my Xcode -- compile errors are just showing the red exclamation point

I must have flipped a switch in my 开发者_开发问答Xcode somewhere. Now compile errors just show up with the red exclamation point at the left of the line with the error. I no longer get the red bar that explains what is going on. I can get it by clicking on the exclamation point, but I'd rather get that bar by default.

How can I change it back?

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Check what you have selected inside.. View->Message Bubble - > it should be Show Issue...

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Try Preferences » Building » Message Bubbles » Show During Builds. You can also right-click on bubbles and find options there in the context menu.