realm database ios

:@"SearchText"]; [Searchtests Addobject:result]; } returnsearchtests;}//Delete all search Records-(BOOL) deleteallsearchtext{nsstring*sql =@"DELETE from T_history"; BOOL Isdeletesuc=[_fmdatabase Executeupdate:sql]; if(ISDELETESUC) {NSLog (@"Delete succeeded"); returnYES; } returnNO;}@endAttention If the ID is set to gradual and is set to autogrow, then after deleting the data in the table, reinsert the new data, the ID number is not starting from 0, but the previous ID is numbe

Release the open source code for the previous period:ArdbconfigOn the IOS, provide a database table structure update mechanism, ensure that the user in any version of the installer, the Database structure to ensure adapter.(on iOS, a mechanism for updating the database table

IOS database SQLiteSQLite is a lightweight embedded database. Android and iOS use SQLite databases. Its features: it occupies very low resources. In embedded devices, it may only require several hundred KB of memory. It processes faster than MySQL and PostgreSQL, two famous databases. It is a C language framework with

In the development of iOS, often encounter database upgrade, modify some fields of delete table, this need us to deal with, the following analysis two kinds of database upgrade processing problem!1. For example: We often use fmdb or other ways to create SQLite database, but because of the version iteration problem, oft

I was going to write a gae+goagent+switchysharp guide today! But then suddenly out of the previous period of time to write about the SQL database files in iOS encryption code, so decided to talk about this today! ~ So Goagent will be on weekends, in addition to file encryption in subsequent articles, as well as the transmission of data encryption, interested in children's shoes please note. To start with,

In iOS development, databases are saved normally. However, if the objects to be saved are not all of the basic data types or are not supported by the database, is it instantly petrochemical. For example: A message object contains an attatchment object. It is required that each message be saved. It is normal to select the SQLite database to save it (I use it anywa

CoreData Database Introduction CoreData IntroductionCoreDatais a powerful data persistence technology located on the SQLite database, which avoids the complexity of SQL and allows us to interact with the database in a more natural way. CoreData provides data –oc object mapping relationships for data and object management so that you can manipulate them without an

Php receives emoji expressions in ios and saves them to the database ????. Php receives emoji expressions in ios and saves them to the database ????. According to the Internet, the database code is changed to utf8mb4. the database

(@ "Backupdbpath =%@", Backupdbpath); if (CP) {Nserror *error; Here the verification program runs, after copy succeeds, delete the file in mainbundle BOOL BL = [FM Removeitematpath:backupdbpath error:error]; }} NSLog (@ "Isexist =%d", isexist);}Following the success of the copy file, delete the source file under the main bundle is feasibleif it is under the simulator, you can run the discovery is possible! This does not mean that it is feasible on the real machine. After the r

A simple explanationTo use SQLite3 in iOS, first add the library file Libsqlite3.dylib and import the primary header file.　　Import header file, you can use the function in the library (pure C language)Ii. Specific InstructionsCreate a new project and place four buttons (add, delete, modify, query) in the main interface of the project.1.sqlite3_open ((1) Function: Pass a file name to him, it will automatically detect whether the file exists, if not, it

Php reads data from the database and sends it to ios through json. I read the data from the database in php, put the read data into a json string, and then send it to ios, however, I found that all the read data has changed to 1, and then I checked on the php end whether the value of one of the queries is a string that

[IOS] Database third-party framework Fmdb A detailed explanation of the initial knowledge FmdbiOS native SQLite API in the data storage, need to use the C language functions, the operation is more troublesome. As a result, a series of libraries that encapsulate the SQLite API, such as,,, and so on, appear FMDB PlausibleDatabase sqlitepersistentobjects . The Fmdb is a simple, easy-to-use package lib

Use SQLite in iOS to process data. If you already know about SQL, you can easily master the operation of the SQLite database. iOS for database operations: Add, delete, find, modify the details are as follows: First you need to create a database: The

iOS Development Database Chapter-fmdb Brief IntroductionA simple explanation1. What is FmdbFmdb is the SQLite database framework for the iOS platformFmdb encapsulates the C language API of SQLite in OC modeAdvantages of 2.FMDBUse more object-oriented, save a lot of cumbersome, redundant C language codeMore lightweight

1. What is Fmdb?Fmdb is a SQLite database under the iOS platform, except that it is an OC-style SQLite statement that encapsulates the C language and is used more object-orientedAdvantages of 2.FMDB: 1. Use more object-oriented; 2. Compared with Apple's own Core data management tool is more lightweight, more flexible, and fmdb support cross-platform; 3. Provide multi-thread data security protection mechanis

Open-source code for an iOS database table structure update mechanism Release the open-source code some time ago: ARDBConfigOn the iOS, provide a database table structure update mechanisms, ensure that the user in any version of the installer, the database structure to ensur

There are many ways to save data, such as plist files, XML, or text files, but the efficiency is not high. SQLite provides local storage for efficient query and retrieval of big data. SQLite is an open source library, written in C, that implements a self-contained SQL relational database engine. you can use SQLite to store large amounts of relational data. the developers of SQLite have optimized it for use on embedded devices like the iPhone and iPad.

close]; Update//Open database if (![ DB Open]) {[db close]; Return }//Set cache [db Setshouldcachestatements:yes]; Perform update [DB executeupdate:@] Update people SET Peoplename =? WHERE peopleid=? ", @" Stone ", [NSNumber Numberwithint:_peopleid]]; [DB close]; Update ui//Open Database if (![ DB Open]) {[db close]; Return }//Set cache [db Setshould

I read the database on the PHP side, put the read data into a JSON-formatted string, and then sent to the iOS, but found that the data read all become 1, and then I in the PHP side to determine whether the value of one of the query is a string I know, if the same, Just assign the string to it and pass it back to the normal string. Reply to discussion (solution) Don't understand, what kind of data has be

IOS local project dependencies (CocoaPods local database management), ioscocoapods IOS local dependencies are actually troublesome, and static libraries are used. a and. framework, but when you use a static library to access the static library, your program will report an error, and version management is troublesome. Then we thought of using cocoapods as the depe