Objective-C 运行时版本会为用户保留关联引用吗?
问题说明
当一些像这样的代码时:
When some codes like this:
objc_setAssociatedObject (
obj,
&key,
val,
OBJC_ASSOCIATION_RETAIN
);
我需要打电话给相关人员吗
Do I need to call related
objc_setAssociatedObject (
obj,
&key,
nil,
OBJC_ASSOCIATION_RETAIN
);
释放保留值?Objective-C 运行时会自动释放 dealloc 或其他地方的关联引用吗?
to release the retained value? Does Objective-C runtime auto release the associative references in dealloc or somewhere?
正确答案
当父对象被释放时，关联的对象将被释放.请参阅文档 这里，特别是这个例子:
Associated objects will be released when the parent object is deallocated. See the documentation here, specifically this example:
在第 1 点，字符串 overview 仍然有效，因为 OBJC_ASSOCIATION_RETAIN 策略指定数组保留关联对象.然而，当数组被释放时(在第 2 点)，overview 被释放，因此在这种情况下也被释放.
At point 1, the string
overviewis still valid because theOBJC_ASSOCIATION_RETAINpolicy specifies that the array retains the associated object. When the array is deallocated, however (at point 2),overviewis released and so in this case also deallocated.
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