要在兩個app間共享keychain。以下是步驟:
1:添加Security.framework,詳細步驟如下圖
2:打開Keychain Sharing。 在xcode中,點擊項目TARGETS->Capabilities下拉找到Keychain Sharing選項,然后打開,xcode會自動添加一個項目,如下圖,
說明一下:打開按鈕的時候,xcode會自動添加上當前app的一個group值,這個groupName就是要keychain要保存時候用到的groupName,可以有多個groupName;
3:然后就是寫代碼了。我用的是UICKeyChainStore庫,
下載地址在這里: https://github.com/kishikawakatsumi/UICKeyChainStore
保存的地方,#import "UICKeyChainStore.h"
然后,下面是一些工具函數
/*
@description生成通用的keychain ServiceName
@return str生成后的服務名
*/
+ (NSString*)keychainServiceName {
NSString*identifier = [[NSBundlemainBundle]bundleIdentifier];
returnidentifier;
}
/*
@description生成統一的keychain組名
@return str生成后的組名
*/
+ (NSString*)keychainGroupName {
NSString*bundleSeedID = [selfbundleSeedID];
NSString*groupName = [bundleSeedIDstringByAppendingString:@"."];
groupName = [groupNamestringByAppendingString:[selfkeychainServiceName]];
returngroupName;
}
/*
@description:獲取bundleSeedID
@return獲取到的bundleSeedID
*/
+ (NSString*)bundleSeedID {
NSDictionary*query = [NSDictionarydictionaryWithObjectsAndKeys:
kSecClassGenericPassword,kSecClass,
@"bundleSeedID",kSecAttrAccount,
@"",kSecAttrService,
(id)kCFBooleanTrue,kSecReturnAttributes,
nil];
CFDictionaryRefresult =nil;
OSStatusstatus =SecItemCopyMatching((CFDictionaryRef)query, (CFTypeRef*)&result);
if(status ==errSecItemNotFound)
status =SecItemAdd((CFDictionaryRef)query, (CFTypeRef*)&result);
if(status !=errSecSuccess)
returnnil;
NSString*accessGroup = [(__bridgeNSDictionary*)resultobjectForKey:kSecAttrAccessGroup];
NSArray*components = [accessGroupcomponentsSeparatedByString:@"."];
NSString*bundleSeedID = [[componentsobjectEnumerator]nextObject];
CFRelease(result);
returnbundleSeedID;
}
上面的函數,用戶生成通用的的groupName ,serviceName,這些都是在初始化keyChain對象的時候用到的。
注意,其中生成groupName的函數,groupName的格式必須是bundleSeed后面接".",再接上面步驟2中,keychain sharing列表生成的某一個groupName。
然后在隨便起一個key?
#define groupKey @"lallalallalal"
保存的代碼:
UICKeyChainStore*keychain = [UICKeyChainStorekeyChainStoreWithService:[selfkeychainServiceName]accessGroup:[selfkeychainGroupName]];
[keychain setString:stringToSave forKey:groupKey];
提取代碼
UICKeyChainStore*keychain = [UICKeyChainStorekeyChainStoreWithService:[selfkeychainServiceName]accessGroup:[selfkeychainGroupName]];
NSString *stringSaved = [keychain stringForKey:groupKey];
刪除代碼:
UICKeyChainStore*keychain = [UICKeyChainStorekeyChainStoreWithService:[selfkeychainServiceName]accessGroup:[selfkeychainGroupName]];
[keychainremoveItemForKey:groupKey];