一个从NSString描述中脱离的类别
通常，在整个代码中避免任意的字符串比较是可取的。最好在一个地方更新字符串，并在应用程序中隐藏神奇的字符串。为此，我在UIDevice上提供了一个类别。
对于我的特定需求，我需要知道我正在使用的设备，而不需要知道可以通过其他方式轻松检索的网络功能的细节。因此，您将发现一个比不断增长的设备列表更粗粒度的枚举。
更新就是将设备添加到枚举和查找表中。
UIDevice + NTNUExtensions.h
typedef NS_ENUM(NSUInteger, NTNUDeviceType) {
DeviceAppleUnknown,
DeviceAppleSimulator,
DeviceAppleiPhone,
DeviceAppleiPhone3G,
DeviceAppleiPhone3GS,
DeviceAppleiPhone4,
DeviceAppleiPhone4S,
DeviceAppleiPhone5,
DeviceAppleiPhone5C,
DeviceAppleiPhone5S,
DeviceAppleiPhone6,
DeviceAppleiPhone6_Plus,
DeviceAppleiPhone6S,
DeviceAppleiPhone6S_Plus,
DeviceAppleiPhoneSE,
DeviceAppleiPhone7,
DeviceAppleiPhone7_Plus,
DeviceAppleiPodTouch,
DeviceAppleiPodTouch2G,
DeviceAppleiPodTouch3G,
DeviceAppleiPodTouch4G,
DeviceAppleiPad,
DeviceAppleiPad2,
DeviceAppleiPad3G,
DeviceAppleiPad4G,
DeviceAppleiPad5G_Air,
DeviceAppleiPadMini,
DeviceAppleiPadMini2G,
DeviceAppleiPadPro12,
DeviceAppleiPadPro9
};
@interface UIDevice (NTNUExtensions)
- (NSString *)ntnu_deviceDescription;
- (NTNUDeviceType)ntnu_deviceType;
@end
UIDevice + NTNUExtensions.m
#import <sys/utsname.h>
#import "UIDevice+NTNUExtensions.h"
@implementation UIDevice (NTNUExtensions)
- (NSString *)ntnu_deviceDescription
{
struct utsname systemInfo;
uname(&systemInfo);
return [NSString stringWithCString:systemInfo.machine encoding:NSUTF8StringEncoding];
}
- (NTNUDeviceType)ntnu_deviceType
{
NSNumber *deviceType = [[self ntnu_deviceTypeLookupTable] objectForKey:[self ntnu_deviceDescription]];
return [deviceType unsignedIntegerValue];
}
- (NSDictionary *)ntnu_deviceTypeLookupTable
{
return @{
@"i386": @(DeviceAppleSimulator),
@"x86_64": @(DeviceAppleSimulator),
@"iPod1,1": @(DeviceAppleiPodTouch),
@"iPod2,1": @(DeviceAppleiPodTouch2G),
@"iPod3,1": @(DeviceAppleiPodTouch3G),
@"iPod4,1": @(DeviceAppleiPodTouch4G),
@"iPhone1,1": @(DeviceAppleiPhone),
@"iPhone1,2": @(DeviceAppleiPhone3G),
@"iPhone2,1": @(DeviceAppleiPhone3GS),
@"iPhone3,1": @(DeviceAppleiPhone4),
@"iPhone3,3": @(DeviceAppleiPhone4),
@"iPhone4,1": @(DeviceAppleiPhone4S),
@"iPhone5,1": @(DeviceAppleiPhone5),
@"iPhone5,2": @(DeviceAppleiPhone5),
@"iPhone5,3": @(DeviceAppleiPhone5C),
@"iPhone5,4": @(DeviceAppleiPhone5C),
@"iPhone6,1": @(DeviceAppleiPhone5S),
@"iPhone6,2": @(DeviceAppleiPhone5S),
@"iPhone7,1": @(DeviceAppleiPhone6_Plus),
@"iPhone7,2": @(DeviceAppleiPhone6),
@"iPhone8,1" :@(DeviceAppleiPhone6S),
@"iPhone8,2" :@(DeviceAppleiPhone6S_Plus),
@"iPhone8,4" :@(DeviceAppleiPhoneSE),
@"iPhone9,1" :@(DeviceAppleiPhone7),
@"iPhone9,3" :@(DeviceAppleiPhone7),
@"iPhone9,2" :@(DeviceAppleiPhone7_Plus),
@"iPhone9,4" :@(DeviceAppleiPhone7_Plus),
@"iPad1,1": @(DeviceAppleiPad),
@"iPad2,1": @(DeviceAppleiPad2),
@"iPad3,1": @(DeviceAppleiPad3G),
@"iPad3,4": @(DeviceAppleiPad4G),
@"iPad2,5": @(DeviceAppleiPadMini),
@"iPad4,1": @(DeviceAppleiPad5G_Air),
@"iPad4,2": @(DeviceAppleiPad5G_Air),
@"iPad4,4": @(DeviceAppleiPadMini2G),
@"iPad4,5": @(DeviceAppleiPadMini2G),
@"iPad4,7":@(DeviceAppleiPadMini),
@"iPad6,7":@(DeviceAppleiPadPro12),
@"iPad6,8":@(DeviceAppleiPadPro12),
@"iPad6,3":@(DeviceAppleiPadPro9),
@"iPad6,4":@(DeviceAppleiPadPro9)
};
}
@end
