在OS X上获取模型标识符字符串

Question

每台Mac都有一个型号标识符,例如"Macmini5,1".(这些显示在"系统信息"应用程序中.)

我如何以编程方式获取此模型标识符字符串？

Answer 1

您可以使用 sysctl

#import <Foundation/Foundation.h>
#import <sys/sysctl.h>

NSString *ModelIdentifier()
{
    NSString *result=@"Unknown Mac";
    size_t len=0;
    sysctlbyname("hw.model", NULL, &len, NULL, 0);
    if (len) {
        NSMutableData *data=[NSMutableData dataWithLength:len];
        sysctlbyname("hw.model", [data mutableBytes], &len, NULL, 0);
        result=[NSString stringWithUTF8String:[data bytes]];
    }
    return result;
}

Answer 2

您也可以使用IOKit.framework. 我认为这是最好的选择。

这个简单的代码示例展示了如何从 I/O Kit 注册表读取模型标识符到NSString：

- (NSString *)modelIdentifier {
    io_service_t service = IOServiceGetMatchingService(kIOMasterPortDefault, 
                                                       IOServiceMatching("IOPlatformExpertDevice"));

    CFStringRef model = IORegistryEntryCreateCFProperty(service, 
                                                        CFSTR("model"), 
                                                        kCFAllocatorDefault, 
                                                        0);

    NSString *modelIdentifier = [[NSString alloc] initWithData:(__bridge NSData *)model 
                                                      encoding:NSUTF8StringEncoding];

    CFRelease(model);
    IOObjectRelease(service);

    return modelIdentifier;
}

上面代码中的字符串“IOPlatformExpertDevice”和“model”用于从 I/O Kit 注册表中读取模型标识符。ioreg当您想从 I/O Kit 注册表中查找信息时，命令行工具是您的朋友。此图像显示ioreg输出中的这些字符串：

我希望这有助于使用IOKit.framework.

Answer 3

使用IOKit的Swift 4

public func getMacModel() -> String? {
    let service = IOServiceGetMatchingService(kIOMasterPortDefault,
                                              IOServiceMatching("IOPlatformExpertDevice"))
    var modelIdentifier: String?
    if let modelData = IORegistryEntryCreateCFProperty(service, "model" as CFString, kCFAllocatorDefault, 0).takeRetainedValue() as? Data {
        modelIdentifier = String(data: modelData, encoding: .utf8)
    }

    IOObjectRelease(service)
    return modelIdentifier
}

Answer 4

Ryan H 的答案是正确的，除了从null-terminated string到 的转换不正确，最后Swift String给出带有符号的结果，这是您可能意想不到的，执行完全匹配。\0这是更正后的版本：

static private func modelIdentifier() -> String? {
    let service = IOServiceGetMatchingService(kIOMasterPortDefault, IOServiceMatching("IOPlatformExpertDevice"))
    defer { IOObjectRelease(service) }

    if let modelData = IORegistryEntryCreateCFProperty(service, "model" as CFString, kCFAllocatorDefault, 0).takeRetainedValue() as? Data {
        return modelData.withUnsafeBytes { (cString: UnsafePointer<UInt8>) -> String in
            return String(cString: cString)
        }
    }

    return nil
}