How can I use CGContextDrawTiledImage to tile an image?

Question

I want to be able to an UI object like a UIImageView and tile an image inside of it.

I have been able to use CGContextDrawTiledImage to update the background in the

Answer 1

I recently did this by creating a custom UIView.

@interface TiledImageView : UIView {
@private
    UIImage *image_;
}

@property (nonatomic, retain) UIImage *image;
@end

and for the .m file:

@implementation TiledImageView
@synthesize image = image_;

- (void)dealloc {
    [image_ release];
    [super dealloc];
}

- (id)initWithFrame:(CGRect)frame {
    if (self = [super initWithFrame:frame]) {
        // Initialization code
        self.image = [UIImage imageNamed:@"BGTile.png"];

    }
    return self;
}

- (void)drawRect:(CGRect)rect {
    // Drawing code
    CGImageRef image = CGImageRetain(image_.CGImage);

    CGRect imageRect;
    imageRect.origin = CGPointMake(0.0, 0.0);
    imageRect.size = CGSizeMake(CGImageGetWidth(image), CGImageGetHeight(image));

    CGContextRef context = UIGraphicsGetCurrentContext();   
    CGContextClipToRect(context, CGRectMake(0.0, 0.0, rect.size.width, rect.size.height));  
    CGContextDrawTiledImage(context, imageRect, image);
    CGImageRelease(image);
}

@end