NIB/XIB文件通常包含一个UIViewController来处理所有这些问题.在这种情况下，由于它们不是视图控制器(在NIB/XIB中)，因此您需要接管其后加载任务.

Often a NIB/XIB file contains a UIViewController that takes care of all of this. In this case, since their is no view controller (in the NIB/XIB) you need to take over its post-load duties.

直接调用layoutSubviews或通过setNeedsLayout或layoutIfNeeded间接调用layoutSubviews对您没有多大好处，因为默认实现不执行任何操作.

Calling layoutSubviews directly, or indirectly via setNeedsLayout or layoutIfNeeded won't do you much good because the default implementation does nothing.

假设您希望输入视图填充self.view的边界，请执行以下操作:

Assuming you want input view to fill the bounds of self.view you do the following:

InputView *inputView = (InputView*)[nibObjects objectAtIndex:0];
[self.view addSubview:inputView];
inputView.frame = self.view.bounds;
[inputView show];

必须正确设置所有子视图的调整尺寸蒙版 ，显然，如果您不想填充整个边界，则可能需要调整框架.

All the resize masks of the sub-views must be correctly set for this to work and, obviously, if you don't want to fill the full bounds you may want to adjust the frame.