Autolayout diagnosis messages do not appear in the output window of Visual Studio for Mac when developing a Xamarin.Mac application.
2018-07-11 15:25:37.278996+0200 test[2765:830514] [Layout] Unable to simultaneously satisfy constraints: ...
To reproduce this just create a new Solution with the Cocoa App
template and add the following code snipped to the ViewController.ViewDidLoad
method.
base.ViewDidLoad();
var label = new NSTextView();
label.TranslatesAutoresizingMaskIntoConstraints = false;
this.View.AddSubview(label);
this.View.AddConstraint(NSLayoutConstraint.Create(
label,
NSLayoutAttribute.Leading,
NSLayoutRelation.Equal,
this.View,
NSLayoutAttribute.Leading,
1.0f,
10));
this.View.AddConstraint(NSLayoutConstraint.Create(
label,
NSLayoutAttribute.Trailing,
NSLayoutRelation.Equal,
this.View,
NSLayoutAttribute.Trailing,
1.0f,
10));
this.View.AddConstraint(NSLayoutConstraint.Create(
label,
NSLayoutAttribute.Top,
NSLayoutRelation.Equal,
this.View,
NSLayoutAttribute.Top,
1.0f,
10));
this.View.AddConstraint(NSLayoutConstraint.Create(
label,
NSLayoutAttribute.Bottom,
NSLayoutRelation.Equal,
this.View,
NSLayoutAttribute.Bottom,
1.0f,
10));
this.View.AddConstraint(NSLayoutConstraint.Create(
label,
NSLayoutAttribute.Bottom,
NSLayoutRelation.Equal,
this.View,
NSLayoutAttribute.Bottom,
1.0f,
20));
The last two constraints obviously conflict and, when added to a fresh Xcode project, will generate debug output that looks similar to the first example. Is there a way to turn these messages on when debugging a Xamarin.Mac application from Visual Studio for Mac?
Greetings Julius
=== Visual Studio Community 2017 for Mac ===
Version 7.5.3 (build 7)
Installation UUID: 57fb200c-8ea4-4cf4-9b75-78a7e0eea435
Runtime:
Mono 5.10.1.57 (2017-12/ea8a24b1bbf) (64-bit)
GTK+ 2.24.23 (Raleigh theme)
Xamarin.Mac 4.4.1.178 (master / eeaeb7e6)
Package version: 510010057