In iOS 7, it was possible to create an NSLayoutConstraint and then modify it's priority property after it was added to a view.

For example you could do:

NSLayoutconstraint *labelConstraint = [myView autoPinEdgeToSuperviewEdge:ALEdgeTop withInset:0];
labelConstraint.priority = UILayoutPriorityDefaultLow;

In iOS 8, this will throw an NSInternalInconsistencyException, saying Mutating a priority from required to not on an installed constraint (or vice-versa) is not supported

The solution is to add the priority before calling autoInstall. To do this, I would recommend adding priority as a parameter that you can pass in when auto creating a constraint.

I've had to switch back to doing manual constraints for now, but if I am correct, that would fix the crashes. Let me know if you need any more information, love the library.

Hey, @smileyborg.

I've been struggling for some time on this and still didn't come up with a normal workaround.

Imagine you have a TableView with some custom cells. There are 3 labels in the cell.
The first one is pinned to the top.
The second one is in the middle.
The third one is pinned to the bottom.
You want the cell to have dynamic height depending on the content inside it.

Done. Everything works great with PureLayout.

Now you want to hide the middle label and set hidden = YES. The label gets hidden, but not from auto layout! so the height of the cell doesn't collapse it stays as if the label is still there.

If you've had an issue like this and know a workaround please tell me how you managed it. I'm a bit desperate at the moment:)

        NSArray *buttons = @[button1, button2];
        [buttons autoSetViewsDimension:ALDimensionWidth toSize:ElementsWidth];
        [buttons autoSetViewsDimension:ALDimensionHeight toSize:ElementsHeight];
        [button1 autoAlignAxis:ALAxisHorizontal toSameAxisOfView:self withOffset:-ElementsHeight + ElementsSpacing/2];
        [button2 autoPinEdge:ALEdgeTop toEdge:ALEdgeBottom ofView:button1 withOffset:ElementsSpacing];
        [button1 autoAlignAxisToSuperviewAxis:ALAxisVertical];
        [button2 autoAlignAxisToSuperviewAxis:ALAxisVertical];

Suggestions?

Hello!

When using auto layout in Interface Builder, you can have some constraints only apply in certain orientations (and certain devices). For example, you can use this to have certain elements appear in Landscape mode and collapse in portrait mode. Is there a good way to do this with PureLayout in code?

Thanks for any thoughts!

I believe that I have found a bug of sorts, but this could be due to some lack of understanding that I possess.. I've created an example project that displays the issue.

Here is the project: https://github.com/bhowell2/PureLayoutExample

Hierarchy:
MainControllerView (full screen)
-ChildControllerView (full screen) (just covers main view)
-SearchFieldView (top 6% (height) of screen and 100% width)
-SearchField (takes up 80% of width of superview and 100% height and is offset from the left by 20)
-ActivityIndicator
-TagScrollView (bottom 94% (height) of screen and 100% width) (scrollview)

You can see the issue when you click load view in the navigation bar. The first time, the view loads as expected. The second time you click load view, two things happen. The top view controller (that should take up 6% height and 100% width) shifts to the left (revealing the brown view beneath). I really have no idea why this is. NOT ONLY does this happen, but the view resizes itself to like 1/4th of the screen...

You will notice that this does not happen when using Apple's (verbose) layout constraints.. (though there is an issue where the brown view appears too quickly.. ignore that for now!)

You may test this by setting usePureLayout in MainViewController.

You can use the animation by setting useAnimations in MainViewController as well.

I first noticed the top view shifting to the left when implementing this without an animation. When i introduced the animation it got really crazy where the view appeared at about 1/4 screen size... (And i just noticed that now it's going to 1/4 screen size with or without the animation)

Any ideas what is going on here? Am I simply setting something wrong?

(I actually made this little project to try to reproduce the top view shifting to the left that i noticed in my own project, but could not get it to reproduce here.. it showed back up when i introduced the animations -and you can see it, by the brown view beneath showing, when it's at 1/4 size, now regardless of animations)

If I set subviews' constraints and pin to edges of superview, how and when can I get the superview's frame? Specifically in Table View Cell?

Thanks.

when i try to build my project using xcode 5.0.2 , sdk ios 7, yosemite, i got so many errors

/Users/user/xxx/Pods/PureLayout/Source/PureLayoutDefines.h:140:24: Use of undeclared identifier 'NSLayoutAttributeTrailingMargin'; did you mean 'NSLayoutAttributeTrailing'?

I have face this issue when updating to the new version and start using this new method (thanks for your amazing library!). I have a constraint with priority 750 and when I send a message to autoInstall it crashes because it is trying to set the priority to 1000

I have tried to fix this issue with this:

+ (void)al_applyGlobalStateToConstraint:(NSLayoutConstraint *)constraint
{
    constraint.priority = _al_globalConstraintPriority <= constraint.priority ? _al_globalConstraintPriority : constraint.priority;
#if __PureLayout_MinBaseSDK_iOS8
    [constraint autoIdentify:_al_globalConstraintIdentifier];
#endif /* __PureLayout_MinBaseSDK_iOS8 */
}

Makes sense to pick up the proper priority, test passes but in my project the app keeps crashing. By removing constraint.priority = _al_globalConstraintPriority it works just fine (it will remain with the same priority that it should, but that way PureLayoutTests do not pass). Any help here?

Thanks!

as far as I can see, the API is the same. It would be great if you could post a note to let us know whether this is a drop-in replacement, or whether we have to watch out for specific changes.

thanks for a great tool, I use it in all my apps now.

• Add setup instructions for Swift (e.g. bridging header)
• Add some sample code to README (Swift & Objective-C) so casual readers get a feel for the syntax
• Add links to Swift sample project
• Put setup instructions at top above cheat sheet
• Add a "table of contents" with links to sections of the README

I want the table cell to grow depending on the content. As you can see from this picture the first cell has a big gap. I pretty much used your https://github.com/smileyborg/TableViewCellWithAutoLayoutiOS8 project.

The only thing I changed was

titleLabel.numberOfLines = 1

to

titleLabel.numberOfLines = 0

because the title may have variable length. And I get the result like you see in the picture. Any ideas whats wrong? Maybe the constrains don't find my use case?

titleLabel.autoPinEdgeToSuperviewEdge(.Top, withInset: kLabelVerticalInsets)
titleLabel.autoPinEdgeToSuperviewEdge(.Leading, withInset: kLabelHorizontalInsets)
titleLabel.autoPinEdgeToSuperviewEdge(.Trailing, withInset: kLabelHorizontalInsets)

bodyLabel.autoPinEdge(.Top, toEdge: .Bottom, ofView: titleLabel, withOffset: 10.0, relation: .GreaterThanOrEqual)

bodyLabel.autoPinEdgeToSuperviewEdge(.Leading, withInset: kLabelHorizontalInsets)
bodyLabel.autoPinEdgeToSuperviewEdge(.Trailing, withInset: kLabelHorizontalInsets)
bodyLabel.autoPinEdgeToSuperviewEdge(.Bottom, withInset: kLabelVerticalInsets)

any ideas?

I wanted to change storyboard contraints in code (removed at runtime ticked)

to problem is that i am basing on super view and my subview has property superview set only after viewWill/Did appear - which causes the subview to jump after it appears on user.

When I do it earlier it crashes hard

PureLayout works fine when laying out items in a UINavigationBar on iOS 8.x +, but when building back for iOS 7.1 I'm not allowed to do that apparently:

*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Cannot modify constraints for UINavigationBar managed by a controller'

Can I just get confirmation that this is or is not a purelayout issue or an autolayout issue.

i added a footer to my UITableView using -(UIView*)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section

and i also wrote this: - (BOOL)allowsFooterViewToFloat{ return YES; }

still the footer doesn't float. How do i fix this?

Hi there,
I am new to autoLayout, and I am considering rewriting my project using pureLayout or other open source code, so I have to do some researching first.

One important thing is could I access any constraint at run time?

e.g. if I created below constraint:

[self.blueView autoSetDimension:ALDimensionHeight toSize:kBlueViewInitialHeight];

Could I access this Height constraint at run time? what's the API? Note I don't want to do things like

self.blueViewHeightConstraint = [self.blueView autoSetDimension:ALDimensionHeight toSize:kBlueViewInitialHeight];

because I don't want to store many properties. I just want change the height constraint at a given time and animate it. Thank you.

I know this has to be possible, and I must just be missing this in the api documentation, but nonetheless I cannot figure this out using purelayout. I want viewA to align it's centerline to viewB.

I did a pod install and after I imported the #import "PureLayout.h" in my .h file, but whe I do build I have the follow error "#import "PureLayout.h" file not found"...

What is wrong??

iOS 8 SDK adds some new things:

• New layout attributes, including first baseline, and layout margin variants
• active property on NSLayoutConstraint (and activateConstraints:/deactivateConstraints: methods) remove the need to manually add constraints to the right view
• Explore automatically setting the identifier string on NSLayoutConstraints created by the API

These new features will be added in a fully backwards-compatible fashion.

Note: PureLayout is fully compatible with iOS 8 already. These are just new extensions to be added.

This is more just a question. Why does the -[UIView autoSetDimension:toSize:relation:] method not have a variant that allows us to specify the priority of the constraint?

Use case - I've just come across a scenario where I have a complex subview and I need to compress the height of that subview as much as possible. The only approach I've found that works is installing a low priority constraint that sets the subview's height to zero. Not sure if this is good practice, but I've tried several other approaches without success, e.g. content hugging priority.

It would be nice if I could achieve this using the PureLayout API - I ended up resorting to the native NSLayoutConstraint API to achieve my goal.

P.S. thanks for the awesome library, I use it constantly

If you use the latest Carthage and try to import PureLayout into your app, Xcode will fail to build the module, because the Modules/module.modulemap file points to PureLayout_iOS.h as the framework header, but the framework header is actually PureLayout.h. Currently thinking of the cleanest way to fix this.

I have written some additional methods for AutoLayout (which will also work with PureLayout) which I've found to be extremely useful. I would like to contribute them to the project, but I'm having trouble figuring out GIT. Can I send them to the project manager?

This block of code from NSArray+PureLayout.m

#if TARGET_OS_IPHONE
    BOOL isRightToLeftLayout = [[UIApplication sharedApplication] userInterfaceLayoutDirection] == UIUserInterfaceLayoutDirectionRightToLeft;
#else
    BOOL isRightToLeftLayout = [[NSApplication sharedApplication] userInterfaceLayoutDirection] == NSUserInterfaceLayoutDirectionRightToLeft;
#endif /* TARGET_OS_IPHONE */
    BOOL shouldFlipOrder = isRightToLeftLayout && (axis != ALAxisVertical); // imitate the effect of leading/trailing when distributing horizontally

produces the following error when added to app extension target:

/Users/zhixuanlai/Developer/Github/Emotic/Emotic/Emotic/Source/NSArray+PureLayout.m:383:48: 'sharedApplication' is unavailable: not available on iOS (App Extension) - Use view controller based solutions where appropriate instead.

Hey,

Great library - I've been enjoying using it to date, and my UITableViewsCells are resizing dynamically very nicely with many custom views. However, I have one issue when using UICollectionView. The iOS framework requires the collection view layout to be specified at initialisation time - as so :

self.myCollectionView = [[UICollectionView alloc] initWithFrame:CGRectMake(0,0,320.0f,50.0f) collectionViewLayout:layout];

If i try to use newAutoLayoutView or initForAutoLayout, i get the error 'UICollectionView must be initialized with a non-nil layout parameter'. Even if i use setCollectionViewLayout directly afterwards, it's still not working.

So, if I have to supply a frame at initialisation, how can this fit with purelayout?

Thanks so much in advance,
R

unfortunately the latest master is not building on OS X 10.7 due to unrecognized selectors and properties:

NSArray+PureLayout.m:58:13: No known class method for selector 'activateConstraints:' 
NSArray+PureLayout.m:78:9: No known class method for selector 'deactivateConstraints:'
NSLayoutConstraint+PureLayout.m:52:18: Property 'active' not found on object of type   'NSLayoutConstraint *'
NSLayoutConstraint+PureLayout.m:119:14: Property 'identifier' not found on object of type 'NSLayoutConstraint *'

Is there any chance to fix this?

Thanks!

Hi guys,
I'm using PureLayout to make my code-based autolayout costraints.First of all thank your for these APIs.
However I've a question about the right constraints I need to set in order to have a label with dynamic height and max bounds in vertical axis.
Consider a label inside a superview: this label has the same width of the superview and height based on it's content; however I would add a limit to the height (the bottom side of the superview). So If the content is too much to be rendered in the space will be clipped.
That's my code:

- (void)updateConstraints {
    if (!constraintsApplied) {
        constraintsApplied = YES;
        [lblPlotSummary autoPinEdge:ALEdgeTop toEdge:ALEdgeTop ofView:self withOffset:10];
        [lblPlotSummary autoPinEdge:ALEdgeLeft toEdge:ALEdgeLeft ofView:self];
        [lblPlotSummary autoPinEdge:ALEdgeRight toEdge:ALEdgeRight ofView:self withOffset:-30];

        [CRDiscoverHotMovieCell autoSetPriority:UILayoutPriorityFittingSizeLevel
                                 forConstraints:^{
                                     [lblPlotSummary autoSetContentHuggingPriorityForAxis:ALAxisVertical];
                                 }];
    }
    [super updateConstraints];
}


- (void)layoutSubviews {
    [super layoutSubviews];
    lblPlotSummary.preferredMaxLayoutWidth = lblPlotSummary.frame.size.width;
    [super layoutSubviews];
}

Now it works fine and the height of the label is based on it's content. However I cannot set the max height to the bottom of the superview.
How can I handle this?
I've tried manually setting it using:

[lblPlotSummary autoPinEdge:ALEdgeBottom toEdge:ALEdgeBottom ofView:self withOffset:-5];

However it simply set the size to the max size and no consider the content of the text.

This is an example without the last line (it consider the height of the content but not the limit of the superview)

Imgur

And this is the example with that line (it does not consider the content and set the height to the bounds of the superview).

Imgur

Any idea?

• Is there a way to add explicit priority to a particular constraint before installing it?
• I tried using [UIView autoSetPriority:forConstraints:] before setting constraints with no success.
• Using ios framework, I understand that it's possible to setup constraint and change its priority and then install it. Is there a way, in PureLayout, to create the constraint without installing it? Or can we remove the constraint temporarily to change it's priority?
• In particular, I want to add two similar constraints that differ only in 'relation' value to a view. And I need to give the constraints different priority.

I have a relatively simple set of constraints I am trying to fulfill (trying to keep a table view pinned to the visible regions of the screen, however, when trying to install the constraints, it does not seem to be installing any. I am creating the table view in pure code. Any ideas as to what the issue is?

// in init 
self.tableView = [[UITableView alloc] initForAutoLayout];
self.tableView.delegate = self;
self.tableView.dataSource = self;
[self.view addSubview:self.tableView];

- (void)updateViewConstraints {
    if (!self.didSetupConstraints) {
       [self.tableView autoPinEdgesToSuperviewEdgesWithInsets:UIEdgeInsetsMake(0, 0, 0, 0) excludingEdge:ALEdgeTop];
       NSLayoutConstraint *topLayoutConstraint = [self.tableView autoPinEdge:ALEdgeTop toEdge:ALEdgeBottom ofView:self.navigationController.navigationBar withOffset:0.0];

        NSLog(@"%@ constraints after auto installation: %@", self.tableView, self.tableView.constraints);

        self.didSetupConstraints = YES;
    }

    [super updateViewConstraints];
}

Output:

<UITableView: 0x157862400; frame = (0 0; 0 0); clipsToBounds = YES; gestureRecognizers = <NSArray: 0x174252ab0>; layer = <CALayer: 0x174233180>; contentOffset: {0, 0}; contentSize: {0, 100}> constraints on setup: (
)

PureLayout is the successor of UIView+AutoLayout which has been extensively and thoroughly tested and proven on iOS.

The biggest difference between iOS and OS X is the inverted Y axis between the two coordinate systems.

For anyone using this project on OS X, I would appreciate feedback from your additional usage/functional testing to validate that there aren't any issues around the flipped Y axis.

As the unit test suite continues to be built out, coverage will improve on that front as well. (If you are interested in contributing some unit tests, that would be greatly appreciated!)

Today is a massive day for PureLayout: commit f644e37 has been pushed to master, which rolls up a ton of API enhancements and improvements! 🎉

Before officially releasing v2.0.0 of PureLayout, I'd appreciate any feedback on the changes, as well as any help you can provide taking the new code for a spin.

The unit test library still needs more work, so if you're interested in truly being a rockstar and contributing to some unit test development, drop a note here and I'll help you get started!

Expect the v2.0.0 release to become official (with a pod update) in the next week.

Hi, I'm using this code

[views autoMatchViewsDimension:ALDimensionHeight];
[views autoDistributeViewsAlongAxis:ALAxisHorizontal alignedTo:ALAttributeHorizontal withFixedSpacing:10.0f];

to align a dynamic number of buttons inside a UIView. It works with all the simulated devices but not on real devices (tested: iPhone4, iPhone4S).

hello， I try to use PureLayout on UIScrollview 。code example
[self.scrollview autoSetDimensionsToSize:CGSizeMake(Screen_width, 30)];
[self.scrollview autoPinEdge:ALEdgeLeft toEdge:ALEdgeLeft ofView:self.titleView];
[self.scrollview autoPinEdge:ALEdgeTop toEdge:ALEdgeTop ofView:self.titleView withOffset:74];

for(int i=0;i<6;i++){
    UIButton *btn = [UIButton newAutoLayoutView];
    [btn setBackgroundColor:[self.titleColor objectAtIndex:i]];
    [btn setTitle:[self.titleText objectAtIndex:i] forState:UIControlStateNormal];
    [self.scrollview addSubview:btn];
    [btn autoAlignAxis:ALAxisHorizontal toSameAxisOfView:self.scrollview];
    [btn autoSetDimensionsToSize:CGSizeMake(58, 20)];
    btn.titleLabel.font = [UIFont systemFontOfSize:14.0];
    [btn autoPinEdge:ALEdgeLeft toEdge:ALEdgeLeft ofView:self.scrollview withOffset:i*63];
    [btn autoPinEdge:ALEdgeTop toEdge:ALEdgeTop ofView:self.scrollview withOffset:0];
}
[self.scrollview setContentSize:CGSizeMake(65*6, 0)];

on ios8，scrollview can sliding，but on ios7 Can't sliding
please help！ thank you！！！

This is surely the wrong way round?

case ALAxisVertical:
   layoutAttribute = NSLayoutAttributeCenterX;
   break;
case ALAxisHorizontal:
   layoutAttribute = NSLayoutAttributeCenterY;
   break;

Or perhaps I'm misunderstanding here? I would expect a horizontal axis alignment to centre along the X axis and a vertical axis alignment to centre along the Y axis.

Hi!
I'm using PureLayout (1.1.0) and have noticed some unexpected behaviour with autoDistributeViewsAlongAxis.

I'm creating UITextFields

- (void)createPinTextView
{
  self.pinTextView = [[UIView alloc] init];

  for (int i = 0; i <= 4; i++) {
    UITextField *textField = [self createPinTextField];
    [self.pinTextFields addObject:textField];
    [self.pinTextView addSubview:textField];
  }

  [self.view addSubview:self.pinTextView];
}

And setting up constraints

- (void)updateViewConstraints
{
  [super updateViewConstraints];

  if (!self.didSetupContraints) {
    NSArray *pinViews = [self.pinTextFields subarrayWithRange:NSMakeRange(0, 5)];
    [pinViews.firstObject autoSetDimension:ALDimensionHeight toSize:40.0f];
    [pinViews autoMatchViewsDimension:ALDimensionHeight];

    [pinViews.lastObject autoAlignAxisToSuperviewAxis:ALAxisHorizontal];

    [pinViews autoDistributeViewsAlongAxis:ALAxisHorizontal
                          withFixedSpacing:18.0f
                              insetSpacing:YES
                                 alignment:NSLayoutFormatAlignAllCenterY];

    self.didSetupContraints = YES;
  }

Last UITextField font size don't match others.

i use it in uitableviewcell, but nothing to show

Hi,
i've used your example where show the usage of UITableViewAutomaticDimension and all works fine.

I've simply changed the UILabel(body) with an UITextView but the text in the UITextView not appear.

The title is set correctly, but the body is not show.

I've to setup something elese to use PureLayout with UITextView?

Thanks

Now I can use autoAlignAxisToSuperviewAxis:ALAxisHorizontal to vertical align center in superview. But how to vertical align center in viewcontroller? That is, vertical align center in remaining area besides navigation bar.
Thanks!

centerX is really a horizontal axis isn't it? It's confusing.

[self.view1 autoAlignAxis:ALAxisVertical toSameAxisOfView:self.view2];

This in fact produces:

view1.centerX == view2.centerX

When I use lldb I query for horizontal axis to see that constraint:

po [self.view1 constraintsAffectingLayoutForAxis:UILayoutConstraintAxisHorizontal]

I read in the docs about a bridging header, but I don't see one in the files, and I am having a hard time incorporating PureLayout into my Swift project. What am I missing? A very small working proof-of-concept project would be welcome.
This looks like a great package; I'm eager to use it.
Thanks!

Seems it's not in the API?
When I wanna dynamically add/remove views it's not convenient.

Pinning to one view is easy:

[view autoPinEdge:ALEdgeTop toEdge:ALEdgeBottom ofView:last withOffset:offset]

but how do I give distance the union of two views (basically picking the lower one)?

you know, after next Feb, apple will reject any app that doesn't support arm64. That means all third-party frameworks in my project need support arm64. PureLayout is a good framework, so will it support arm64 proccessor?

Hi:
How to use pureLayout api add the topLayoutGuide constraints?like this
[NSLayoutConstraint constraintWithItem:self.button
attribute:NSLayoutAttributeTop
relatedBy:NSLayoutRelationEqual
toItem:self.topLayoutGuide
attribute:NSLayoutAttributeBottom
multiplier:1.0
constant:0.0];

I have noticed different behavior regarding right to left languages:

• autoDistributeViewsAlongAxis:alignedTo:withFixedSpacing:insetSpacing:matchedSizes: uses trailing and leading edges when distributing horizontally. With RTL the last view in the array appears first.
• autoDistributeViewsAlongAxis:alignedTo:withFixedSize:insetSpacing: iterates array backwards to maintain the order and result is independent of writing direction.

I think it would make sense to behave consistently in both methods or (imho a better way) have a flag controlling whether it flips the views or lets autolayout take care of it.

Would be happy to make a PR, but wanted to discuss before since it would introduce breaking and/or API changes.

This doesn't appear to be your fault, but it is causing problems for me that would be hard to resolve.

I'm trying to lock into a version, 1.1.0, so my pod won't be updated, since I'm not ready to take the time and make a lot of code changes right now. The tag is v1.1.0, which is making the pod install process throw an error.

Other semantically versioned pods use a format of 1.1.0, which works fine. Before it wasn't necessary to worry about this because the changes weren't breaking changes, but with the 2.0 series they are.

Would it be possible to make a tag that is identical to v1.1.0, called 1.1.0, for the sake of making it work with pod install?

Thanks!

It seems that Travis is silent, but when building on my own machine (10.10.1 and Xcode 6.1) I get this exception in PureLayoutTests.m:259:

Test Case '-[PureLayoutPriorityTests testPriorityForDistributingMultipleViews]' started.
/Users/mnx/play/PureLayout/Example/PureLayoutTests/PureLayoutPriorityTests.m:259: error: -[PureLayoutPriorityTests testPriorityForDistributingMultipleViews] : failed: caught "NSInvalidArgumentException", "*** +[NSLayoutConstraint constraintWithItem:attribute:relatedBy:toItem:attribute:multiplier:constant:]: A multiplier of 0 or a nil second item together with a location for the first attribute creates an illegal constraint of a location equal to a constant. Location attributes must be specified in pairs"
(
    0   CoreFoundation                      0x00007fff926f164c __exceptionPreprocess + 172
    1   libobjc.A.dylib                     0x00007fff85bb66de objc_exception_throw + 43
    2   CoreFoundation                      0x00007fff926f14fd +[NSException raise:format:] + 205
    3   Foundation                          0x00007fff92d50d76 VerifyConstraintArguments + 200
    4   Foundation                          0x00007fff92b1a7b2 +[NSLayoutConstraint constraintWithItem:attribute:relatedBy:toItem:attribute:multiplier:constant:] + 399
    5   Example-Mac                         0x000000010000b654 -[NSArray(PureLayout) autoDistributeViewsAlongAxis:alignedTo:withFixedSize:insetSpacing:] + 1732
    6   PureLayoutTests-Mac                 0x00000001000b0c1e __67-[PureLayoutPriorityTests testPriorityForDistributingMultipleViews]_block_invoke205 + 110
    7   PureLayoutTests-Mac                 0x00000001000acd6e __66-[PureLayoutPriorityTests assertConstraints:areAddedWithPriority:]_block_invoke + 46
    8   Example-Mac                         0x0000000100005551 +[NSView(PureLayout) autoSetPriority:forConstraints:] + 417
    9   PureLayoutTests-Mac                 0x00000001000abe2d -[PureLayoutPriorityTests assertConstraints:areAddedWithPriority:] + 365
    10  PureLayoutTests-Mac                 0x00000001000ab9c1 -[PureLayoutPriorityTests assertConstraintsAreAddedWithDefaultPriorities:] + 449
    11  PureLayoutTests-Mac                 0x00000001000b0848 -[PureLayoutPriorityTests testPriorityForDistributingMultipleViews] + 360
    12  CoreFoundation                      0x00007fff925ca33c __invoking___ + 140
    13  CoreFoundation                      0x00007fff925ca192 -[NSInvocation invoke] + 290
    14  XCTest                              0x0000000100407919 -[XCTestCase invokeTest] + 253
    <...>
)

Everything works as expected on iOS target.

I can take a look at a possible solution, but I wonder why Travis doesn't see this issue?

I subclassed UIView: http://pastebin.com/MVk1XmPS and when I add it to another view of a UIViewController:

self.myView = MyView.newAutoLayoutView()
self.myView.backgroundColor = UIColor.redColor()
self.view.addSubview(self.myView)

the red background is missing. It seems that myView has no width and height. However the content is visible:

I have to hard code the dimension:

self.myView.autoSetDimensionsToSize(CGSize(width: 100, height: 100))

but shouldn't it grow automatically by the size of the content?

If I set kLabelVerticalInsets to anything more or equal than 15.f I get the following warnings in the console:

TableViewCellWithAutoLayout[19708:332390] Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you don't want...
(
"<NSLayoutConstraint:0x7fc42263c400 'UIView-Encapsulated-Layout-Height' V:[UITableViewCellContentView:0x7fc422630e50(44)]>",
"<NSLayoutConstraint:0x7fc42263d4c0 V:|-(15)-[UILabel:0x7fc422631ed0'Marion'] (Names: '|':UITableViewCellContentView:0x7fc422630e50 )>",
"<NSLayoutConstraint:0x7fc42263d870 V:[UILabel:0x7fc422631ed0'Marion']-(>=15)-[UILabel:0x7fc4226324f0'Lorem ipsum dolor sit ame...']>",
"<NSLayoutConstraint:0x7fc42263c3b0 UILabel:0x7fc4226324f0'Lorem ipsum dolor sit ame...'.bottom == UITableViewCellContentView:0x7fc422630e50.bottom - 15>"
)

Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x7fc42263d870 V:[UILabel:0x7fc422631ed0'Marion']-(>=15)-[UILabel:0x7fc4226324f0'Lorem ipsum dolor sit ame...']>

Even though the message should be pretty clear I still don't understand what went wrong..
Thanks in advance.

Hey @smileyborg

I've added the following to my bridging header
#import "PureLayout.h"

and am trying to do a import PureLayout into my Swift UIViewController, but get the following error on Xcode 6.0.2

'No such module PureLayout'

Is there a wrapper class, or similar that I need ?