哪种方式是正确的方式分配内存与属性？ [英] Which way is the correct way to allocate memory with a property?

问题描述

哪种方式是正确的？

  NSString * c = [[NSString alloc] init]; 
 self.character = c; 
 [c release]; 
  

或

  self.character = [[NSString alloc] init]; 
  

为什么？感谢。

解决方案

这取决于您的属性如何声明。如果你使用

  @property（nonatomic，retain）NSString * someString; 
  

将创建setter以保留someString，在这种情况下，正确的方法是您的第一个方法。如果你使用：

  @property（nonatomic，assign）NSString * someString; 
  

你的第二个方法是正确的，因为它只会分配指针， p>

Which way is correct?

NSString *c = [[NSString alloc] init];
self.character = c;
[c release];

or

self.character = [[NSString alloc] init];

And why? Thanks.

解决方案

It depends on how your property is declared. If you used

@property (nonatomic, retain) NSString *someString;

The setter will be created to retain someString, in which case the correct way is your first method. If you used:

@property (nonatomic, assign) NSString *someString;

Your second method will be correct, since it will just assign the pointer and not retain anything.

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