我在UIView上编写了一个类别，它允许我遍历View层次结构:UIView+Capture.htypedefvoid(^MSViewInspectionBlock)(UIView*view,BOOL*stop);@interfaceUIView(Capture)-(void)inspectViewHeirarchy:(MSViewInspectionBlock)block;@endUIView+Capture.m@implementationUIView(Capture)-(void)inspectViewHeirarchy:(MSViewInspectionBlock)block{