Drawing NSString in CGRect - iphone

Question

I'm trying to draw a NSString at the bottom of my CGRect. So far I've been able to have the text to be at the top centered but I need it to be positioned at the bottom. I also tried DrawAtPoint but that didn't work. Here's my code that I currently have:
UIGraphicsBeginImageContext(img.size);
CGRect aRectangle = CGRectMake(0,0, img.size.width, img.size.height);
[img drawInRect:aRectangle];
[[UIColor whiteColor] set];
NSInteger fontSize = 25;
UIFont *font = [UIFont boldSystemFontOfSize: fontSize];
[text drawInRect:aRectangle withFont:font lineBreakMode:NSLineBreakByWordWrapping alignment:NSTextAlignmentCenter];
UIImage *theImage=UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

Answer 1

you can use the method:
sizeWithFont:constrainedToSize:lineBreakMode
get the text size, then calculate the left top point and use drawAtPoint to draw the text

Answer 2

Use this method:
-(UIImage *)imageFromText:(NSString *)text
{
CGSize maximumSize = CGSizeMake(300, 1000); //set width for string to wrap.
UIFont *font = [UIFont boldSystemFontOfSize:16];
CGSize strSize = [text sizeWithFont:font constrainedToSize:maximumSize lineBreakMode:UILineBreakModeWordWrap];
if (UIGraphicsBeginImageContextWithOptions != NULL)
UIGraphicsBeginImageContextWithOptions(strSize,NO,0.0);
else
// iOS is < 4.0
UIGraphicsBeginImageContext(strSize);
CGRect newframe = CGRectMake(0, 0, strSize.width, strSize.height);
[text drawInRect:newframe
withFont:font
lineBreakMode:UILineBreakModeWordWrap
alignment:UITextAlignmentLeft];
UIImage *testImg = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return testImg;
}

Answer 3

I found out that this code helped my problem extremely.
- (UIImage *)addText:(UIImage *)img text:(NSString *)text1{
int w = img.size.width;
int h = img.size.height;
//lon = h - lon;
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
CGContextRef context = CGBitmapContextCreate(NULL, w, h, 8, 4 * w, colorSpace, kCGImageAlphaPremultipliedFirst);
CGContextDrawImage(context, CGRectMake(0, 0, w, h), img.CGImage);
CGContextSetRGBFillColor(context, 0.0, 0.0, 1.0, 1);
char* text = (char *)[text1 cStringUsingEncoding:NSASCIIStringEncoding];// "05/05/09";
CGContextSelectFont(context, "Arial", 18, kCGEncodingMacRoman);
CGContextSetTextDrawingMode(context, kCGTextFill);
CGContextSetRGBFillColor(context, 255, 255, 255, 1);
//rotate text
CGContextShowTextAtPoint(context, 0, 5, text, strlen(text));
CGImageRef imageMasked = CGBitmapContextCreateImage(context);
CGContextRelease(context);
CGColorSpaceRelease(colorSpace);
return [UIImage imageWithCGImage:imageMasked];
}