在開(kāi)發(fā)過(guò)程中富腊，很多時(shí)候需要查看該用戶是上傳唯一識(shí)別標(biāo)志，安卓設(shè)備可以設(shè)定上傳IMEI赃承。但蘋(píng)果設(shè)備已經(jīng)不支持獲取IMEI,作為替代我們使用UUID來(lái)作唯一標(biāo)示符。
****一悴侵、uuid類和keychain類****
#import <Foundation/Foundation.h>
@interface HAUUID : NSObject
/**
* 獲取uuid
*
* @param block 返回uuid和是否初裝
*/
+ (void)getUUIDCompletionBlock:(void(^)(NSString*UUIDString,BOOL firstInstall))block;
@end
#import "HAUUID.h"
#import "HAKeyChainStore.h"
#define KEY_USERNAME_PASSWORD @""
#define KEY_USERNAME @"com.company.app.username"
#define KEY_PASSWORD @"com.company.app.password"
@implementation HAUUID
+ (void)getUUIDCompletionBlock:(void(^)(NSString*UUIDString,BOOL firstInstall))block{
NSString * strUUID = (NSString *)[HAKeyChainStore load:KEY_USERNAME_PASSWORD];
BOOL installState =NO;
//首次執(zhí)行該方法時(shí)瞧剖，uuid為空
if ([strUUID isEqualToString:@""] || !strUUID)
{
installState =YES;//初裝
//生成一個(gè)uuid的方法
CFUUIDRef uuidRef = CFUUIDCreate(kCFAllocatorDefault);
strUUID = (NSString *)CFBridgingRelease(CFUUIDCreateString (kCFAllocatorDefault,uuidRef));
//將該uuid保存到keychain
[HAKeyChainStore save:KEY_USERNAME_PASSWORD data:strUUID];
}
block(strUUID,installState);
}
@end
#import <Foundation/Foundation.h>
@interface HAKeyChainStore : NSObject
+ (void)save:(NSString *)service data:(id)data;
+ (id)load:(NSString *)service;
+ (void)deleteKeyData:(NSString *)service;
@end
#import "HAKeyChainStore.h"
@implementation HAKeyChainStore
+ (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 search dictionary(Attention:the data format)
[keychainQuery setObject:[NSKeyedArchiver archivedDataWithRootObject:data] forKey:(id)kSecValueData];
//Add item to keychain with the search dictionary
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 are expecting only a single attribute to be returned (the password) we can 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(@"Unarchive of %@ failed: %@", service, e);
} @finally {
}
}
if (keyData)
CFRelease(keyData);
return ret;
}
+ (void)deleteKeyData:(NSString *)service {
NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];
SecItemDelete((CFDictionaryRef)keychainQuery);
}
@end
****二、生成Entitlements文件****
左側(cè)的目錄會(huì)自動(dòng)生成Entitlements文件可免，不需要自己創(chuàng)建了抓于。
也就是說(shuō)，Bundle Identifier浇借、Keychain Sharing的Keychain Groups捉撮、Entitlements文件的Keychain Access Groups的第一個(gè)元素，它們要保持上圖所示的一致性妇垢。
