【IOS工具类】获得设备唯一标识，删除应用不重新生成

来源：互联网发布：js 引用怎么加时间戳编辑：程序博客网时间：2024/05/16 12:49

文章转载自：http://www.cnblogs.com/qingjoin/p/3549325.html （有做修改）

PS:因为使用keychain方式，所以删除应用不重新生成identifierForVendor

#define safeString(obj) (([obj isEqual:[NSNull null]]||obj==nil||[@"null"isEqual:obj]) ? @"" : ([NSString stringWithFormat:@"%@",obj]))

#import <Foundation/Foundation.h>@interface UUIDUtil : NSObject+(NSString *)getUUID;@end

#import "UUIDUtil.h"@implementation UUIDUtilstatic UUIDUtil * instance = nil;+(NSString *)getUUID{    NSString * const KEY_USERNAME_PASSWORD = @"com.sb.giftcardapp.usernamepassword";//这里你需要修改为自己应用的id，才不会重复    NSString * const KEY_PASSWORD = @"com.sb.giftcardapp.password";    NSMutableDictionary *readUserPwd = (NSMutableDictionary *)[self load:KEY_USERNAME_PASSWORD];    if(readUserPwd == nil || [@""isEqualToString:safeString([readUserPwd objectForKey:KEY_PASSWORD])]){        NSString *identifierStr = [[[UIDevice currentDevice] identifierForVendor] UUIDString];        NSMutableDictionary *usernamepasswordKVPairs = [NSMutableDictionary dictionary];        [usernamepasswordKVPairs setObject:identifierStr forKey:KEY_PASSWORD];        //save        [self save:KEY_USERNAME_PASSWORD data:usernamepasswordKVPairs];        //read        readUserPwd = (NSMutableDictionary *)[self load:KEY_USERNAME_PASSWORD];    }    NSString *uuidString = [readUserPwd objectForKey:KEY_PASSWORD];    NSLog(@"uuidString = %@",uuidString);    return uuidString;}+ (void)save:(NSString *)service data:(id)data{    //Get search dictionary    NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];    //Delete old item before add new item    SecItemDelete((__bridge CFDictionaryRef)keychainQuery);    //Add new object to search dictionary(Attention:the data format)    [keychainQuery setObject:[NSKeyedArchiver archivedDataWithRootObject:data] forKey:(__bridge id)kSecValueData];    //Add item to keychain with the search dictionary    SecItemAdd((__bridge CFDictionaryRef)keychainQuery, NULL);}+ (NSMutableDictionary *)getKeychainQuery:(NSString *)service {    return [NSMutableDictionary dictionaryWithObjectsAndKeys:            (__bridge id)kSecClassGenericPassword,(__bridge id)kSecClass,            service, (__bridge id)kSecAttrService,            service, (__bridge id)kSecAttrAccount,            (__bridge id)kSecAttrAccessibleAfterFirstUnlock,(__bridge id)kSecAttrAccessible,            nil];}//取+ (id)load:(NSString *)service {    id ret = nil;    NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];    //Configure the search setting    //Since in our simple case we are expecting only a single attribute to be returned (the password) we can set the attribute kSecReturnData to kCFBooleanTrue    [keychainQuery setObject:(__bridge id)kCFBooleanTrue forKey:(__bridge id)kSecReturnData];    [keychainQuery setObject:(__bridge id)kSecMatchLimitOne forKey:(__bridge id)kSecMatchLimit];    CFDataRef keyData = NULL;    if (SecItemCopyMatching((__bridge CFDictionaryRef)keychainQuery, (CFTypeRef *)&keyData) == noErr) {        @try {            ret = [NSKeyedUnarchiver unarchiveObjectWithData:(__bridge NSData *)keyData];        } @catch (NSException *e) {            NSLog(@"Unarchive of %@ failed: %@", service, e);        } @finally {        }    }    if (keyData)        CFRelease(keyData);    return ret;}+ (void)delete:(NSString *)service {    NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];    SecItemDelete((__bridge CFDictionaryRef)keychainQuery);}@end

使用方法

#import "UUIDUtil.h"#define UDID [UUIDUtil getUUID]

此类可以搭配我的另一个博文使用：http://blog.csdn.net/coooliang/article/details/39373649

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