更新iPhone SQLite数据库
我想使用SQLite更新查询来更新iPhone中的数据库更新iPhone SQLite数据库,iphone,sql,sqlite,sql-update,Iphone,Sql,Sqlite,Sql Update,我想使用SQLite更新查询来更新iPhone中的数据库 有谁能提供代码给我如何做到这一点吗?给定一个已经打开的数据库: + (BOOL)UpDateGetAvailableContentObjects:(NSMutableDictionary*)availableReportsDict { //The following two lines of code are sure to be called because this method has to be called.
有谁能提供代码给我如何做到这一点吗?给定一个已经打开的数据库:
+ (BOOL)UpDateGetAvailableContentObjects:(NSMutableDictionary*)availableReportsDict
{
//The following two lines of code are sure to be called because this method has to be called.
//So these two lines will set the static database variable for use in future as well in add, delete, update functions.
htmlReportAppDelegate *appDelegate = (htmlReportAppDelegate *)
[[UIApplication sharedApplication] delegate];
database = appDelegate.database;
const char *sqlStatement = "insert into
GetAvailableContentObjectsTable(contentID,id,lastUpdate,name,typeid,subpages) Values(?,?,?,?,?,?)";
int success;
if(sqlite3_prepare_v2(database, sqlStatement, -1, &get_statement, NULL) == SQLITE_OK)
{
sqlite3_bind_text(get_statement, 1, [[availableReportsDict valueForKey:@"pages"] UTF8String], -1, SQLITE_TRANSIENT);
sqlite3_bind_text(get_statement, 2, [[availableReportsDict valueForKey:@"id"] UTF8String], -1, SQLITE_TRANSIENT);
sqlite3_bind_text(get_statement, 3, [[availableReportsDict valueForKey:@"lastUpdate"] UTF8String], -1, SQLITE_TRANSIENT);
sqlite3_bind_text(get_statement, 4, [[availableReportsDict valueForKey:@"name"] UTF8String], -1, SQLITE_TRANSIENT);
sqlite3_bind_int(get_statement, 5, [[availableReportsDict valueForKey:@"typeid"]intValue]);
sqlite3_bind_int(get_statement, 6, [[availableReportsDict valueForKey:@"subpages"]intValue]);
success = sqlite3_step(get_statement);
if (success == SQLITE_ERROR) {
NSAssert1(0, @"Error: failed to insert into the database with message '%s'.", sqlite3_errmsg(database));
}
}
else {
NSAssert1(0, @"Error: failed to prepare statement with message '%s'.", sqlite3_errmsg(database));
}
// Release the compiled statement from memory
sqlite3_finalize(get_statement);
get_statement = nil;
return success;
}
static sqlite3_stmt *update_progress_statement = nil;
- (void) setProgress:(int)newProgress forKey:(int)key {
if (update_progress_statement == nil) {
const char *sql = "UPDATE progress SET value = ? WHERE key = ?";
if (sqlite3_prepare_v2(database, sql, -1, &update_progress_statement, NULL) != SQLITE_OK) {
NSLog(@"Error: failed to prepare update_progress_statement with message '%s'.",sqlite3_errmsg(database));
return;
}
}
sqlite3_bind_int(update_progress_statement, 1, newProgress);
sqlite3_bind_int(update_progress_statement, 2, key);
int success = sqlite3_step(update_progress_statement);
if (success == SQLITE_ERROR){
NSLog(@"Error: failed to update update_progress_statement with message '%s'.", sqlite3_errmsg(database));
}
sqlite3_reset(update_progress_statement);
}
谢谢Vincent,当我更改TextFiedld中的数据并希望使用您的代码进行更新时,您是否可以让我知道如何使用它来更新字段。如何做到……请帮助我……我是否需要创建一本词典,或者只需向我提供全部代码,或者您甚至可以通过电子邮件发送给我sabby3861@rediff.com