ios绘制虚线

转载于 2013-12-30 12:01:06 发布 · 608 阅读

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 UIImageView *imageView1 = [[UIImageView alloc]initWithFrame:CGRectMake(0, 100, 320, 20)];

 [self.view addSubview:imageView1];

 UIGraphicsBeginImageContext(imageView1.frame.size);   //开始画线
 [imageView1.image drawInRect:CGRectMake(0, 0, imageView1.frame.size.width, imageView1.frame.size.height)];
 CGContextSetLineCap(UIGraphicsGetCurrentContext(), kCGLineCapRound);  //设置线条终点形状
 float lengths[] = {10,5};
 CGContextRef line = UIGraphicsGetCurrentContext();
 CGContextSetStrokeColorWithColor(line, [UIColor redColor].CGColor);

 CGContextSetLineDash(line, 0, lengths, 2);  //画虚线
 CGContextMoveToPoint(line, 0.0, 20.0);    //开始画线
 CGContextAddLineToPoint(line, 310.0, 20.0);
 CGContextStrokePath(line);
 imageView1.image = UIGraphicsGetImageFromCurrentImageContext();