#import "ChildOneView.h"

@implementation ChildOneView

- (void)show {

NSLog(@"ChildOneView");

}

- (void)hide {

// todo

}

@end

@interface ChildTwoView : SourceView

@end

#import "ChildTwoView.h"

@implementation ChildTwoView

- (void)show {

NSLog(@"ChildTwoView");

}

- (void)hide {

// todo

}

@end

#import "ViewController.h"

#import "SourceView.h"

#import "ChildOneView.h"

#import "ChildTwoView.h"

@end

@implementation ViewController

- (void)viewDidLoad {

[super viewDidLoad];

//要调用子类的方法只要改这个地方就可以了，方便

SourceView *tmpView = [[ChildTwoView alloc] init];//或[[ChildTwoViewalloc]init]

[tmpView show];

}