我无法将值插入到sqlite db

Question

我使用下面的代码将代码插入数据库。这些数据被“:::”分割并且被分割的这些值被添加到数据库中。当我检查了数据库，数据不是SQLite中添加

#pragma mark - Web View Delegate 
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType { 
    NSString *strResponse = [[request URL] absoluteString]; 
    if ([strResponse hasPrefix:@"ios:"]) { 

     NSString *newString = [strResponse substringFromIndex:[@"ios:" length]]; 
     newString = [newString stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding]; 

     UIAlertView *uiAlert = [[UIAlertView alloc] initWithTitle:@"Message" message:newString delegate:self cancelButtonTitle:@"No" otherButtonTitles:@"Yes", nil]; 
     [uiAlert show]; 

     NSArray *arrItems = [newString componentsSeparatedByString:@":::"]; 
     for (NSString *strItems in arrItems) { 

      [strItems stringByRemovingPercentEncoding]; 
      NSMutableDictionary *mDic = [[NSMutableDictionary alloc] init]; 
      [mDic setObject:strItems forKey:@"item_name"]; 
      [mDic setObject:@"0" forKey:@"is_deleted"]; 
      [[DataBase connection] insertTableData:mDic AndTableName:@"school_feed"]; 
     } 

     return NO; 
    } 
    return YES; 
} 

插入表格数据的方法

- (void)insertTableData:(NSMutableDictionary *)mDictDetails AndTableName:(NSString*)table_name { 
    NSArray *arrAllKey = [mDictDetails allKeys]; 

    NSString *key = @""; 
    NSString *values = @""; 

    for (NSInteger i = 0; i <arrAllKey.count ; i++) { 

     NSString *column = arrAllKey[i]; 
     if ([key isEqualToString:@""]) { 
      key = column; 
      values = @"?"; 
     } else { 
      key = [key stringByAppendingString:[NSString stringWithFormat:@",%@", column]]; 
      values = [values stringByAppendingString:@", ?"]; 
     } 
    } 

    NSString *query = [NSString stringWithFormat: @"INSERT OR REPLACE INTO %@ (%@) values(%@)", table_name, key, values]; 
    const char *sql = [query UTF8String]; 

    sqlite3_stmt *insertStatement; // statement created 

    if (sqlite3_prepare_v2(database, sql, -1, &insertStatement, NULL) != SQLITE_OK) { 
     NSAssert1(0, @"Error: failed to prepare statement with message '%s'.", sqlite3_errmsg(database)); 
    }// if 

    for (int i = 0; i <arrAllKey.count; i++) { 
     NSString *column = arrAllKey[i]; 
     NSString *strKeys = [NSString stringWithFormat:@"%@", [mDictDetails objectForKey:column]]; 
     sqlite3_bind_text(insertStatement, i + 1, [strKeys UTF8String], -1, SQLITE_TRANSIENT); 
    } 

    sqlite3_step(insertStatement);// executing query 
    sqlite3_finalize(insertStatement); // finalizing statement 
} 

Answer 1

试试这个：

static sqlite3 *database = nil; 
static sqlite3 *contactDB; 

创建数据库

- (void)viewDidLoad 
{ 

     NSString *docsDir; 
     NSArray *dirPaths; 
     // Get the documents directory 
     dirPaths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES); 
     docsDir = dirPaths[0]; 

     // Build the path to the database file 
     databasePath = [[NSString alloc] initWithString:[docsDir stringByAppendingPathComponent: @"student.db"]]; 

     NSLog(@"Database Path: %@",databasePath); 


     NSFileManager *filemgr = [NSFileManager defaultManager]; 
     if ([filemgr fileExistsAtPath: databasePath ] == NO) 
     { 
      const char *dbpath = [databasePath UTF8String]; 
      if (sqlite3_open(dbpath, &database) == SQLITE_OK) 
      { 
       char *errMsg; 
       const char *sql_stmt ="create table if not exists studentsDetail (regno integer primary key, name text, department text, year text)"; 
       if (sqlite3_exec(database, sql_stmt, NULL, NULL, &errMsg) 
        != SQLITE_OK) 
       { 
        NSLog(@"Failed to create table"); 
       } 
       sqlite3_close(database); 
      } 
      else { 

       NSLog(@"Failed to open/create database"); 
      } 
     } 
     /*End Databse creation*/ 
} 

保存数据：对于`

- (IBAction)saveData:(id)sender 
    { 
     //regNoTextField,nameTextField,departmentTextField,yearTextField 

     NSString *num= regNoTextField.text; 
     int value = [num intValue]; 

     NSString *name= nameTextField.text; 
     NSString *dep=departmentTextField.text; 
     NSString *year=yearTextField.text; 

     /* NSLog(@"no : %d",value); 
     NSLog(@"name : %@",name); 
     NSLog(@"depa : %@",dep); 
     NSLog(@"year : %@",year); 
     */ 

     sqlite3_stmt *statement = nil; 
     const char *dbpath = [databasePath UTF8String]; 


     if (regNoTextField.text.length>0 &&nameTextField.text.length>0 && 
      departmentTextField.text.length>0 &&yearTextField.text.length>0) 
     { 
      if (sqlite3_open(dbpath, &contactDB) == SQLITE_OK) 
      { 
      NSString *insertSQL = [NSString stringWithFormat:@"insert into studentsDetail (regno,name, department, year) values(\"%d\",\"%@\", \"%@\", \"%@\")",value,name, dep, year]; 


       const char *insert_stmt = [insertSQL UTF8String]; 
       sqlite3_prepare_v2(contactDB, insert_stmt,-1, &statement, NULL); 

       if (sqlite3_step(statement) == SQLITE_DONE) 
       { 

        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Student Detail" message:@"Save Data" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil]; 

        [alertView show]; 
       } 
       else 
       { 
        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Student Detail" message:@"Unsuccessfull Save" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil]; 

        [alertView show]; 
       } 
       sqlite3_finalize(statement); 
       sqlite3_close(contactDB); 
      } 
     } 
     else 
     { 
      UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Student Detail" message:@"Plese Entre Textfield Data" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil]; 

      [alertView show]; 

     } 
    }