裝置標識

關於裝置標識，歷史上盛行過很多英雄，比如UDID、Mac地址、OpenUDID等，然而他們都陸陸續續倒在了蘋果的門下。蘋果目前提供了2個方法供App獲取裝置標識：idfa和idfv

idfa：全稱advertisingIdentifier，官方解釋是廣告標識，適用於廣告推廣，這個建議不要輕易使用，如果用了，則App裡必須提供廣告功能，否則很有可能會在AppStore稽核時被拒。而且idfa是可以被使用者關閉的（設定-》隱私），一旦被關閉，就獲取不到了。

idfv：全稱identifierForVendor，按照字面意思理解，相同的Vendor應該有相同的identifier。Vendor是根據app的bundleid的前兩位來界定的，比如對於com.abc.app1和com.abc.app2這2個bundleid的app來說，他們就屬於同一個vendor。idfv是一定可以獲取到的。需要注意的一點是，當用戶將某個vendor下的所有app都解除安裝掉時，idfv就會被重置，再次安裝時，獲取到的idfv會跟之前的不一樣。所以我用的方案是：idfv+keychain。當然如果使用者選擇恢復出廠設定，那麼還是會出現不一樣，這種情況就沒法處理了。

+(NSString *)identifier
{
    NSString *key = @"com.app.keychain.uuid";
    KeychainItemWrapper *keychainItem = [[KeychainItemWrapper alloc] initWithIdentifier:key accessGroup:nil];
    
    NSString *strUUID = [keychainItem objectForKey:(__bridge id)kSecValueData];
    
    if (strUUID.length <= 0
 
) {
        strUUID = [[[UIDevice currentDevice] identifierForVendor] UUIDString];
        
        [keychainItem setObject:@"uuid" forKey:(__bridge id)kSecAttrAccount];
        [keychainItem setObject:strUUID forKey:(__bridge id)kSecValueData];
    }
    
    return strUUID;
}

手機別名

+(NSString *)phoneName
{
    
 
return [[UIDevice currentDevice] name];
}

手機系統版本

/**
 *  手機系統版本
 *
 *  @return e.g. 8.0
 */
+(NSString *)phoneVersion{
    return [[UIDevice currentDevice] systemVersion];
}

手機型號

這個方法只能獲取到iPhone、iPad這種資訊，無法獲取到是iPhone 4、iPhpone5這種具體的型號。

/**
 *  手機型號
 *
 *  @return e.g. iPhone
 */
+(NSString *)phoneModel{
    return [[UIDevice currentDevice] model];
}

裝置版本

這個程式碼可以獲取到具體的裝置版本（已更新到iPhone 6s、iPhone 6s Plus），缺點是：採用的硬編碼。具體的對應關係可以參考：https://www.theiphonewiki.com/wiki/Models

這個方法可以通過AppStore的稽核，放心用吧。

/**
 *  裝置版本
 *
 *  @return e.g. iPhone 5S
 */
+ (NSString*)deviceVersion
{
    // 需要#import "sys/utsname.h"
    struct utsname systemInfo;
    uname(&systemInfo);
    NSString *deviceString = [NSString stringWithCString:systemInfo.machine encoding:NSUTF8StringEncoding];
    
    //iPhone
    if ([deviceString isEqualToString:@"iPhone1,1"])    return @"iPhone 1G";
    if ([deviceString isEqualToString:@"iPhone1,2"])    return @"iPhone 3G";
    if ([deviceString isEqualToString:@"iPhone2,1"])    return @"iPhone 3GS";
    if ([deviceString isEqualToString:@"iPhone3,1"])    return @"iPhone 4";
    if ([deviceString isEqualToString:@"iPhone3,2"])    return @"Verizon 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";
    if ([deviceString isEqualToString:@"iPhone5,3"])    return @"iPhone 5C";
    if ([deviceString isEqualToString:@"iPhone5,4"])    return @"iPhone 5C";
    if ([deviceString isEqualToString:@"iPhone6,1"])    return @"iPhone 5S";
    if ([deviceString isEqualToString:@"iPhone6,2"])    return @"iPhone 5S";
    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";
    
    //iPod
    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 5G";
    
    //iPad
    if ([deviceString isEqualToString:@"iPad1,1"])      return @"iPad";
    if ([deviceString isEqualToString:@"iPad2,1"])      return @"iPad 2 (WiFi)";
    if ([deviceString isEqualToString:@"iPad2,2"])      return @"iPad 2 (GSM)";
    if ([deviceString isEqualToString:@"iPad2,3"])      return @"iPad 2 (CDMA)";
    if ([deviceString isEqualToString:@"iPad2,4"])      return @"iPad 2 (32nm)";
    if ([deviceString isEqualToString:@"iPad2,5"])      return @"iPad mini (WiFi)";
    if ([deviceString isEqualToString:@"iPad2,6"])      return @"iPad mini (GSM)";
    if ([deviceString isEqualToString:@"iPad2,7"])      return @"iPad mini (CDMA)";
    
    if ([deviceString isEqualToString:@"iPad3,1"])      return @"iPad 3(WiFi)";
    if ([deviceString isEqualToString:@"iPad3,2"])      return @"iPad 3(CDMA)";
    if ([deviceString isEqualToString:@"iPad3,3"])      return @"iPad 3(4G)";
    if ([deviceString isEqualToString:@"iPad3,4"])      return @"iPad 4 (WiFi)";
    if ([deviceString isEqualToString:@"iPad3,5"])      return @"iPad 4 (4G)";
    if ([deviceString isEqualToString:@"iPad3,6"])      return @"iPad 4 (CDMA)";
    
    if ([deviceString isEqualToString:@"iPad4,1"])      return @"iPad Air";
    if ([deviceString isEqualToString:@"iPad4,2"])      return @"iPad Air";
    if ([deviceString isEqualToString:@"iPad4,3"])      return @"iPad Air";
    if ([deviceString isEqualToString:@"iPad5,3"])      return @"iPad Air 2";
    if ([deviceString isEqualToString:@"iPad5,4"])      return @"iPad Air 2";
    if ([deviceString isEqualToString:@"i386"])         return @"Simulator";
    if ([deviceString isEqualToString:@"x86_64"])       return @"Simulator";
    
    if ([deviceString isEqualToString:@"iPad4,4"]
        ||[deviceString isEqualToString:@"iPad4,5"]
        ||[deviceString isEqualToString:@"iPad4,6"])      return @"iPad mini 2";
    
    if ([deviceString isEqualToString:@"iPad4,7"]
        ||[deviceString isEqualToString:@"iPad4,8"]
        ||[deviceString isEqualToString:@"iPad4,9"])      return @"iPad mini 3";
    
    return deviceString;
}