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POhow to repeat only part of an image?
 

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    <p>how to repeat only part of an image,</p> <p>there are two images.</p> <p><em>i.stack.imgur.com/KC0Pm.png</em></p> <p>the source pic is something like the above and i want to change it to:</p> <p><em>i.stack.imgur.com/t8CwQ.png</em></p> <p>this means i just want to repeat only part of the image? not stretch the source pic, is it possible to do that? </p> <p>thanks <strong>Update:</strong></p> <p>CODE HERE : <a href="http://www.box.net/shared/cmtz0e48a5urtajxu4yn" rel="nofollow">http://www.box.net/shared/cmtz0e48a5urtajxu4yn</a> still have problem!!</p> <p><strong>Update:</strong> i crop my image file and just repeat the part,but i still have some problem.</p> <pre><code>- (UIImage *)imageWithImage:(NSString *)iconName covertToSize:(CGSize)size { CGRect topLeft,topRight,bottomLeft,bottomRight,top,bottom,left,right; if ([iconName isEqualToString:@"border_baikuang"]) { topLeft = CGRectMake(0, 0, 18, 18); topRight = CGRectMake(108-18, 0, 18, 18); bottomLeft = CGRectMake(0, 104-18, 18, 18); bottomRight = CGRectMake(108-18, 104-18, 18, 18); top = CGRectMake(18, 0, 1, 18); bottom = CGRectMake(18, 104-18, 1, 18); left = CGRectMake(0, 18, 18, 1); right = CGRectMake(108-18, 18, 18, 1); } else if ([iconName isEqualToString:@"border_fuguxiangkuang"]) { topLeft = CGRectMake(0, 0, 28, 28); topRight = CGRectMake(108-28, 0, 28, 28); bottomLeft = CGRectMake(0, 104-28, 28, 28); bottomRight = CGRectMake(108-28, 104-28, 28, 28); top = CGRectMake(28, 0, 28, 24); bottom = CGRectMake(28, 104-28, 28, 24); left = CGRectMake(0, 28, 24, 28); right = CGRectMake(108-24, 28, 24, 28); } float width = size.width; float height = size.height; UIGraphicsBeginImageContext(size); // UIImage *topLeftPattern = [self fetchImgWithSrc:iconName rect:topLeft]; [topLeftPattern drawInRect:CGRectMake(0, 0, topLeftPattern.size.width, topLeftPattern.size.height)]; UIImage *topRightPattern = [self fetchImgWithSrc:iconName rect:topRight]; [topRightPattern drawInRect:CGRectMake(width-topRightPattern.size.width, 0, topRightPattern.size.width, topRightPattern.size.height)]; UIImage *bottomLeftPattern = [self fetchImgWithSrc:iconName rect:bottomLeft]; [bottomLeftPattern drawInRect:CGRectMake(0, height-bottomLeftPattern.size.height, bottomLeftPattern.size.width, bottomLeftPattern.size.height)]; UIImage *bottomRightPattern = [self fetchImgWithSrc:iconName rect:bottomRight]; [bottomRightPattern drawInRect:CGRectMake(width-bottomRightPattern.size.width, height-bottomRightPattern.size.height, bottomRightPattern.size.width, bottomRightPattern.size.height)]; UIImage *topPattern = [self fetchImgWithSrc:iconName rect:top]; [topPattern drawAsPatternInRect:CGRectMake(topLeftPattern.size.width, 0, width-topRightPattern.size.width-topLeftPattern.size.width, topPattern.size.height)]; UIImage *bottomPattern = [self fetchImgWithSrc:iconName rect:bottom]; [bottomPattern drawAsPatternInRect:CGRectMake(bottomLeftPattern.size.width, height-bottomLeftPattern.size.height, width-bottomRightPattern.size.width-bottomLeftPattern.size.width, bottomPattern.size.height)]; UIImage *leftPattern = [self fetchImgWithSrc:iconName rect:left]; [leftPattern drawAsPatternInRect:CGRectMake(0, topLeftPattern.size.height, leftPattern.size.width, height-bottomLeftPattern.size.height-topLeftPattern.size.height)]; UIImage *rightPattern = [self fetchImgWithSrc:iconName rect:right]; [rightPattern drawAsPatternInRect:CGRectMake(width-topRightPattern.size.width, topRightPattern.size.height, rightPattern.size.width, height-bottomRightPattern.size.height - topRightPattern.size.height)]; UIImage *destImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); return destImage; </code></pre> <p>}</p> <pre><code>- (UIImage*)fetchImgWithSrc:(NSString *)iconName rect:(CGRect)clipRect { NSString *completeName = [iconName stringByAppendingString:@".png"]; UIImage *src = [UIImage imageFromFileName:completeName]; NSLog(@"src=%@",NSStringFromCGSize(src.size)); UIImage *tmpPattern = [UIImage imageWithCGImage:CGImageCreateWithImageInRect(src.CGImage, clipRect)]; NSLog(@"dest=%@",NSStringFromCGSize(tmpPattern.size)); return tmpPattern; </code></pre> <p>}</p> <p>the result is like this: <a href="http://i.stack.imgur.com/jO0O5.png" rel="nofollow">http://i.stack.imgur.com/jO0O5.png</a></p> <p>is there something wrong?</p> <p>thanks</p>
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