如何确定 iphone / ipad / ipod / appletv 是不是较旧、较新或等于同系列的其他设备？

Posted 2023-03-08

【中文标题】如何确定 iphone / ipad / ipod / appletv 是不是较旧、较新或等于同系列的其他设备？

【英文标题】：How to determine if iphone / ipad / ipod / appletv is older, newer or equal to other device of same family?如何确定 iphone / ipad / ipod / appletv 是否较旧、较新或等于同系列的其他设备？

【发布时间】：2013-01-18 12:14:23

【问题描述】：

我如何比较不同的平台？

示例： 我想知道当前设备是否比 iPhone 4S 旧。

【问题讨论】：

如果您对我的问题投反对票，请发表评论。为了改进它，我需要知道为什么这是一个糟糕的问题。

【参考方案1】：

将这些方法添加到某个类（例如 YourClass）：

+(NSString*)deviceVersion
    // get hardware device version string
    struct utsname systemInfo;
    uname(&systemInfo);
    return [NSString stringWithCString:systemInfo.machine
                              encoding:NSUTF8StringEncoding];
    /*      possible values:
     @"i386" (or similar)     on the simulator //
     @"iPod1,1"   on iPod Touch
     @"iPod2,1"   on iPod Touch Second Generation
     @"iPod3,1"   on iPod Touch Third Generation
     @"iPod4,1"   on iPod Touch Fourth Generation
     @"iPhone1,1" on iPhone
     @"iPhone1,2" on iPhone 3G
     @"iPhone2,1" on iPhone 3GS
     @"iPad1,1"   on iPad
     @"iPad2,1"   on iPad 2
     @"iPad3,1"   on iPad 3 (aka new iPad)
     @"iPhone3,1" on iPhone 4
     @"iPhone4,1" on iPhone 4S
     @"iPhone5,1" on iPhone 5
     @"iPhone5,2" on iPhone 5
     ...future version...?       */


+(NSNumber *)getVersionForDevice:(NSString*)deviceToCheck
    NSNumber* versionNumber = nil;
    if (deviceToCheck && ![deviceToCheck isEqualToString:@""]) 
        NSString* deviceMachine = [Utils deviceVersion];
        NSString* deviceVersion = nil;
        if ([deviceMachine hasPrefix:deviceToCheck]) 
            deviceVersion = [deviceMachine stringByReplacingOccurrencesOfString:deviceToCheck withString:@""];
            deviceVersion = [deviceVersion stringByReplacingOccurrencesOfString:@"," withString:@"."];
            float floatVersion = [deviceVersion floatValue];
            versionNumber = [NSNumber numberWithFloat:floatVersion];
        
    
    return versionNumber;



+(BOOL)isSimulator
    NSString* deviceMachine = [Utils deviceVersion];
    //    NSLog(@"Utils deviceMachine: %@", deviceMachine);
    if (![deviceMachine hasPrefix:@"iPhone"] && ![deviceMachine hasPrefix:@"iPod"] && ![deviceMachine hasPrefix:@"iPad"]) 
        return 1;
    
    return 0;

那么，如果在 iPhone 上并想测试版本：

float iPhoneVersion = [[YourClass getVersionForDevice:@"iPhone"] floatValue];

为 iPad 做类似的调用... iPod...

【讨论】：

有趣！看起来很有希望

【参考方案2】：

如果你需要做比较，你可以使用

https://github.com/fossli/uidevice-extension/blob/master/Source/UIDevice-Hardware.h https://github.com/fossli/uidevice-extension/blob/master/Source/UIDevice-Hardware.m

然后就可以轻松比较同类型的平台了

UIDeviceComparisonResult result = [[UIDevice currentDevice] compareCurrentPlatformWithOtherPlatform:@"iPhone4,1"];
BOOL isOlderThanIPhone4S = result == UIDeviceComparisonResultOtherNewer;
return isOlderThanIPhone4S;

所有平台的名称都可以在 UIDevice-Hardware.m 中找到