ios – 我怎么能概述文字字体？

[text drawAtPoint:CGPointMake(0,30) withFont:[UIFont fontWithName:@"Helvetica-Bold" size:(3 * MKroadWidthAtZoomScale(zoomScalE))]

是的,您可以借助CGContextSetDrawingMode(CGContextRef,CGTextDrawingModE)显示轮廓文本,尽管您可能需要调整一些数字和颜色以使其看起来很好.

使用kCGTextFillstroke似乎合乎逻辑,但这可能会使笔划压倒填充.如果你抚摸,然后填充,如下面的块中,你会得到可读文本背后的可见轮廓.

CGContextRef context = UIGraphicsGetCurrentContext();

CGPoint point = CGPointMake(0,30);
CGFloat fontSize = (3 * MKroadWidthAtZoomScale(zoomScalE));
UIFont *font = [UIFont fontWithName:@"Helvetica-Bold" size:fontSize];

// Draw outlined text.
CGContextSetTextDrawingMode(context,kCGTextstroke);
// Make the thickness of the outline a function of the font size in use.
CGContextSetLineWidth(context,fontSize/18);
CGContextSetstrokeColorWithColor(context,[[UIColor redColor] CGColor]);
[text drawAtPoint:point withFont:font];

// Draw filled text.  This will make sure it's clearly readable,while leaving some outline behind it.
CGContextSetTextDrawingMode(context,kCGTextFill);
CGContextSetFillColorWithColor(context,[[UIColor blueColor] CGColor]);
[text drawAtPoint:point withFont:font];