[英]iOS KeyChain Items not being updated between multiple targets of an app
我正在構建一個應用程序,人們需要能夠從iOS照片應用程序共享照片。 為此,人們需要登錄到該應用程序。
因此,我為共享創建了一個新的iOS目標。 現在,我正在使用KeychainItemWrapper來存儲用戶憑據。 因此,主要目標(如共享表目標)都使用iOS鑰匙串來檢索登錄信息。
現在,當我從主應用程序注銷,然后以其他用戶身份登錄,然后啟動共享表時,看起來共享表仍然具有來自先前用戶的舊數據。
那怎么可能? 如何確保兩個目標始終使用鑰匙串中的最新數據?
#import "KeychainManager.h"
#import "KeychainItemWrapper.h"
NSString * const CREDENTIALS_IDENTIFIER = @"credentials";
NSString * const COOKIES_IDENTIFIER = @"cookies";
static KeychainManager *keychainManager;
@implementation KeychainManager
+ (instancetype)sharedCredentailsManager {
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
keychainManager = [[KeychainManager alloc] init];
});
return keychainManager;
}
#pragma mark - Getter
- (KeychainItemWrapper *)credentialsKeychainItem {
return [[KeychainItemWrapper alloc] initWithIdentifier:CREDENTIALS_IDENTIFIER accessGroup:nil];
}
- (KeychainItemWrapper *)cookiesKeychainItem {
return [[KeychainItemWrapper alloc] initWithIdentifier:COOKIES_IDENTIFIER accessGroup:nil];
}
- (NSString *)domainName {
NSString *domainName = [self.credentialsKeychainItem objectForKey:(__bridge id)(kSecAttrService)];
return (domainName.length > 0) ? domainName : @"";
}
- (NSString *)userName {
NSString *userName = [self.credentialsKeychainItem objectForKey:(__bridge id)(kSecAttrAccount)];
return (userName.length > 0) ? userName : @"";
}
- (NSString *)password {
NSData *password = [self.credentialsKeychainItem objectForKey:(__bridge id)(kSecValueData)];
if ([password isKindOfClass:[NSString class]] && password.length > 0) {
return (NSString *)password;
} else if ([password isKindOfClass:[NSData class]] && password.length > 0) {
NSString *passwordString = [[NSString alloc] initWithData:password encoding:NSUTF8StringEncoding];
return (passwordString.length > 0) ? password : @"";
} else {
return @"";
}
}
- (NSArray *)cookies {
NSLog(@"Getting cookies");
NSData *cookieData = [self.cookiesKeychainItem objectForKey:(__bridge id)(kSecAttrAccount)];
if ([cookieData isKindOfClass:[NSData class]] && cookieData.length > 0) {
NSArray *array = [NSKeyedUnarchiver unarchiveObjectWithData:cookieData];
NSLog(@"%lu cookies in keychain", (unsigned long)array.count);
return array;
} else {
NSLog(@"No cookies found in KeyChain");
return nil;
}
}
#pragma mark - Setter
- (void)setDomainName:(NSString *)domainName {
[self.credentialsKeychainItem setObject:domainName forKey:(__bridge id)(kSecAttrService)];
}
- (void)setUserName:(NSString *)userName {
[self.credentialsKeychainItem setObject:userName forKey:(__bridge id)(kSecAttrAccount)];
}
- (void)setPassword:(NSString *)password {
[self.credentialsKeychainItem setObject:password forKey:(__bridge id)(kSecValueData)];
}
- (void)setCookies:(NSArray *)cookies {
NSMutableArray *mutableCookies = [[NSMutableArray alloc] init];
for (NSHTTPCookie *cookie in cookies) {
NSLog(@"storing cookie: %@", cookie);
NSDictionary *cookieProperties = cookie.properties;
[mutableCookies addObject:cookieProperties];
}
NSArray *unmutableCookies = [mutableCookies copy];
NSData * encodedData = [NSKeyedArchiver archivedDataWithRootObject:unmutableCookies];
[self.cookiesKeychainItem setObject:encodedData forKey:(__bridge id)(kSecAttrAccount)];
}
# pragma mark - Clear data
- (void)clearAll {
[self clearCredentials];
[self clearCookies];
}
- (void)clearCredentials {
[self.credentialsKeychainItem resetKeychainItem];
}
- (void)clearCookies {
[self.cookiesKeychainItem resetKeychainItem];
}
@end
因此,症狀在於,獲取用戶名,密碼,域或cookie的功能在同一應用程序的不同目標之間都會產生不同的結果。
我發現了問題。 我必須在兩個目標的權限中設置鑰匙串共享。
有關如何設置此設置的指南,請參見:
http://evgenii.com/blog/sharing-keychain-in-ios/
然后,您必須將鑰匙串項目存儲在訪問組中。 當我嘗試這樣做時,當我想在鑰匙串中存儲某些東西時,KeychainItemWrapper出現了一些斷言失敗,然后我可以使用以下鏈接解決該問題: 指定訪問組時出現KeychainItemWrapper錯誤
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