NSMutableArray losing all of its objects - ios

Question

I am making a function which allows you to read from a database and then puts the data into a NSMutableArray which it later returns for the user. Though for some reason when it is about to return the data the data is deleted from the array. Here is the code for the function:
+(NSMutableArray *) readFromDataBaseWithName:(NSString *)name withSqlStatement:(NSString *)sql {
sqlite3 *database;
NSMutableArray *rtn = [[NSMutableArray alloc] init];
NSMutableArray *new = [[NSMutableArray alloc] init];
int index = 0;
NSString *filePath = [self copyDatabaseToDocumentsWithName:name];
if (sqlite3_open([filePath UTF8String], &database) == SQLITE_OK) {
const char *sqlStateMent = [sql cStringUsingEncoding:NSASCIIStringEncoding];
sqlite3_stmt *compiledStatement;
if (sqlite3_prepare(database, sqlStateMent, -1, &compiledStatement, NULL) == SQLITE_OK) {
while (sqlite3_step(compiledStatement) == SQLITE_ROW) {
// loop through elements in row and put them into array
const char *s = (char *)sqlite3_column_text(compiledStatement, index);
while (s) {
[new addObject:[NSString stringWithUTF8String:s]];
index++;
s = (char *)sqlite3_column_text(compiledStatement, index);
}
[rtn addObject:new];
[new removeAllObjects];
}
}
sqlite3_finalize(compiledStatement);
}
sqlite3_close(database);
return rtn;
}
Any advice would be much appreciated.

Answer 1

You keep reusing new. You need to create individual arrays each time.
+(NSMutableArray *) readFromDataBaseWithName:(NSString *)name withSqlStatement:(NSString *)sql {
sqlite3 *database;
NSMutableArray *rtn = [[NSMutableArray alloc] init];
int index = 0;
NSString *filePath = [self copyDatabaseToDocumentsWithName:name];
if (sqlite3_open([filePath UTF8String], &database) == SQLITE_OK) {
const char *sqlStateMent = [sql cStringUsingEncoding:NSASCIIStringEncoding];
sqlite3_stmt *compiledStatement;
if (sqlite3_prepare(database, sqlStateMent, -1, &compiledStatement, NULL) == SQLITE_OK) {
while (sqlite3_step(compiledStatement) == SQLITE_ROW) {
// loop through elements in row and put them into array
NSMutableArray *new = [[NSMutableArray alloc] init];
const char *s = (char *)sqlite3_column_text(compiledStatement, index);
while (s) {
[new addObject:[NSString stringWithUTF8String:s]];
index++;
s = (char *)sqlite3_column_text(compiledStatement, index);
}
[rtn addObject:new];
}
}
sqlite3_finalize(compiledStatement);
}
sqlite3_close(database);
return rtn;
}