iOS获取视图控制器实例的方法详解手机开发

实例方法

- (RootViewController *)<span style="font-family: Arial, Helvetica, sans-serif;">rootViewController 
 
{ 
    UIResponder *next = self.nextResponder; 
    do { 
        if ([next isKindOfClass:[RootViewController class]]) { 
            return (RootViewController *)next; 
        } 
        next = next.nextResponder; 
    } while (next != nil); 
    return nil; 
}

+ (RootViewController *)<span style="font-family: Arial, Helvetica, sans-serif;">rootV<span style="font-family: Arial, Helvetica, sans-serif;">iewControllerWithView:(UIView *)view 
{ 
    UIResponder *next = view.nextResponder; 
    do { 
        if ([next isKindOfClass:[RootViewController class]]) { 
            return (RootViewController *)next; 
        } 
        next = next.nextResponder; 
    } while (next != nil); 
    return nil; 
} 

我个人感觉，类方法用的更好一些，他只用写在你需要的得到的实例的类中调用即可，VIew呢一般就是你的当前视图，而且只用写一次，在一定程度上减少了demo量