Add image on top of UIImage

Question

I am trying to add a image banner on top of a UIImage before saving it. I have created this category method to do so. I have checked and rechecked that banner.png exists and the gradient shows up fine.

What am I doing wrong?

Thanks in advance!

- (UIImage *)addBanner {
     UIGraphicsBeginImageContext(CGSizeMake(self.size.width, self.size.height+50));
     [self drawAtPoint:CGPointMake(0, 50)];
     CGContextRef context = UIGraphicsGetCurrentContext();
     CGRect bannerRect = CGRectMake(0, 0, self.size.width, 50);
     CGColorRef start = RGB(71, 174, 255).CGColor;
     CGColorRef end = RGB(0, 80, 255).CGColor;
     drawLinearGradient(context, bannerRect, start, end);
     UIImage *bannerImage = [UIImage imageWithContentsOfFile:@"banner.png"];
     [bannerImage drawAtPoint:CGPointMake(0, 0)];
     UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
     UIGraphicsEndImageContext();
     return newImage;
}

I get my image with the banner gradient on top but my bannerImage isn't showing. — enbr, Oct 08 '11 at 15:29
It turns out that bannerImage is nil so that is causing my problem. I am absolutely positive that it is in the app bundle though. — enbr, Oct 08 '11 at 15:44
possible duplicate of [add Uiimage on top of another Uiimage](http://stackoverflow.com/questions/10523122/add-uiimage-on-top-of-another-uiimage) — Richard Stelling, Aug 11 '15 at 14:55

score 1 · Answer 1 · answered Oct 08 '11 at 15:56

1

Apparently [UIImage imageWithContentsOfFile:] requires a full path. Changing it to [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"banner.png"]] worked.

answered Oct 08 '11 at 15:56

enbr

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Or, depending on how you'll use the image, `[UIImage imageNamed:@"banner"]`. See [the docs](http://developer.apple.com/library/ios/documentation/UIKit/Reference/UIImage_Class/Reference/Reference.html#//apple_ref/occ/clm/UIImage/imageNamed:) for details. – Peter Hosey Oct 08 '11 at 16:55

score 0 · Answer 2 · answered Oct 08 '11 at 09:43

0

Please refer Combining Images with UIImage & CGContext – (Offscreen drawing)

answered Oct 08 '11 at 09:43

Dilip Rajkumar

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If I understand what you're saying, I tried to run this outside of my category and got the same results. Please read the issue description before providing cookie cutter responses. – enbr Oct 08 '11 at 15:38

Add image on top of UIImage

2 Answers2