Merge pull request #231 from facebook/paltrace-view

Make `paltrace` work on selected views

Author: kastiglione

commands/FBAutoLayoutCommands.py

@@ -31,7 +31,9 @@ def args(self):
 
   def run(self, arguments, options):
     view = fb.evaluateInputExpression(arguments[0])
-    print fb.describeObject('[{} _autolayoutTrace]'.format(view))
+    opt = fb.evaluateBooleanExpression('[UIView instancesRespondToSelector:@selector(_autolayoutTraceRecursively:)]')
+    traceCall = '_autolayoutTraceRecursively:1' if opt else '_autolayoutTrace'
+    print fb.describeObject('[{} {}]'.format(view, traceCall))
 
 
 def setBorderOnAmbiguousViewRecursive(view, width, color):