我有以下代码:问题的SQL语句
if(sqlite3_open([databasePath UTF8String], &database) == SQLITE_OK)
{
// Setup the SQL Statement and compile it for faster access
const char *sqlStatement = "select ZWAYPOINT_X, ZWAYPOINT_Y from ZWAYPOINT where ZMAP_ID %@", mapID;
sqlite3_stmt *compiledStatement;
if(sqlite3_prepare_v2(database, sqlStatement, -1, &compiledStatement, NULL) == SQLITE_OK)
{
// Loop through the results and add them to the Route Name array
while(sqlite3_step(compiledStatement) == SQLITE_ROW)
{
// Read the data from the result row
if((char*)sqlite3_column_text(compiledStatement, 0) != NULL)
{
NSString *xCoordinate = [NSString stringWithUTF8String:(char*)sqlite3_column_text(compiledStatement, 0)];
NSString *yCoordinate = [NSString stringWithUTF8String:(char*)sqlite3_column_text(compiledStatement, 1)];
NSLog(@"xCoordinate: %@", xCoordinate);
NSLog(@"yCoordinate: %@", yCoordinate);
CLLocationCoordinate2D coordinate = {xCoordinate, yCoordinate};
MapPin *pin = [[MapPin alloc]initWithCoordinates:coordinate
placeName:@"Keenan Stadium"
description:@"Tar Heel Football"];
[self.mapView addAnnotation:pin];
[pin release];
}
}
}
else
{
NSLog(@"Error: failed to select details from database with message '%s'.", sqlite3_errmsg(database));
}
我有几个问题:
- 在我的SQL语句我怎么包括可变的azazaz作为SQL语句 的一部分
该行
CLLocationCoordinate2D coordinate = {xCoordinate,yCoordinate};
给了我下面的警告 “不兼容类型的初始化”
感谢
您可以通过移动到核心数据解决您的SQL语句的问题;) – jer 2010-07-20 13:31:45
耶,有趣的是我见过几个人建议这个时候关于SQL的问题张贴。我现在承诺虽然....我肯定会审查核心数据后,我有这个程序完成。感谢您的建议。 – Stephen 2010-07-20 13:53:47
这不是SQL语句,它是程序代码。 – onedaywhen 2010-07-20 14:40:25