Auto property synthesis would not synthesize proterty; it'll be a implementedby it superclass, use @

Auto property synthesis won't synthesize property ' title '; It is implemented by its superclass, use @dynamic to acknowledge intention

This is to say that the compiler automatically gives the property title composition getter and setter will be implemented on its parent class, that is, the xcode6.3 upgrade ios8.3 version of the Uiviewcontroller has a title attribute, Now it doesn't know which title it is.

This is not what we want, so add @dynamic tell the compiler that this property is dynamic, the dynamic meaning is when you compile the time to know that it is only in this class composition;

Solve:

In the. m file

@dynamic title;

Auto property synthesis would not synthesize proterty; it'll be a implementedby it superclass, use @