如果有nib文件会调用loadView吗？
如果我重写loadView方法，则无论是否有nib文件，都会调用loadView。如果我不重写loadView并且有一个nib文件，它会被调用吗？
If I override the loadView method, loadView will be called whether there is a nib file. If I don't override loadView and there is a nib file, will it be called ?
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是的，loadView 负责根据视图控制器的类名从已知的包中自动加载 nib 文件。如果您重写
loadView并且不调用[super loadView]，则不会加载任何 nib。当 UIViewController 类的view属性被调用并且为 nil 时，它将调用loadView。另请注意，覆盖
loadView并调用 super 很可能不是您想要的。loadView用于设置self.view属性，仅此而已。其他一切都应该发生在viewDidLoad等中。Yes,
loadViewis responsible for loading nib files automatically from known bundles based on the class name of the view controller. If you overrideloadViewand don't call[super loadView], no nibs will be loaded. The UIViewController class will callloadViewwhen itsviewproperty is called and is nil.Also note that overriding
loadViewand calling super is most likely not what you want.loadViewis for setting theself.viewproperty, that's it. Everything else should happen inviewDidLoadetc.是：
控制台：
Yes:
Console:
是的。无论捆绑包是否有 Nib，加载视图都将始终被调用。
loadView 将负责为 UIViewController 加载视图，该视图可以来自任何来源。
因此，它以两种方式查找视图
1.检查属性nibFile，如果您调用了，则可以设置该属性initWithNibName:捆绑包:
或者如果您有情节提要 - 情节提要也存储在 nib 文件内创建的所有视图
2。如果您没有从任何一个源设置 nib，那么您打算自己创建视图。在这种情况下，您可以稍后将此视图设置为查看控制器的视图属性。
Yes. Load view will be always gets called irrespective of bundle has a Nib or not.
loadView will has the job of loading view for UIViewController which can come from any source.
So, it look for views in two ways
1. Check the property nibFile which can be set if you have called initWithNibName:bundle:
or if you have storyboard - storyboard stores all the views created inside a nib file too
2. If you don't set nib from either of the source then you are planning to create views yourself. In this case you can set this view to view controller's view property later.