Singleton与第三方库 [英] Singleton vs. third-party libraries

问题描述

我熟悉的概念Singleton 和这种机制是相当方便，但...

如果我想要一个，共享的一些第三方类的实例会发生什么例如 AFHTTPRequestOperation 或者可能是一些魔法记录？

当我在许多控制器中使用外部类中的一个对象时， >

解决方案

我不熟悉

code> Magical Record 但是对于 AFNewtorking ，在许多情况下做一个单例很有意义。

虽然 AFHTTPRequestOperation 的单例听起来不正确。更好的候选者是 AFHTTPRequestOperationManager 。

报价从 AFHTTPRequestOperationManager类参考

开发人员针对iOS 7或Mac OS X 10.9或更高版本，广泛地与Web服务交易
鼓励子类
AFHTTPSessionManager，提供一个类方法返回一个共享的
单例对象上的认证和其他配置可以
在应用程序之间共享。

对于面向iOS 6或Mac OS X 10.8或更早版本的开发人员，
AFHTTPRequestOperationManager可用于类似

在<2.0版本中与 AFHTTPCLient / p>

一个很好的参考也是这个教程由Scott Sherwood （一如既往）Ray Wenderlich博客。

I'm familiar with the concept of Singleton and this mechanism is pretty handy but..
What happens in case I want one, shared instance of some third-party class e.g. AFHTTPRequestOperation or maybe some Magical Record?
What should I do when I'm using one object from external class in many controllers? Or maybe it is a good practice to instantiate a new object in each controller?

解决方案

I'm not familiar with Magical Record but for AFNewtorking it definitely makes sense to make a singleton in many cases.

Though singleton of AFHTTPRequestOperation doesn't sound quite right. Much better candidate would be AFHTTPRequestOperationManager.

Quote from AFHTTPRequestOperationManager Class Reference

Developers targeting iOS 7 or Mac OS X 10.9 or later that deal extensively with a web service are encouraged to subclass AFHTTPSessionManager, providing a class method that returns a shared singleton object on which authentication and other configuration can be shared across the application.

For developers targeting iOS 6 or Mac OS X 10.8 or earlier, AFHTTPRequestOperationManager may be used to similar effect.

It was similar with AFHTTPCLient in <2.0 versions.

One good reference would also be this tutorial by Scott Sherwood on (as always) Ray Wenderlich blog.

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