iOS开发之获取设备唯一标识UUID
首先我们知道获取设备标识的三种方法
/** 卸载应用重新安装后会不一致*/ + (NSString *)getUUID{ CFUUIDRef uuid = CFUUIDCreate(NULL); NSString *UUID = (__bridge_transfer NSString *)CFUUIDCreateString(NULL, uuid); CFRelease(uuid); return UUID; } /** 卸载应用重新安装后会不一致*/ + (NSString *)getUUID{ return [UIDevice currentDevice].identifierForVendor.UUIDString;; } /** 不会因为应用卸载改变 * 但是用户在设置-隐私-广告里面限制广告跟踪后会变成@"00000000-0000-0000-0000-000000000000" * 重新打开后会变成另一个,还原广告标识符也会变 */ + (NSString *)getUUID{ return [[[ASIdentifierManager sharedManager] advertisingIdentifier] UUIDString]; }
我们看这三个方法是不是都不稳妥,可能都会改变,那我们得想个办法把值存好了,存到钥匙串
首先打开钥匙串权限
然后是核心存储代码
#import <Foundation/Foundation.h> @interface KeyChainStore : NSObject + (void)save:(NSString*)service data:(id)data; + (id)load:(NSString*)service; + (void)deleteKeyData:(NSString*)service; @end
#import "KeyChainStore.h" @implementation KeyChainStore + (NSMutableDictionary*)getKeychainQuery:(NSString*)service { return[NSMutableDictionary dictionaryWithObjectsAndKeys: (id)kSecClassGenericPassword,(id)kSecClass, service,(id)kSecAttrService, service,(id)kSecAttrAccount, (id)kSecAttrAccessibleAfterFirstUnlock,(id)kSecAttrAccessible, nil]; } + (void)save:(NSString*)service data:(id)data{ //Get search dictionary NSMutableDictionary*keychainQuery = [self getKeychainQuery:service]; //Delete old item before add new item SecItemDelete((CFDictionaryRef)keychainQuery); //Add new object to searchdictionary(Attention:the data format) [keychainQuery setObject:[NSKeyedArchiver archivedDataWithRootObject:data]forKey:(id)kSecValueData]; //Add item to keychain with the searchdictionary SecItemAdd((CFDictionaryRef)keychainQuery,NULL); } + (id)load:(NSString*)service { id ret =nil; NSMutableDictionary*keychainQuery = [self getKeychainQuery:service]; //Configure the search setting //Since in our simple case we areexpecting only a single attribute to be returned (the password) wecan set the attribute kSecReturnData to kCFBooleanTrue [keychainQuery setObject:(id)kCFBooleanTrue forKey:(id)kSecReturnData]; [keychainQuery setObject:(id)kSecMatchLimitOne forKey:(id)kSecMatchLimit]; CFDataRef keyData =NULL; if(SecItemCopyMatching((CFDictionaryRef)keychainQuery,(CFTypeRef*)&keyData) ==noErr){ @try{ ret =[NSKeyedUnarchiver unarchiveObjectWithData:(__bridge NSData*)keyData]; }@catch(NSException *e) { NSLog(@"Unarchiveof %@ failed: %@",service, e); }@finally{ } } if(keyData) CFRelease(keyData); return ret; } + (void)deleteKeyData:(NSString*)service { NSMutableDictionary*keychainQuery = [self getKeychainQuery:service]; SecItemDelete((CFDictionaryRef)keychainQuery); } @end
调用代码
/** 获取UUID*/ + (NSString *)getUUIDByKeyChain{ // 这个key的前缀最好是你的BundleID NSString*strUUID = (NSString*)[KeyChainStore load:@"com.mycompany.myapp.usernamepassword"]; //首次执行该方法时,uuid为空 if([strUUID isEqualToString:@""]|| !strUUID) { // 获取UUID 这个是要引入<AdSupport/AdSupport.h>的 strUUID = [[[ASIdentifierManager sharedManager] advertisingIdentifier] UUIDString]; if(strUUID.length ==0 || [strUUID isEqualToString:@"00000000-0000-0000-0000-000000000000"]) { //生成一个uuid的方法 CFUUIDRef uuidRef= CFUUIDCreate(kCFAllocatorDefault); strUUID = (NSString*)CFBridgingRelease(CFUUIDCreateString(kCFAllocatorDefault,uuidRef)); CFRelease(uuidRef); } //将该uuid保存到keychain [KeyChainStore save:@"com.mycompany.myapp.usernamepassword" data:strUUID]; } return strUUID; }
借鉴链接 https://blog.csdn.net/lg767201403/article/details/80568798
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