objc-zen-book-cn
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20 hours ago •
oa414
oa414
ObjC Zen Book 中文翻译
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“你在第一次访问的时候改变了初始化的消耗，产生了副作用，这会让优化性能变得困难（以及测试）” 请问这句话怎么理解？
你好，原文在讲__weak和__strong关键字的时候举了官方文档的一个例子 ```Objective-C MyViewController *myController = [[MyViewController alloc] init...]; // ... MyViewController * __weak weakMyController = myController; myController.completionHandler = ^(NSInteger result) { MyViewController *strongMyController = weakMyController; if (strongMyController) { // ......
