NSNumber文字 [英] NSNumber Literals

问题描述

我对Objective-C非常陌生.我知道C和C ++，但是Objective-C有相当的学习曲线.无论如何，有没有一种较短的方法(如果存在的话，可以使用某种NSNumber文字)来编写以下内容:

I am very new to Objective-C. I know C and C++ but Objective-C has quite the learning curve. Anyway, is there a shorter way (possibly by some kind of NSNumber literal if such exists) to write the following:

[Tyler setArms:[[[NSNumber alloc] autorelease] initWithInt:1]];

推荐答案

是的，只需使用许多帮助功能之一，例如

Yes, just use one of the many helper functions such as numberWithInt::

[Tyler setArms:[NSNumber numberWithInt:1]];

表达式[NSNumber numberWithInt:1]等效于[[[NSNumber alloc] initWithInt:1] autorelease]，等效于[[[NSNumber alloc] autorelease] initWithInt:1].后者的表达极为罕见.

The expression [NSNumber numberWithInt:1] is equivalent to [[[NSNumber alloc] initWithInt:1] autorelease], which is equivalent to [[[NSNumber alloc] autorelease] initWithInt:1]. The latter expression is extremely uncommon.

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