kenguba666/XYUUID

iOS14 UUID KeyChain DeviceInfo IDFA UDID

XYUUID

背景

• iOS 10开始，IDFA可能会被用户限制广告追踪，导致无法正常获取IDFA，从而导致无法使用IDFA作为唯一设备标识

XYUUID的优点

• API简单
• 使用了最新的iOS 14 API来获取IDFA
• 具有不同持久性级别的通用唯一标识符

uuidForDevice的有点

• 较长的时效性
• 较长的存储性
• 较低的冲突率
• 较低的漂移率

API

获取不同持久化级别的UUID

/// 随机UUID，此值每次都会刷新
+ (NSString *)uuid;

/// 安装UUID，每次重新安装，此值会刷新
+ (NSString *)uuidForInstall;

/// 开启应用UUID，每次开启应用，此值会刷新
+ (NSString *)uuidForAppOpen;

/// IDFA，开启关闭授权，此值会刷新
+ (NSString *)uuidForIDFA;

/// IDFV
+ (NSString *)uuidForIDFV;

/// 设备信息UUID，根据设备信息生成，能维持一段时间内不变
+ (NSString *)uuidForDeviceInfo;

/// 钥匙串UUID，卸载应用保持不变
+ (NSString *)uuidForKeychain;

/// 设备UUID，设备唯一标识符
+ (NSString *)uuidForDevice;

持久化级别

UUID	App relaunch	Reset Advertising Identifier	App reinstall	System reboot	System upgrade	System reset
uuid	❌	❌	❌	❌	❌	❌
uuidForInstall	✅	✅	❌	✅	✅	❌
uuidForAppOpen	❌	✅	❌	❌	❌	❌
uuidForIDFA	✅	❌	✅	✅	✅	❌
uuidForIDFV	✅	✅	❌	✅	✅	❌
uuidForDeviceInfo	✅	✅	✅	❌	❌	❌
uuidForKeychain	✅	✅	✅	✅	✅	❌
uuidForDevice	✅	✅	✅	✅	✅	❌