IOS-find the uiviewcontroller of the uiview through the message responder chain

Source: Internet
Author: User

@ Interface uiview (firstviewcontroller)

-(Uiviewcontroller *) firstviewcontroller;
-(ID) traverseresponderchainforuiviewcontroller;

@ End

@ Implementation uiview (firstviewcontroller)

-(Uiviewcontroller *) firstviewcontroller {
// Convenience function for casting and to "Mask" The Recursive Function
Return (uiviewcontroller *) [self traverseresponderchainforuiviewcontroller];
}

-(ID) traverseresponderchainforuiviewcontroller {
Id nextresponder = [self nextresponder];
If ([nextresponder iskindofclass: [uiviewcontroller class]) {
Return nextresponder;
} Else if ([nextresponder iskindofclass: [uiview class]) {
Return [nextresponder traverseresponderchainforuiviewcontroller];
} Else {
Return nil;
}
}

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