iOS：NSMutableArray alloc / init和arrayWithObjects之间的区别： [英] iOS: Difference between NSMutableArray alloc/init and arrayWithObjects:

问题描述

之间

  NSMutableArray * p = [[NSMutableArray alloc] initWithObjects： ...] 
  

和

  NSMutableArray * p = [NSMutableArray arrayWithObjects：...] 
  

解决方案

在第一个，你有所有权的数组对象&你必须释放它们。

  NSMutableArray * p = [[NSMutableArray alloc] initWithObjects：...] 
 [p release]; 
  

&最后一个你不需要发布，因为你没有数组对象的所有权。

  NSMutableArray * p = [NSMutableArray arrayWithObjects ：...] //这是自动释放的
  

如果你调用release中的，那么它会崩溃你的应用程序。 p>

What is the difference between

NSMutableArray* p = [[NSMutableArray alloc] initWithObjects:...]

and

NSMutableArray* p = [NSMutableArray arrayWithObjects:...]

解决方案

In the first one, you have the ownership of array object & you have to release them.

NSMutableArray* p = [[NSMutableArray alloc] initWithObjects:...];
[p release];

& last one you dont need to release as you don't have the ownership of array object.

NSMutableArray* p = [NSMutableArray arrayWithObjects:...]; //this is autoreleased

If you call release in this, then it will crash your application.

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