Explain the function of the completion handler.

Explain the function of the completion handler.

题目类型: 技术面试题

这是一道技术面试题，常见于澳洲IT公司面试中。

难度: hard

标签: interviewbit, ios, topic-specific, mobile

参考答案摘要

Completion handlers are basically just functions passed as parameters to other functions. They are used to dealing with the response of asynchronous tasks since we do not know when they will end. Comp...

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