isEqualToString:@"iPhone7,1"])    return @"iPhone 6 Plus";
    if ([deviceString isEqualToString:@"iPhone7,2"])    return @"iPhone 6";
    if ([deviceString isEqualToString:@"iPhone8,1"])    return @"iPhone 6s";
    if ([deviceString isEqualToString:@"iPhone8,2"])    return @"iPhone 6s Plus";
    if ([deviceString isEqualToString:@"iPhone8,4"])    return @"iPhone SE";
    if ([deviceString isEqualToString:@"iPod1,1"])      return @"iPod Touch 1G";
    if ([deviceString isEqualToString:@"iPod2,1"])      return @"iPod Touch 2G";
    if ([deviceString isEqualToString:@"iPod3,1"])      return @"iPod Touch 3G";
    if ([deviceString isEqualToString:@"iPod4,1"])      return @"iPod Touch 4G";
    if ([deviceString isEqualToString:@"iPod5,1"])      return @"iPod Touch (5 Gen)";
    if ([deviceString isEqualToString:@"iPad1,1"])      return @"iPad";
    if ([deviceString isEqualToString:@"iPad1,2"])      return @"iPad 3G";
    if ([deviceString isEqualToString:@"iPad2,1"])      return @"iPad 2 (WiFi)";
    if ([deviceString isEqualToString:@"iPad2,2"])      return @"iPad 2";
    if ([deviceString isEqualToString:@"iPad2,3"])      return @"iPad 2 (CDMA)";
    if ([deviceString isEqualToString:@"iPad2,4"])      return @"iPad 2";
    if ([deviceString isEqualToString:@"iPad2,5"])      return @"iPad Mini (WiFi)";
    if ([deviceString isEqualToString:@"iPad2,6"])      return @"iPad Mini";
    if ([deviceString isEqualToString:@"iPad2,7"])      return @"iPad Mini (GSM+CDMA)";
    if ([deviceString isEqualToString:@"iPad3,1"])      return @"iPad 3 (WiFi)";
    if ([deviceString isEqualToString:@"iPad3,2"])      return @"iPad 3 (GSM+CDMA)";
    if ([deviceString isEqualToString:@"iPad3,3"])      return @"iPad 3";
    if ([deviceString isEqualToString:@"iPad3,4"])      return @"iPad 4 (WiFi)";
    if ([deviceString isEqualToString:@"iPad3,5"])      return @"iPad 4";
    if ([deviceString isEqualToString:@"iPad3,6"])      return @"iPad 4 (GSM+CDMA)";
    if ([deviceString isEqualToString:@"iPad4,1"])      return @"iPad Air (WiFi)";
    if ([deviceString isEqualToString:@"iPad4,2"])      return @"iPad Air (Cellular)";
    if ([deviceString isEqualToString:@"iPad4,4"])      return @"iPad Mini 2 (WiFi)";
    if ([deviceString isEqualToString:@"iPad4,5"])      return @"iPad Mini 2 (Cellular)";
    if ([deviceString isEqualToString:@"iPad4,6"])      return @"iPad Mini 2";
    if ([deviceString isEqualToString:@"iPad4,7"])      return @"iPad Mini 3";
    if ([deviceString isEqualToString:@"iPad4,8"])      return @"iPad Mini 3";
    if ([deviceString isEqualToString:@"iPad4,9"])      return @"iPad Mini 3";
    if ([deviceString isEqualToString:@"iPad5,1"])      return @"iPad Mini 4 (WiFi)";
    if ([deviceString isEqualToString:@"iPad5,2"])      return @"iPad Mini 4 (LTE)";
    if ([deviceString isEqualToString:@"iPad5,3"])      return @"iPad Air 2";
    if ([deviceString isEqualToString:@"iPad5,4"])      return @"iPad Air 2";
    if ([deviceString isEqualToString:@"iPad6,3"])      return @"iPad Pro 9.7";
    if ([deviceString isEqualToString:@"iPad6,4"])      return @"iPad Pro 9.7";
    if ([deviceString isEqualToString:@"iPad6,7"])      return @"iPad Pro 12.9";
    if ([deviceString isEqualToString:@"iPad6,8"])      return @"iPad Pro 12.9";
    if ([deviceString isEqualToString:@"i386"])         return @"Simulator";
    if ([deviceString isEqualToString:@"x86_64"])       return @"Simulator";
    
    return deviceString;
}

/// 获取iPhone名称
+ (NSString *)getiPhoneName {
    return [UIDevice currentDevice].name;
}

/// 获取app版本号
+ (NSString *)getAPPVerion {
    return [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleShortVersionString"];
}

/// 获取电池电量
+ (CGFloat)getBatteryLevel {
    return [UIDevice currentDevice].batteryLevel;
}

/// 当前系统名称
+ (NSString *)getSystemName {
    return [UIDevice currentDevice].systemName;
}

/// 当前系统版本号
+ (NSString *)getSystemVersion {
    return [UIDevice currentDevice].systemVersion;
}

/// 通用唯一识别码UUID
+ (NSString *)getUUID {
    return [[UIDevice currentDevice] identifierForVendor].UUIDString;
}

// 获取当前设备IP
+ (NSString *)getDeviceIPAdress {
    NSString *address = @"an error occurred when obtaining ip address";
    struct ifaddrs *interfaces = NULL;
    struct ifaddrs *temp_addr = NULL;
    int success = 0;
    
    success = getifaddrs(&interfaces);
    
    if (success == 0) { // 0 表示获取成功
        
        temp_addr = interfaces;
        while (temp_addr != NULL) {
            if( temp_addr->ifa_addr->sa_family == AF_INET) {
                // Check if interface is en0 which is the wifi connection on the iPhone
                if ([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:@"en0"]) {
                    // Get NSString from C String
                    address = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)];
                }
            }
            temp_addr = temp_addr->ifa_next;
        }
    }
    
    freeifaddrs(interfaces);
    return address;
}

/// 获取总内存大小
+ (long long)getTotalMemorySize {
    return [NSProcessInfo processInfo].physicalMemory;
}

/// 获取当前可用内存
+ (long long)getAvailableMemorySize {
    vm_statistics_data_t vmStats;
    mach_msg_type_number_t infoCount = HOST_VM_INFO_COUNT;
    kern_return_t kernReturn = host_statistics(mach_host_self(), HOST_VM_INFO, (host_info_t)&vmStats, &infoCount);
    if (kernReturn != KERN_SUCCESS)
    {
        return NSNotFound;
    }
    
    return ((vm_page_size * vmStats.free_count + vm_page_size * vmStats.inactive_count));
}

/// 获取精准电池电量
+ (CGFloat)getCurrentBatteryLevel {
    UIApplication *app = [UIApplication sharedApplication];
    if (app.applicationState == UIApplicationStateActive||app.applicationState==UIApplicationStateInactive) {
        Ivar ivar=  class_getInstanceVariable([app class],"_statusBar");
        id status  = object_getIvar(app, ivar);
        for (id aview in [status subviews]) {
            int batteryLevel = 0;
            for (id bview in [aview subviews]) {
                if ([NSStringFromClass([bview class]) caseInsensitiveCompare:@"UIStatusBarBatteryItemView"] == NSOrderedSame&&[[[UIDevice currentDevice] systemVersion] floatValue] >=6.0) {
                    
                    Ivar ivar=  class_getInstanceVariable([bview class],"_capacity");
                    if(ivar) {
                        batteryLevel = ((int (*)(id, Ivar))object_getIvar)(bview, ivar);
                        if (batteryLevel > 0 && batteryLevel <= 100) {
                            return batteryLevel;
                            
                        } else {
                            return 0;
                        }
                    }
                }
            }
        }
    }
    
    return 0;
}

/// 获取电池当前的状态，共有4种状态
+ (NSString *) getBatteryState {
    UIDevice *device = [UIDevice currentDevice];
    if (device.batteryState == UIDeviceBatteryStateUnknown) {
        return @"UnKnow";
    } else if (device.batteryState == UIDeviceBatteryStateUnplugged){
        return @"Unplugged";
    } else if (device.batteryState == UIDeviceBatteryStateCharging){
        return @"Charging";
    } else if (device.batteryState == UIDeviceBatteryStateFull){
        return @"Full";
    }
    return nil;
}

/// 获取当前语言
+ (NSString *)getDeviceLanguage {
    NSArray *languageArray = [NSLocale preferredLanguages];
    return [languageArray objectAtIndex:0];
}
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