- (void)setUpDashedBox2:(UIView *)view{
CAShapeLayer *shapeLayer = [CAShapeLayer layer];
[shapeLayer setBounds:view.bounds];
[shapeLayer setPosition:view.center];
[shapeLayer setFillColor:[[UIColor groupTableViewBackgroundColor] CGColor]];
// 设置虚线颜色为blackColor
[shapeLayer setStrokeColor:[[UIColor blackColor] CGColor]];
// [shapeLayer setStrokeColor:[HMMainlColor CGColor]];
// 3.0f设置虚线的宽度
[shapeLayer setLineWidth:1.0f];
[shapeLayer setLineJoin:kCALineJoinRound];
// 3=线的宽度 1=每条线的间距
[shapeLayer setLineDashPattern:
[NSArray arrayWithObjects:[NSNumber numberWithInt:5],
[NSNumber numberWithInt:3],nil]];
// Setup the path
CGMutablePathRef path = CGPathCreateMutable();
CGPathMoveToPoint(path, NULL, 0, 3);
CGPathAddLineToPoint(path, NULL, 45,3);
CGPathMoveToPoint(path, NULL, 45, 3);
CGPathAddLineToPoint(path, NULL,45, 45);
CGPathMoveToPoint(path, NULL,45, 45);
CGPathAddLineToPoint(path, NULL, 0, 45);
CGPathMoveToPoint(path, NULL, 0, 45);
CGPathAddLineToPoint(path, NULL, 0, 3);
[shapeLayer setPath:path];
CGPathRelease(path);
[[view layer] addSublayer:shapeLayer];
}
只需要设置虚线框的四个坐标（左上（ 0, 3）、右上（ 45, 3）、右下（ 45, 45)、左下（ 0, 45））。
