How to set RGB color from database - iphone

Question

I'm new in iphone development.i want to set uilabel's background color from the database..i already stored RGB color into the database.but i'm not getting the background color.
const char *dbpath = [database_Path UTF8String];
sqlite3_stmt *statement;
[category_array removeAllObjects];
[category_arrDictionary removeAllObjects];
if (sqlite3_open(dbpath, &Payer_DB) == SQLITE_OK)
{
NSString *querySQL = [NSString stringWithFormat:#"SELECT * FROM Expense_Category"];
const char *query_stmt = [querySQL UTF8String];
if (sqlite3_prepare_v2(Payer_DB,query_stmt, -1, &statement, NULL) == SQLITE_OK)
{
while (sqlite3_step(statement) == SQLITE_ROW)
{
// NSLog(#"%i",SQLITE_ROW);
NSMutableString *Category_Id = [[NSMutableString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 0)];
NSMutableString *Category_Name = [[NSMutableString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 1)];
NSMutableString *Category_Image = [[NSMutableString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 2)];
NSMutableString *Category_Color = [[NSMutableString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 3)];
NSLog(#"%#",Category_Color);
[category_arrDictionary setObject:[NSMutableArray arrayWithObjects:Category_Name,Category_Image,Category_Color,nil] forKey:Category_Id];
[category_array addObject:Category_Id];
}
}
else {
NSLog(#"Value updated");
}
sqlite3_finalize(statement);
sqlite3_close(Payer_DB);
}
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UILabel *lblCatColor = [[UILabel alloc] initWithFrame:CGRectMake(230,10, 70, 40)];
[lblCatColor setBackgroundColor:[[category_arrDictionary valueForKey:[category_array objectAtIndex:indexPath.row]] objectAtIndex:3]];
//lblCatColor.text = [[category_arrDictionary valueForKey:[category_array objectAtIndex:indexPath.row]] objectAtIndex:3];
[cell.contentView addSubview:lblCatColor];
return cell;
}

Answer 1

try this
NSString *strflg=[[category_arrDictionary valueForKey:[category_array objectAtIndex:indexPath.row]] objectAtIndex:3]];
NSArray *colorArray=[strflg componentsSeparatedByString:#","];
float red;
float green;
float blue;
for (int j=0;j<[colorArray count]; j++) {
if (j==0) {
red=[[colorArray objectAtIndex:j] floatValue];
}
else if (j==1)
{
green=[[colorArray objectAtIndex:j] floatValue];
}
else{
blue=[[colorArray objectAtIndex:j] floatValue];
}
}
[lblCatColor setBackgroundColor:[UIColor colorWithRed:red/255.0f green:green/255.0f blue:blue/255.0f alpha:1.0]];

Answer 2

You need to write a small method to parse the string you're extracting from the DB and create a UIColor from it. You can't directly set the color of the label using a string.

Answer 3

its may help you
NSString *strflg=[[category_arrDictionary valueForKey:[category_array objectAtIndex:indexPath.row]] objectAtIndex:3]];
NSArray *colorArray=[strflg componentsSeparatedByString:#","];
[lblCatColor setBackgroundColor:[UIColor colorWithRed:[[colorArray objectAtIndex:0] floatValue]/255.0f green:[[colorArray objectAtIndex:1] floatValue]/255.0f blue:[[colorArray objectAtIndex:2] floatValue]/255.0f alpha:1.0]];

Answer 4

Please try to use this one.
Your dictionary will give you a string and after that you should seperate your component and then put your red,green and blue value on the place of red,green and blue variable.
[lblCatColor setBackgroundColor:[UIColor colorWithRed:red/255.0f green:green/255.0f blue:blue/255.0f alpha:1.0f]];

Answer 5

[[category_arrDictionary valueForKey:[category_array objectAtIndex:indexPath.row]] objectAtIndex:3] returns NSString like 199.0,21.0,133.0.
The following code will help you...
NSString *colorFormat = [[category_arrDictionary valueForKey:[category_array objectAtIndex:indexPath.row]] objectAtIndex:3];
NSArray *colorArr = [[colorFormat componentsSeparatedByString:#","];
float red = [[colorArr objectAtIndex:0]floatValue];
float green = [[colorArr objectAtIndex:1]floatValue];
float blue = [[colorArr objectAtIndex:2]floatValue];
[lblCatColor setBackgroundColor:[UIColor colorWithRed:(red/255.0) green:(green/255.0) blue:(blue/255.0) alpha:1.0]];

Answer 6

Use following code snippet to create UIColor from NSString
NSString *rgbstr = #"123.0,104.0,238.0";
NSArray *arrRGB = [rgbstr componentsSeparatedByString:#","];
UIColor *color = [UIColor colorWithRed:[arrRGB[0] floatValue]/255.0f green:[arrRGB[1] floatValue]/255.0f blue:[arrRGB[2] floatValue]/255.0f alpha:1.0f];