For example, how can you implement storing the profile name and password so that you do not need to re-enter anything when you restart the program?

Closed due to the fact that the question is too general for the participants cheops , zRrr , user194374, Nick Volynkin ♦ 14 Jun '16 at 8:20 .

Please correct the question so that it describes the specific problem with sufficient detail to determine the appropriate answer. Do not ask a few questions at once. See “How to ask a good question?” For clarification. If the question can be reformulated according to the rules set out in the certificate , edit it .

  • The question is not very clear, add more information ... - Victor Mishustin

2 answers 2

A better solution would be to use CoreData https://habrahabr.ru/post/191472/ More simple through NSUserDefaults

Create 2 property @property (strong, nonatomic) NSString * email; @property (strong, nonatomic) NSString * password; @property (strong, nonatomic) NSString * email; @property (strong, nonatomic) NSString * password;

Record:

[[NSUserDefaults standardUserDefaults] setValue:self.email forKey:@"email"]; [[NSUserDefaults standardUserDefaults] setValue:self.password forKey:@"password"]; [[NSUserDefaults standardUserDefaults] synchronize];

Reading:

self.email = [[NSUserDefaults standardUserDefaults] stringForKey:@"email"]; self.password = [[NSUserDefaults standardUserDefaults] stringForKey:@"password"];

    There are many ways to store data between the launch of an application in iOS, it depends on the following transactions:

    1. Class singleton NSUserDefaults data storage in the form of a key-value. Convenient for simple types and data structures. Not safe, because All data is stored in the project directory, without encryption.
    2. Storing an object data model with encoding and decoding in NSKeyedArchiver / NSKeyedUnarchiver . Data model classes must comply with the NSCoding protocol. Simple to use, each class field will be stored with the appropriate key. Below is an example of storing data for a single AppUser class object:
     interface AppUser : NSObject @property(nonatomic, strong) NSString *email, *password, *aToken; @property(nonatomic, strong) NSMutableArray *organisations; @property(nonatomic) BOOL isLogin; +(AppUser *) sharedUser; -(BOOL) saveAppUsersData; -(void) logout; @end

    # define archivePath (name) [NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES) [0] stringByAppendingString: [[@ "/" stringByAppendingString: (name)] stringByAppendingString: @ ". archive"]]

     @implementation AppUser @synthesize password, email, isLogin, isAdmin, name, organisations, aToken; static AppUser *mSharedUser; +(AppUser *) sharedUser { @synchronized(self) { if (!mSharedUser) { mSharedUser = [NSKeyedUnarchiver unarchiveObjectWithFile:archivePath(@"AppUser")]; if (!mSharedUser) mSharedUser = [[self alloc] init]; } return mSharedUser; } } -(id) init { self = [super init]; if (self) { isLogin = NO; organisations = [NSMutableArray new]; } return self; } - (void)encodeWithCoder:(NSCoder *)aCoder { [aCoder encodeObject:email forKey:@"email"]; [aCoder encodeObject:password forKey:@"password"]; [aCoder encodeBool:isLogin forKey:@"isLogin"]; [aCoder encodeObject:aToken forKey:@"aToken"]; [aCoder encodeObject:organisations forKey:@"organisations"]; } - (id)initWithCoder:(NSCoder *)aDecoder { self = [super init]; if (self) { email = [aDecoder decodeObjectForKey:@"email"]; password = [aDecoder decodeObjectForKey:@"password"]; isLogin = [aDecoder decodeBoolForKey:@"isLogin"]; organisations = [aDecoder decodeObjectForKey:@"organisations"]; aToken = [aDecoder decodeObjectForKey:@"aToken"]; if (!organisations) organisations = [NSMutableArray new]; } return self; } -(BOOL) saveAppUsersData { return [NSKeyedArchiver archiveRootObject:[AppUser sharedUser] toFile:archivePath(@"AppUser")]; } -(void) logout { NSError *error; [[NSFileManager defaultManager] removeItemAtPath:archivePath(@"AppUser") error:&error]; mSharedUser = [[AppUser alloc] init]; }
    1. Base data SQLLite, CoreData, Realm. The main way to create storage, data models and queries for their selection. The fastest and most reliable way. Multithreading support.

    Realm is cross-platform and can be shared between iOS and Android. Regardless of whether you are working with Java, Objective-C, or Swift, you will use high-level models. https://realm.io