返回块驻留在本地堆栈上 [英] Returning block that lives on the local stack

问题描述

clang分析器可以检查返回的基于堆栈的内存.

The clang analyzer can check for returning stack-based memory.

dispatch_block_t getPrintBlock (const char *msg) {
    return ^{
        printf("%s", msg);
    };
}

引发此错误:returning block that lives on the local stack

此错误是什么意思?

推荐答案

您需要复制该块以将其移动到堆中.

You need to make a copy of the block to move it to the heap.

即像这样:

dispatch_block_t createPrintBlock (const char *msg) {
    return Block_copy(^{
        printf("%s", msg);
    }) ;
}

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