判断型号

https://www.theiphonewiki.com/wiki/Models

Swift

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)))
}

OC

第一种方法

// 导入头文件
#include <sys/sysctl.h>

size_t size;
int nR = sysctlbyname("hw.machine", NULL, &size, NULL, 0);
char *machine = (char *)malloc(size);
nR = sysctlbyname("hw.machine", machine, &size, NULL, 0);
NSString *platform = [NSString stringWithCString:machine encoding:NSUTF8StringEncoding];
free(machine);

第二种方法

// 导入头文件
#include <sys/utsname.h>

struct utsname systemInfo;
uname(&systemInfo);
NSString *deviceString = [NSString stringWithCString:systemInfo.machine encoding:NSUTF8StringEncoding];

GODeviceModels

部分代码如下，最新代码移步 github

import UIKit

enum GODeviceModelsType {
    case Unknown
    
    case Simulator
    
    case IPhone 
    
    ...
}

class GODeviceModels {
    
    static let shared = GODeviceModels()
    
    var model = (GODeviceModelsType.Unknown, "Unknown")
    
    private init() {
        
        model = model(id: identifier())
    }
}

extension GODeviceModels {
    
    private func model(id: String) -> (type: GODeviceModelsType, string: String) {
        
        switch id {
            
            // MARK: - iPad
        case "iPad1,1":
            return (.IPad, "iPad") 
            
            
            // MARK: - iPad Air
        case "iPad4,1", "iPad4,2", "iPad4,3":
            return (.IPadAir, "iPad Air") 
            
            
            // MARK: - iPad Pro
        case"iPad6,7", "iPad6,8":
            return (.IPadPro_inch12_9, "iPad Pro (12.9-inch)") 
            
            // MARK: - iPad mini
        case"iPad2,5", "iPad2,6", "iPad2,7":
            return (.IPadMini, "iPad mini") 
            
            
            // MARK: - iPhone
        case"iPhone1,1":
            return (.IPhone, "iPhone") 
            
            
            // MARK: - iPod touch
        case"iPod1,1":
            return (.IPodTouch, "iPod touch") 
            
            
            // MARK: - Simulator
        case "i386", "x86_64":
            return (.Simulator, "Simulator")
            
        default:
            return (.Unknown, "Unknown")
        }
    }
}

extension GODeviceModels {
    
    private func identifier() -> 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)))
        }
        
        return identifier
    }
}

设备型号尺寸：

https://developer.apple.com/library/content/qa/qa1686/_index.html

https://developer.apple.com/design/human-interface-guidelines/ios/visual-design/adaptivity-and-layout/

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