响应链获取view所在controller

#pragma mark - 获取view所在controller

- (UIViewController *)viewController {

for (UIView* next = [self superview]; next; next = next.superview) {

UIResponder *nextResponder = [next nextResponder];

if ([nextResponder isKindOfClass:[UIViewController class]]) {

return (UIViewController *)nextResponder;

}

}

return nil;

}