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增加点core text代码的注释

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卢克
2013-03-19 15:16:06 +08:00
parent e601172580
commit 1542cc8445
1 changed files with 5 additions and 4 deletions
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_posts/2013/2013-03-11-core-text.md
+5 -4
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@@ -162,15 +162,16 @@ callbacks的结构体为CTRunDelegateCallbacks，主要是包含一些回调函
{
CGContextRef context = UIGraphicsGetCurrentContext();
//这四行代码只是简单测试drawRect中context的坐标系
CGContextSetRGBFillColor (context, 1, 0, 0, 1);
CGContextFillRect (context, CGRectMake (0, 200, 200, 100 ));
CGContextSetRGBFillColor (context, 0, 0, 1, .5);
CGContextFillRect (context, CGRectMake (0, 200, 100, 200));
CGContextSetTextMatrix(context, CGAffineTransformIdentity);//设置字形变换矩阵为CGAffineTransformIdentity，也就是说每一个字形都不做图形变换
CGContextSetTextMatrix(context, CGAffineTransformIdentity);
CGAffineTransform flipVertical = CGAffineTransformMake(1,0,0,-1,0,self.bounds.size.height);
CGContextConcatCTM(context, flipVertical);
CGAffineTransform flipVertical = CGAffineTransformMake(1,0,0,-1,0,self.bounds.size.height);
CGContextConcatCTM(context, flipVertical);//将当前context的坐标系进行flip
NSMutableAttributedString *attributedString = [[[NSMutableAttributedString alloc] initWithString:@"测试富文本显示"] autorelease];