如何利用鑰匙串存儲(chǔ)App的賬號(hào)信息丐箩，廢話不多說(shuō)直接上代碼

.h

@interface PRZKeychainTool : NSObject
/**
*  儲(chǔ)存字符串到??鑰匙串
*
*  @param sValue 對(duì)應(yīng)的Value
*  @param sKey   對(duì)應(yīng)的Key
*/
+ (void)saveKeychainValue:(NSString *)sValue key:(NSString *)sKey;

/**
*  從??鑰匙串獲取字符串
*
*  @param sKey 對(duì)應(yīng)的Key
*
*  @return 返回儲(chǔ)存的Value
*/
+ (NSString *)readKeychainValue:(NSString *)sKey;

/**
*  從??鑰匙串刪除字符串
*
*  @param sKey 對(duì)應(yīng)的Key
*/
+ (void)deleteKeychainValue:(NSString *)sKey;
@end 

.m

@implementation PRZKeychainTool

+ (NSMutableDictionary *)getKeychainQuery:(NSString *)service{
    return [NSMutableDictionary dictionaryWithObjectsAndKeys:
            (__bridge_transfer id)kSecClassGenericPassword,
            (__bridge_transfer id)kSecClass,service,
            (__bridge_transfer id)kSecAttrService,service,
            (__bridge_transfer id)kSecAttrAccount,
            (__bridge_transfer id)kSecAttrAccessibleAfterFirstUnlock,
            (__bridge_transfer id)kSecAttrAccessible,
            nil];
}

// 儲(chǔ)存字符串到??鑰匙串
+ (void)saveKeychainValue:(NSString *)sValue key:(NSString *)sKey{
    NSMutableDictionary * keychainQuery = [self getKeychainQuery:sKey];
    SecItemDelete((__bridge_retained CFDictionaryRef)keychainQuery);
    
    [keychainQuery setObject:[NSKeyedArchiver archivedDataWithRootObject:sValue] forKey:(__bridge_transfer id)kSecValueData];
    
    SecItemAdd((__bridge_retained CFDictionaryRef)keychainQuery, NULL);
}

// 從??鑰匙串獲取字符串
+ (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;
}

//  從??鑰匙串刪除字符串
+ (void)deleteKeychainValue:(NSString *)sKey {
    NSMutableDictionary *keychainQuery = [self getKeychainQuery:sKey];
    SecItemDelete((__bridge CFDictionaryRef)keychainQuery);
}

@end

使用

@interface ViewController ()
@property (weak, nonatomic) IBOutlet UITextField *oneTF;

@property (weak, nonatomic) IBOutlet UITextField *twoTF;
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
}

//讀取
- (IBAction)duqu:(id)sender {
    self.oneTF.text = [NSString stringWithFormat:@"讀取到用戶名：%@",[PRZKeychainTool readKeychainValue:@"uaneName"]];
    self.twoTF.text = [NSString stringWithFormat:@"讀取到用密碼：%@",[PRZKeychainTool readKeychainValue:@"paw"]];
}

//保存
- (IBAction)baocun:(id)sender {
    [PRZKeychainTool saveKeychainValue:self.oneTF.text key:@"uaneName"];
    [PRZKeychainTool saveKeychainValue:self.twoTF.text key:@"paw"];
}

//刪除
- (IBAction)shanchu:(id)sender {
    [PRZKeychainTool deleteKeychainValue:@"uaneName"];
    [PRZKeychainTool deleteKeychainValue:@"paw"];
}

![Uploading 645977-20151224142516359-146623890_193643.png . . .]##一、APP對(duì)鑰匙串的訪問(wèn)權(quán)限：
（1）未對(duì)應(yīng)用APP的entitlement（授權(quán)）進(jìn)行配置時(shí)恤煞，APP使用鑰匙串存儲(chǔ)時(shí)屎勘，會(huì)默認(rèn)存儲(chǔ)在自身BundleID的條目下。

645977-20151224142516359-146623890.png

參考鏈接

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