This is utterly baffling to me, making me think I've missed something essential. But I'm trying to create a view controller container to manage two panes (similar to a SplitViewController but with some crucial differences). I've barely begun constructing the class, so I've only got 3 iVars right now:This is utterly baffling to me, making me think
阅读背景：
UIViewController子类不能分配实例变量
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