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理清 Block 底层结构及其捕获行为
source link: https://juejin.im/post/5bb09160f265da0adb30e30d
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Block 的本质 本质 Block 的本质是一个 Objective-C 对象，它内部也拥有一个 isa 指针。 Block 是封装了函数及其调用环境的 Objective-C 对象 底层数据结构 一个简单示例： int main(int argc, c
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