NSDateFormatter的init方法已弃用？ [英] NSDateFormatter's init method is deprecated?

问题描述

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http://developer.apple.com/iphone/library/documentation/Cocoa/Reference/Foundation/Classes/NSDateFormatter_Class/Reference/Reference.html

NSDateFormatter 的 init 方法在iPhone OS 2.0中可用通过iPhone OS 3.2，因此不是在4.0中。现在，它确实有效，但这看起来很奇怪。这是一个错误还是有其他方法来创建 NSDateFormatter ？

The init method of NSDateFormatter is "Available in iPhone OS 2.0 through iPhone OS 3.2", and therefore not in 4.0. Now, it certainly works, but this seems odd. Is this is a mistake or is there some other way to create a NSDateFormatter?

推荐答案

这个弃用只是苹果清理NSDateFormatter的标题。 init已经在NSSOumberFormatter继承的NSObject中声明。不需要重新声明，但是在实现中，apple会覆盖init，因为子类应该提供超类的默认初始化器的实现。

This deprecation is just apple cleaning up the headers for NSDateFormatter. init is already declared in NSObject which NSNumberFormatter inherits from. Redeclaring is not necessary, however in the implementation apple will override init as subclassess should provide implementations for the default initializer of the superclass.

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