IOS Keychain Stores user data

Reference: HTTP://WWW.JIANSHU.COM/P/F6D40065BB6C

#import <Foundation/Foundation.h> #import <Security/Security.h> @interface jckeychaintool:nsobject/** *  save string to?? Keychain * *  @param svalue corresponding value *  @param sKey   corresponding key */+ (void) Savekeychainvalue: (NSString *) svalue key: ( NSString *) skey;/** *  from?? The keychain gets the string * *  @param sKey corresponding key * *  @return returns the stored value */+ (NSString *) Readkeychainvalue: (NSString *) skey;/** *
    from?? Keychain Delete String * *  @param sKey corresponding key */+ (void) Deletekeychainvalue: (NSString *) SKey; @end

#import "JCKeychainTool.h" @implementation jckeychaintool+ (Nsmutabledictionary *) Getkeychainquery: (NSString *) service{return [nsmutabledictionary Dictionarywithobjectsandkeys: (__bridge_transfer ID) ksecclassgenericpas            Sword, (__bridge_transfer id) ksecclass,service, (__bridge_transfer ID) ksecattrservice,service,            (__bridge_transfer ID) ksecattraccount, (__bridge_transfer ID) ksecattraccessibleafterfirstunlock, (__bridge_transfer ID) ksecattraccessible, nil];} + (void) Savekeychainvalue: (NSString *) svalue key: (NSString *) skey{nsmutabledictionary * keychainquery = [self getKeych    Ainquery:skey];        Secitemdelete ((__bridge_retained cfdictionaryref) keychainquery); [Keychainquery setobject:[nskeyedarchiver Archiveddatawithrootobject:svalue] Forkey: (__bridge_transfer ID)        Ksecvaluedata];    Secitemadd ((__bridge_retained cfdictionaryref) keychainquery, NULL); }+ (NSString *) Readkeychainvalue: (NSString *) SKey{NSString *ret = nil;    Nsmutabledictionary *keychainquery = [self getkeychainquery:skey];    [Keychainquery setobject: (ID) kcfbooleantrue Forkey: (__bridge_transfer ID) ksecreturndata];    [Keychainquery setobject: (__bridge_transfer ID) ksecmatchlimitone forkey: (__bridge_transfer ID) kSecMatchLimit];    Cfdataref keyData = NULL;            if (secitemcopymatching (__bridge cfdictionaryref) keychainquery, (Cftyperef *) &keydata) = = NOERR) {@try {        RET = (NSString *) [Nskeyedunarchiver unarchiveobjectwithdata: (__bridge NSData *) KeyData];        } @catch (NSException *e) {NSLog (@ "Unarchive of%@ failed:%@", SKey, E);    } @finally {}} if (KeyData) cfrelease (keyData); return ret;}    + (void) Deletekeychainvalue: (NSString *) SKey {nsmutabledictionary *keychainquery = [self getkeychainquery:skey]; Secitemdelete ((__bridge cfdictionaryref) keychainquery);} @end

Save [jckeychaintool savekeychainvalue:@ "xxx" key:@ "userName"]; [Jckeychaintool savekeychainvalue:@ "yyy" key:@ "password"];//read [Jckeychaintool readkeychainvalue:@ "UserName"]; [Jckeychaintool readkeychainvalue:@ "password"];//delete [Jckeychaintool deletekeychainvalue:@ "UserName"]; [Jckeychaintool deletekeychainvalue:@ "password"];

IOS Keychain Stores user data