iOS开发之获取设备唯一标识UUID

湖南登哥 發表於 2019-9-20 10:09:00

首先我们知道获取设备标识的三种方法
<div class="cnblogs_code">
<pre>/**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 .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 [[ advertisingIdentifier] UUIDString];
}</pre>
</div>
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
<img src="https://img2018.cnblogs.com/blog/1347820/201909/1347820-20190920100426826-2138695968.png" alt="">
 
 然后是核心存储代码
<div class="cnblogs_code">
<pre>#import <Foundation/Foundation.h>

@interface KeyChainStore : NSObject
+ (void)save:(NSString*)service data:(id)data;
+ (id)load:(NSString*)service;
+ (void)deleteKeyData:(NSString*)service;
@end</pre>
</div>
<div class="cnblogs_code">
<pre>#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 = ;
//Delete old item before add new item
 SecItemDelete((CFDictionaryRef)keychainQuery);
//Add new object to searchdictionary(Attention:the data format)
forKey:(id)kSecValueData];
//Add item to keychain with the searchdictionary
 SecItemAdd((CFDictionaryRef)keychainQuery,NULL);
}

+ (id)load:(NSString*)service {
id ret =nil;
NSMutableDictionary*keychainQuery = ;
//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
;
;
CFDataRef keyData =NULL;
if(SecItemCopyMatching((CFDictionaryRef)keychainQuery,(CFTypeRef*)&keyData) ==noErr){
 @try{
 ret =;
 }@catch(NSException *e) {
 NSLog(@"Unarchiveof %@ failed: %@",service, e);
 }@finally{
 }
}
if(keyData)
 CFRelease(keyData);
return ret;
}

+ (void)deleteKeyData:(NSString*)service {
NSMutableDictionary*keychainQuery = ;
SecItemDelete((CFDictionaryRef)keychainQuery);
}

@end</pre>
</div>
调用代码
<div class="cnblogs_code">
<pre>/**获取UUID*/
+ (NSString *)getUUIDByKeyChain{
// 这个key的前缀最好是你的BundleID
NSString*strUUID = (NSString*);
//首次执行该方法时，uuid为空
if(|| !strUUID)
{
 // 获取UUID 这个是要引入<AdSupport/AdSupport.h>的
 strUUID = [[ advertisingIdentifier] UUIDString];

 if(strUUID.length ==0 || )
 {
 //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
 ;
}
return strUUID;
}</pre>
</div>
借鉴链接 https://blog.csdn.net/lg767201403/article/details/80568798
  
来源：https://www.cnblogs.com/hecanlin/p/11555184.html

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iOS开发之获取设备唯一标识UUID