在一些重要场合，常常要做出选择，为了让大家的选择更方便，简洁，本人特地根据一些实例编写了一些自动选择代码，希望能给大家带来一些启示。-In some important occasions, often have to make a choice, the choice to make everyone more convenient, simple, I specially prepared according to some examples of some automatic selection code, we hope to bring some enlightenment.