objective-c - 动画 UINavigationBar

Question

我想滑动右键和标题进出（而不是让东西出现和消失）。我该怎么做呢？

Answer 1

不使用属性设置器语法，即 self.navigationController.navigationBarHidden = NO，而是使用方法设置器来指定动画参数：

[self.navigationController setNavigationBarHidden:NO animated:YES];

这应该达到你想要的。

Answer 2

You can (sort of) animate the title by using a custom view for UINavigationItem's titleView property and doing the animation yourself. As for the right button, you can't animate it without completely rewriting UINavigationBar (not recommended).