通过当前view得到所在的viewcontroller

 1 @implementation UIView (GetVCAdditions)
 2 
 3 - (UIViewController *)GetiewController {
 4     Class vcc = [UIViewController class];
 5     UIResponder *responder = self;
 6     while ((responder = [responder nextResponder]))
 7         if ([responder isKindOfClass: vcc])
 8             return (UIViewController *)responder;
 9     return nil;
10 }