查找离自己最近的vc

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/**
* 查找离自己最近的一个父类vc(viewController)
*
* @return 找到的vc
*/
- (UIViewController *)viewController {
for (UIView *next = self.view.superview; next; next = next.superview) {
UIResponder *nextResponder = [next nextResponder];
if ([nextResponder isKindOfClass:[UIViewController class]]) {
return (UIViewController *)nextResponder;
}
}
return nil;
}