release 和 drain
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release 和 drain
分类: Object-c2011-12-27 20:14 270人阅读 评论(1) 收藏 举报
triggersreference
drain:
- <span style="font-size:18px;">In a reference-counted environment, releases and pops the receiver; in a garbage-collected environment, triggers garbage collection if the memory allocated since the last collection is greater than the current threshold.</span>
release
- <span style="font-size:18px;">Decrements the receiver’s reference count. (required)</span>
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