UML Learning (class diagrams and sequence diagrams, etc.)

Visio drawing UML diagrams
Use Visio tips this uml shape's drawing page is not part of a UML model diagram how can i solve this problem?
New, select drawing type, select software and Database template, select UML Model diagram, NOTE: You may not be able to edit shape text if you do not select UML Model diagram.
Tip "This uml shape is on a drawing page that is not part of a UML model diagram that is designed to use a drawing created with a UML Model Diagram template"
So the first step in drawing UML diagrams with Visio is to choose the diagram type as UML model in software.

Also can refer to Baidu Cloud disk of UML learning materials

Reference:
Relationships among several kinds of UML: inheritance, implementation, dependency, association, aggregation, combination of relations and differences
http://blog.csdn.net/sfdev/article/details/3906243

How to draw a C + + class diagram with Visio 2007
Http://jingyan.baidu.com/article/9f7e7ec07286e16f281554f7.html

Summary of several relationships of UML class diagrams (a series of articles)
http://kb.cnblogs.com/page/129490/

Understand UML class diagrams and time series diagrams
Http://www.cnblogs.com/me115/p/4092632.html

On UML Nine diagrams of the concept and model of UML
http://blog.csdn.net/jiuqiyuliang/article/details/8552956

UML Learning (class diagrams and sequence diagrams, etc.)