so sorry, safeAreaLayoutGuide is my PR.
by default, self.view.mas_safeAreaLayoutGuide is self.view.mas_safeAreaLayoutGuideBottom

Do not understand why this change, with the use of examples do not match, easy to read down
Provided examples of use
  make.edges.equalTo (self.view.mas_safeAreaLayoutGuide) .inset (10.0);
  make.right.bottom.equalTo (self.view.mas_safeAreaLayoutGuide);
  make.width.height.equalTo (self.view.mas_safeAreaLayoutGuide) .sizeOffset (CGSizeMake (- 40.0, - 40.0));

@CDYeah you are right, it is my mistake

#473 fixed this issue.

When release new version?
I see the Demo define is OK

• (MASViewAttribute *)mas_safeAreaLayoutGuide {
  return [[MASViewAttribute alloc] initWithView:self item:self.safeAreaLayoutGuide layoutAttribute:NSLayoutAttributeNotAnAttribute];
  }
  but in release 1.1.0 version is
• (MASViewAttribute *)mas_safeAreaLayoutGuide {
  return [[MASViewAttribute alloc] initWithView:self item:self.safeAreaLayoutGuide layoutAttribute:NSLayoutAttributeBottom];
  }

@robertjpayne We need release a new version for iOS 11 and iPhone X.

is this just a mistake?

@iwill when did a new version for iOS 11 and iPhone X will release? Now 1.1.0 will crash

@wuweili Sorry, I'm also waiting for it ...

I'm using a gist temporarily which works fine.

I see the source code:

mas_safeAreaLayoutGuide is isEqual to mas_safeAreaLayoutGuideBottom

so if you use mas_safeAreaLayoutGuide to code:

make.edges.equalTo(self.view.mas_safeAreaLayoutGuide);

it mean :

make.edges.equalTo(self.view.mas_safeAreaLayoutGuideBottom);

so it crash

to resolve , you can use:

make.top.equalTo(self.view.mas_safeAreaLayoutGuideTop);
make.bottom.equalTo(self.view.mas_safeAreaLayoutGuideBottom);
make.left.equalTo(self.view.mas_safeAreaLayoutGuideLeft);
make.right.equalTo(self.view.mas_safeAreaLayoutGuideRight);

instead

why demo is ok?

@yimao009 because demo uses the latest version with this fix. The latest cocoapods version has this problem. Just compare UIView+MASAdditions.m file in your project and from github. https://github.com/SnapKit/Masonry/blob/master/Masonry/View%2BMASAdditions.m#L132

@cloudkite Could you bump version? or I could do it and prepare a pull request.