1. @property中的 @synthesize 和 @dynamic 區(qū)別：

@synthesize will generate getter and setter methods for your property.

@synthesize 能夠為你的屬性自動生成getter和setter方法。

@dynamic just tells the compiler that the getter and setter methods are implemented not by the class itself but somewhere else(like the superclass)

@dynamic 會告訴編譯器：getter和setter方法在別處生成了（比如父類中），并沒有在本類生成。

Uses for @dynamic are e.g. with subclasses of NSManagedObject(CoreData) or when you want to create an outlet for a property defined by a superclass that was not defined as an outlet;

運行時動態(tài)創(chuàng)建綁定：主要使用在CoreData的實現(xiàn)NSManagedObject子類時使用，由Core Data框架在程序運行的時動態(tài)生成子類屬性。