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POhow to get absolute last 7 days data, instead of last 7 records in SQLite iPhones
 

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  1. POhow to get absolute last 7 days data, instead of last 7 records in SQLite iPhones
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    <p>]i have this graph that shows the last 7 records from my sqlite database, it works.</p> <p>but i will like to know the absolute last 7 days.</p> <p><img src="https://i.stack.imgur.com/Uw3MS.png" alt="enter image description here"></p> <p>this is my codes</p> <pre><code>if ([appDelegate.drinksOnDayArray count] &gt;=7) { drunked = 7; } else { drunked = [appDelegate.drinksOnDayArray count]; } if (drunked !=0) { if (drunked&lt;7) { for (int i=drunked; i&lt;7; i++) { //DayOfDrinks *drinksOnDay = [appDelegate.drinksOnDayArray objectAtIndex:i-1]; NSString * dayString= [NSString stringWithFormat:@"Nil"];//[NSDate stringForDisplayFromDateForChart:drinksOnDay.dateConsumed]; [dayArray addObject:dayString];//X label for graph the day of drink. } } for(int i=drunked; i&gt;0; i--) { DayOfDrinks *drinksOnDay = [appDelegate.drinksOnDayArray objectAtIndex:i-1]; NSString * dayString= [NSDate stringForDisplayFromDateForChart:drinksOnDay.dateConsumed]; [dayArray addObject:dayString];//X label for graph the day of drink. drinksOnDay.isDetailViewHydrated = NO; [drinksOnDay hydrateDetailViewData]; NSNumber *sdNumber = drinksOnDay.standardDrinks; // pass value over to Standard Drink Numbers //[sdArray addObject: sdNumber]; float floatNum = [sdNumber floatValue]; // convert sdNumber to foat [sdArray addObject:[NSNumber numberWithFloat:floatNum]];//add float Value to sdArray } //Get max value using KVC fMax = [[sdArray valueForKeyPath:@"@max.floatValue"] floatValue]; //Ceiling the max value imax = (int)ceilf(fMax); //Odd check to make even by checking right most bit imax = (imax &amp; 0x1) ? imax + 1 : imax; NSMutableArray *array = [NSMutableArray arrayWithCapacity:(imax / 2) + 1]; //Assuming all numbers are positive for(int i = 0; i &lt;= imax; i +=2) { [array addObject:[NSString stringWithFormat:@"%d", i]]; } NSLog(@"Array Value %@", array); NSLog(@"Day Array%@", dayArray); NSString *sData[drunked];// = malloc(7 * sizeof(NSString *)); for (int i=0; i&lt;drunked; i++) { DayOfDrinks *drinksOnDay = [appDelegate.drinksOnDayArray objectAtIndex:i]; sData[i] = [NSString stringWithFormat:@"%@",drinksOnDay.standardDrinks]; } NSLog(@"sdArray %@",sdArray); if (drunked&lt;7) { for (int i=drunked; i&lt;7; i++) { sData[i]=[NSString stringWithFormat:@"0"]; } } </code></pre> <p>my sqlite statement</p> <pre><code>- (void) hydrateDetailViewData { //If the detail view is hydrated then do not get it from the database. if(isDetailViewHydrated) return; self.standardDrinks = [NSDecimalNumber zero]; NSDecimalNumber *decimal = [NSDecimalNumber zero]; if(detailStmt == nil) { const char *sql = "SELECT volume, percentage FROM consumed WHERE DATE(datetime) = ?"; if(sqlite3_prepare_v2(database, sql, -1, &amp;detailStmt, NULL) != SQLITE_OK) NSAssert1(0, @"Error while creating detail view statement. '%s'", sqlite3_errmsg(database)); } sqlite3_bind_text(detailStmt, 1, [[NSDate stringFromDate:self.dateConsumed withFormat:@"yyyy-MM-dd"] UTF8String], -1, SQLITE_TRANSIENT); static NSDecimalNumberHandler* roundingBehavior = nil; if (roundingBehavior == nil) { roundingBehavior = [[NSDecimalNumberHandler alloc] initWithRoundingMode:NSRoundPlain scale:1 raiseOnExactness:NO raiseOnOverflow:NO raiseOnUnderflow:NO raiseOnDivideByZero:NO]; } while(sqlite3_step(detailStmt) == SQLITE_ROW) { double volumeDN = sqlite3_column_double(detailStmt, 0); double percentageDN = sqlite3_column_double(detailStmt, 1); double drinks = ((volumeDN/1000) * percentageDN); NSDecimalNumber *drinksDec = [[NSDecimalNumber alloc] initWithDouble:drinks]; NSDecimalNumber *countryRate = [[NSDecimalNumber alloc] initWithDouble:0.789]; decimal = [decimal decimalNumberByAdding:[drinksDec decimalNumberByMultiplyingBy:countryRate]]; //NSLog([NSString stringWithFormat:@"Standard Drinks - %@", self.standardDrinks]); } self.standardDrinks = [decimal decimalNumberByRoundingAccordingToBehavior:roundingBehavior]; //Reset the detail statement so it can be used again without preparing the statement again. sqlite3_reset(detailStmt); //Set isDetailViewHydrated as YES, so we do not get it again from the database. isDetailViewHydrated = YES; } + (void) getInitialDataToDisplay:(NSString *)dbPath { DrinkTabsAndNavAppDelegate *appDelegate = (DrinkTabsAndNavAppDelegate *)[[UIApplication sharedApplication] delegate]; if (sqlite3_open([dbPath UTF8String], &amp;database) == SQLITE_OK) { const char *sql = "SELECT DATE(datetime) FROM consumed GROUP BY DATE(datetime) ORDER BY datetime DESC"; sqlite3_stmt *selectstmt; if(sqlite3_prepare_v2(database, sql, -1, &amp;selectstmt, NULL) == SQLITE_OK) { while(sqlite3_step(selectstmt) == SQLITE_ROW) { NSString *dateDrunk = [NSString stringWithUTF8String:(char *)sqlite3_column_text(selectstmt, 0)]; NSDate *theDate = [NSDate dateFromString:dateDrunk withFormat:@"yyyy-MM-dd"]; DayOfDrinks *drinkDayObj = [[DayOfDrinks alloc] initWithDateConsumed:theDate]; [drinkDayObj hydrateDetailViewData]; //NSLog([NSDate stringFromDate:drinkDayObj.dateConsumed withFormat:@"yyyy-MM-dd"]); [appDelegate.drinksOnDayArray addObject:drinkDayObj]; [drinkDayObj release]; } } } else sqlite3_close(database); //Even though the open call failed, close the database connection to release all the memory. </code></pre> <p>}</p>
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