开发中常用到圆角，圆角边框色等，现在记录一种高效绘制方式：
主要用到类有：UIBezierPath、CAShapeLayer
仅仅圆角，直接上代码：
UIImageView *img = [[UIImageView alloc] initWithFrame:CGRectMake([Adapter adapterWidthBy6s:30], 0, [Adapter adapterWidthBy6s:200], [Adapter adapterWidthBy6s:200])]; UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:img.bounds cornerRadius:3.f];
CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init];
maskLayer.frame =
;
maskLayer.path = maskPath.CGPath;
img.layer.mask = maskLayer;
此处比较简单，不再附截图，具体效果，可直接粘贴代码查看效果
圆角+边框色：
UIImageView *img = [[UIImageView alloc] initWithFrame:CGRectMake([Adapter adapterWidthBy6s:30], 0, [Adapter adapterWidthBy6s:200], [Adapter adapterWidthBy6s:200])];
//圆角+边框色
CAShapeLayer *maskLayer = [CAShapeLayer layer];
maskLayer.frame = img.bounds;
CAShapeLayer *borderLayer = [CAShapeLayer layer];
borderLayer.frame = img.bounds;
borderLayer.lineWidth = 1.f;
borderLayer.strokeColor = [UIColor textf0f3f5Color].CGColor;
borderLayer.fillColor = [UIColor clearColor].CGColor;
UIBezierPath *bezierPath = [UIBezierPath bezierPathWithRoundedRect:img.bounds cornerRadius:3.f];
maskLayer.path = bezierPath.CGPath;
borderLayer.path = bezierPath.CGPath;
[img.layer insertSublayer:borderLayer atIndex:0];
[img.layer setMask:maskLayer];
使用Masonry 时，在创建view 时需要设置frame，也可以直接创建CGRect，但要保证size与masonry设置的size相同。
