关于点击状态栏不回到顶部问题解决方法

// When the user taps the status bar, the scroll view beneath the touch which is closest to the status bar will be scrolled to top, but only if its `scrollsToTop` property is YES, its delegate does not return NO from `shouldScrollViewScrollToTop`, and it is not already at the top.
// On iPhone, we execute this gesture only if there's one on-screen scroll view with `scrollsToTop` == YES. If more than one is found, none will be scrolled.
@property(nonatomic) BOOL  scrollsToTop;          // default is YES.


设置这个属性，可以让点击状态栏不回到顶部，但是如果我们需要让他回到顶部，程序又不响应操作，解决方法

刚才上面的官方文档说了，只有当一个主控制器有一个scrollview 并把这个属性设置为yes，其他的scrollview.scrollsToTop = NO 这样才会响应这个事件，原理很简单，如果有2个scrollview，系统根本不知道你需要哪个滚动到最上面