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我正在構建應用程序，其中人們需要能夠從iOS照片應用程序共享照片。要做到這一點，人們需要登錄到應用程序。iOS KeyChain項目未在應用程序的多個目標之間更新
所以我創建了一個新的iOS目標共享。 現在我正在使用KeychainItemWrapper來存儲用戶憑證。 因此，主要目標和共享表目標都使用iOS Keychain來檢索登錄信息。
現在，當我從主應用程序註銷，然後以其他用戶身份登錄後，我開始分享表單，看起來分享表仍然包含上一位用戶的舊數據。
這怎麼可能？我如何確保兩個目標始終使用鑰匙串中最新最好的數據？
#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
所以症狀的函數來獲取用戶名，密碼，域或餅乾都給同一應用程序的不同目標之間不同的結果。