我想向 mydatabase.sqlite 中插入一些数据,但我遇到了问题。插入数据时没有错误消息,但随后我打开数据库,但看不到任何数据。没有任何数据。
这是 MyClass 中的 addCoffee 方法:
if(addStmt == nil) {
const char *sql = "insert into records(Date, Latitude, Longitude) Values(?, ?, ?)";
if(sqlite3_prepare_v2(database, sql, -1, &addStmt, NULL) != SQLITE_OK)
NSAssert1(0, @"Error while creating add statement. '%s'", sqlite3_errmsg(database));
}
sqlite3_bind_text(addStmt, 1, [Date UTF8String], -1, SQLITE_TRANSIENT);
sqlite3_bind_double(addStmt, 2, [Latitude doubleValue] );
sqlite3_bind_double(addStmt, 3, [Longitude doubleValue] );
if(SQLITE_DONE != sqlite3_step(addStmt))
NSAssert1(0, @"Error while inserting data. '%s'", sqlite3_errmsg(database));
else
//SQLite provides a method to get the last primary key inserted by using sqlite3_last_insert_rowid
recordID = sqlite3_last_insert_rowid(database);
//Reset the add statement.
sqlite3_reset(addStmt);
发送数据:
iDailyAppDelegate *appDelegate = (iDailyAppDelegate *)[[UIApplication sharedApplication] delegate];
//Create a MyClass Object.
MyClass *coffeeObj = [[MyClass alloc] initWithPrimaryKey:0];
coffeeObj.Date = dateInString;
NSDecimalNumber *temp = [[NSDecimalNumber alloc] initWithString:first];
coffeeObj.Latitude = temp;
NSDecimalNumber *temp2 = [[NSDecimalNumber alloc] initWithString:second];
coffeeObj.Longitude = temp2;
[temp release];
coffeeObj.isDirty = NO;
coffeeObj.isDetailViewHydrated = YES;
//Add the object
[appDelegate addCoffee:coffeeObj];
最佳答案
- (void)inserting{
database=nil;
if (sqlite3_open([[DBAction getSqlitePath] UTF8String], &database) == SQLITE_OK){
const char *sql = [[NSString stringWithFormat:@"insert into SiteTable set Site_Address = '%@'",someString] UTF8String];
sqlite3_stmt *updateStmt = nil;
if(sqlite3_prepare_v2(database, sql, -1, &updateStmt, NULL) != SQLITE_OK)
{
//NSAssert1(0, @"Error while creating update statement. '%s'", sqlite3_errmsg(database));
}
if (SQLITE_DONE != sqlite3_step(updateStmt)){
//NSAssert1(0, @"Error while creating database. '%s'", sqlite3_errmsg(database));
}
sqlite3_reset(updateStmt);
sqlite3_finalize(updateStmt);
}
else{
//NSAssert1(0, @"Error while opening database '%s'", sqlite3_errmsg(database));
}
sqlite3_close(database);
}
关于objective-c - SQLite在 objective-c 中插入数据,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/7871816/