according to the runtime hook technology shared by the online gods, I want to do it myself
< H2 > principle: intercept the ViewDidiLoad
method of the controller, and realize the method exchange. The effect is obvious and effective < / H2 >.
as shown in the figure:
:
< H2 > thought hard, but I couldn"t figure it out. Just want to know why, is the problem of the system, or my above code is wrong. All I want is to verify < / H2 >