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iOS基于 UILabel实现文字添加描边功能
时间：2022-06-26 05:45:26 编辑：袖梨 来源：一聚教程网
可以达到文字描一圈黑边的效果:
继承UILabel以后重载drawTextInRect:
- (void)drawTextInRect:(CGRect)rect
{
CGSize shadowOffset = self.shadowOffset;
UIColor *textColor = self.textColor;
CGContextRef c = UIGraphicsGetCurrentContext();
CGContextSetLineWidth(c, 1);
CGContextSetLineJoin(c, kCGLineJoinRound);
CGContextSetTextDrawingMode(c, kCGTextStroke);
self.textColor = [UIColor whiteColor];
[super drawTextInRect:rect];
CGContextSetTextDrawingMode(c, kCGTextFill);
self.textColor = textColor;
self.shadowOffset = CGSizeMake(0, 0);
[super drawTextInRect:rect];
self.shadowOffset = shadowOffset;
}