Common errors with AutoLayout

Common errors with AutoLayout

1:the view hierarchy isn't prepared for the constraint: <nslayoutconstraint:0x8e82e40 uisearchbar:0x8e7fa80.top = = UIV Iew:0x8b7c510.top + 20>
When added to a view, the constraint ' s items must is descendants of that view (or the view itself). This would crash if the constraint needs to being resolved before the view hierarchy is assembled. Break on-[uiview _viewhierarchyunpreparedforconstraint:] to Debug.

This error is to be added to the current view immediately after creating the Searchbar, otherwise there will be a warning when the constraint is added. Move the code circled by the red line to the point where the arrow is pointing.

Common errors with AutoLayout