iphone - IBOutlets 使用的内存是如何管理的？

Question

我的大多数 View Controller 中有几个 socket ，我总是将它们与头文件中的属性链接起来，如下所示:

IBOutlet UIButton *homeButton;
@property (nonatomic, retain) IBOutlet UIButton *homeButton;

因为我假设内存由 NIB 处理，所以我应该在此处使用分配吗？

Answer 1

引自Resource Programming Guide :

Objects in the nib file are created with a retain count of 1 and then autoreleased. As it rebuilds the object hierarchy, however, UIKit reestablishes connections between the objects using the setValue:forKey: method, which uses the available setter method or retains the object by default if no setter method is available. If you define outlets for nib-file objects, you should always define a setter method (or declared property) for accessing that outlet. Setter methods for outlets should retain their values, and setter methods for outlets containing top-level objects must retain their values to prevent them from being deallocated. If you do not store the top-level objects in outlets, you must retain either the array returned by the loadNibNamed:owner:options: method or the objects inside the array to prevent those objects from being released prematurely.

在那里您可以找到有关如何从 nib 文件加载对象的更多详细信息，但简而言之 - 不，您必须使用 IBOutlet 的保留属性。