初始化对象 [英] Initializing objects
本文介绍了初始化对象的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
使用Objective-C /可可粉,有什么区别:
Using Objective-C/Cocoa, what's the difference between:
NSMutableData *myData = [NSMutableData data];
NSMutableString *myString = [NSMutableString string];
和
NSMutableData *myData = [[NSMutableData alloc] init];
NSMutableString *myString = [[NSMutableString alloc] init];
据我所知,它们似乎具有相同的最终结果?
They seem to have the same end result as far as I can tell?
推荐答案
[NSMutableData数据]被称为帮助器,请查看此帖子,可可中的助手功能
[NSMutableData data] is referred to as a helper, check this post, Helper functions in Cocoa
助手通常会为您处理内存管理,也可以用于返回
Helpers generally take care of the memory management for your, can also be used to return singletons.
[[NSMutableData] alloc] init],则您负责内存管理。
[[NSMutableData] alloc] init], you are responsible for memory management.
您正在使用ARC,而不必释放对象,它会为您完成。
Although if you are using ARC you don't have to release your objects, it does it for you.
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