Why can't I see or click "no response" on the screen after adding a view? View Analysis

Why can't I see or click "no response" on the screen after adding a view? View Analysis

Invisible after adding a view:

1. The created view is not added to the parent view.

2. No background color is set for the view. The color is clearColor.

3. No frame is set when a view is created.

4. The process of creating a view is written in the method, but it is not called

5. The parent view to be added is nil, and the parent view does not exist. Therefore, the parent view cannot be added.

Cannot respond to interaction after adding a view

1. Find the hierarchical relationship of the view, whether there are other views above the current view, and set the color to clearColor

2. The view is out of the management scope of the parent view and cannot respond to interaction when the view is out of the management scope of the parent view.

3. View user interaction (userInteractionEnabled) may not be enabled or accidentally disabled

4. the user interaction of the parent view is disabled, so manually open the user interaction of the view to be used.

My vs2008 failed to respond after switching from the source view to the design view. In the end, I can only end the dedicated process and ask what methods are available.

It is generally because there is a problem with framwork. Just reload it.

A Word document is always displayed in a common view. I clicked the page view in the lower-left corner of the page, but the page in the View menu didn't respond. It was fixed.

1. Select all text
2. Click format-column, and set the number of columns to 1. OK