我有此代码,其中应重复相同的UIImage:一个UIImage CoreGraphics在创建不重复
UIView *paperMiddle = [[UIView alloc] initWithFrame:CGRectMake(0, 34, 320, rect.size.height - 34)];
UIImage *paperPattern = paperBackgroundPattern(context);
paperMiddle.backgroundColor = [UIColor colorWithPatternImage:paperPattern];
[self addSubview:paperMiddle];
而这正是paperBackgroundPattern
方法:
UIImage *paperBackgroundPattern(CGContextRef context) {
CGRect paper3 = CGRectMake(10, -15, 300, 16);
CGRect paper2 = CGRectMake(13, -15, 294, 16);
CGRect paper1 = CGRectMake(16, -15, 288, 16);
//Shadow
CGContextSetShadowWithColor(context, CGSizeMake(0,0), 10, [[UIColor colorWithWhite:0 alpha:0.5]CGColor]);
CGPathRef path = createRoundedRectForRect(paper3, 0);
CGContextSetFillColorWithColor(context, [[UIColor blackColor] CGColor]);
CGContextAddPath(context, path);
CGContextFillPath(context);
//Layers of paper
CGContextSaveGState(context);
drawPaper(context, paper3);
drawPaper(context, paper2);
drawPaper(context, paper1);
CGContextRestoreGState(context);
UIGraphicsBeginImageContextWithOptions(CGSizeMake(320, 1), NO, 0);
UIImage *paperImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return paperImage;
}
它不重复图片。这里有图像的结果是它显示为屏幕的顶部像素(这不是我给出的框架)。
任何想法为什么?
请不要删除并重新发布您的问题http://stackoverflow.com/questions/9767477/isnt-repeating-background-created-in-coregraphics。相反,编辑并改进它们。 – 2012-03-19 21:08:15